blocks|key|3793335|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3793336|转到react本地项目的android/目录|unordered-list-item|offset|length|style|CODE|3793337|创建一个名为local.properties的文件，其中包含以下行：|3793338|3793339|sdk.dir+=+/Users/USERNAME/Library/Android/sdk|code-block|syntax|javascript|3793340|其中USERNAME是您的macOS用户名|3793341|entityMap^0|0|C|8|0|6|G|0|0|0|2|8|0^^$0|@$1|2|3|-4|4|5|6|T|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|U|7|@$D|V|E|W|F|G]]|8|@]|9|$]]|$1|H|3|I|4|C|6|X|7|@$D|Y|E|Z|F|G]]|8|@]|9|$]]|$1|J|3|-4|4|5|6|10|7|@]|8|@]|9|$]]|$1|K|3|L|4|M|6|11|7|@]|8|@]|9|$N|O]]|$1|P|3|Q|4|5|6|12|7|@$D|13|E|14|F|G]]|8|@]|9|$]]|$1|R|3|-4|4|5|6|15|7|@]|8|@]|9|$]]]|S|$]]

<ul>
<li>Go to the <code>android/</code> directory of your react-native project</li>
<li>Create a file called <code>local.properties</code> with this line:</li>
</ul>

<pre class="lang-none prettyprint-override"><code>sdk.dir = /Users/USERNAME/Library/Android/sdk
</code></pre>

Where <code>USERNAME</code> is your macOS username

blocks|key|3793901|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3793902|转到React原生项目->+Android+|unordered-list-item|3793903|
|3793904|创建一个文件local.properties|offset|length|style|CODE|3793905|3793906|Open+文件|3793907|将您的Android+SDK路径粘贴到下面的|ordered-list-item|3793908|3793909|3793910|-+in+Windows+`sdk.dir+=+C:\\Users\\USERNAME\\AppData\\Local\\Android\\sdk`
-+in+macOS+`sdk.dir+=+/Users/USERNAME/Library/Android/sdk`
-+in+linux+`sdk.dir+=+/home/USERNAME/Android/Sdk`|code-block|syntax|javascript|3793911|​|3793912|将USERNAME替换为您的用户名|3793913|现在，在您的终端中运行react-native+run-android。|3793914|entityMap^0|0|0|0|6|G|0|0|0|0|0|0|0|0|1|8|0|B|O|0^^$0|@$1|2|3|-4|4|5|6|16|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|17|7|@]|8|@]|9|$]]|$1|D|3|E|4|5|6|18|7|@]|8|@]|9|$]]|$1|F|3|G|4|C|6|19|7|@$H|1A|I|1B|J|K]]|8|@]|9|$]]|$1|L|3|E|4|5|6|1C|7|@]|8|@]|9|$]]|$1|M|3|N|4|C|6|1D|7|@]|8|@]|9|$]]|$1|O|3|P|4|Q|6|1E|7|@]|8|@]|9|$]]|$1|R|3|-4|4|5|6|1F|7|@]|8|@]|9|$]]|$1|S|3|-4|4|5|6|1G|7|@]|8|@]|9|$]]|$1|T|3|U|4|V|6|1H|7|@]|8|@]|9|$W|X]]|$1|Y|3|Z|4|5|6|1I|7|@]|8|@]|9|$]]|$1|10|3|11|4|5|6|1J|7|@$H|1K|I|1L|J|K]]|8|@]|9|$]]|$1|12|3|13|4|5|6|1M|7|@$H|1N|I|1O|J|K]]|8|@]|9|$]]|$1|14|3|-4|4|5|6|1P|7|@]|8|@]|9|$]]]|15|$]]

<ol>
<li>Go to your React-native Project -> Android </li>
<li>Create a file <code>local.properties</code></li>
<li>Open the file</li>
<li>paste your Android SDK path like below

<ul>
<li>in Windows <code>sdk.dir = C:\\Users\\USERNAME\\AppData\\Local\\Android\\sdk</code></li>
<li>in macOS <code>sdk.dir = /Users/USERNAME/Library/Android/sdk</code></li>
<li>in linux <code>sdk.dir = /home/USERNAME/Android/Sdk</code></li>
</ul></li>
</ol>

Replace <code>USERNAME</code> with your user name

Now, Run the <code>react-native run-android</code> in your terminal.

blocks|key|3793343|text|您可以尝试添加ANDROID_PATH|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3793344|export+ANDROID_HOME=/Users/<username>/Library/Android/sdk/
export+PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools|code-block|syntax|javascript|3793345|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can try adding ANDROID_PATH

<pre><code>export ANDROID_HOME=/Users/&lt;username&gt;/Library/Android/sdk/
export PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
</code></pre>

blocks|key|3793650|text|打开~/.bash_profile+并添加：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|3793651|+export+ANDROID_HOME=~/Library/Android/sdk/
+export+PATH=$PATH:~/android-sdks/platform-tools/
+export+PATH=$PATH:~/android-sdks/tools/|code-block|syntax|javascript|3793652|配置文件源~/.bash_|3793653|​|3793654|📷|atomic|3793655|3793656|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/596971e00f1dd6d0bd3af4714ca883c2.png|imageAlt^0|2|F|I|4|2|F|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|19|8|@]|E|@]|F|$J|K]]|$1|L|3|M|5|6|7|1A|8|@]|E|@]|F|$]]|$1|N|3|O|5|6|7|1B|8|@]|E|@]|F|$]]|$1|P|3|Q|5|R|7|1C|8|@]|E|@$9|1D|A|1E|1|1F]]|F|$]]|$1|S|3|O|5|6|7|1G|8|@]|E|@]|F|$]]|$1|T|3|-4|5|6|7|1H|8|@]|E|@]|F|$]]]|U|$V|$5|W|X|Y|F|$Z|10|11|-4]]]]

Open <code>~/.bash_profile</code> and add:
<pre><code> export ANDROID_HOME=~/Library/Android/sdk/
 export PATH=$PATH:~/android-sdks/platform-tools/
 export PATH=$PATH:~/android-sdks/tools/
</code></pre>
source ~/.bash_profile
<a href="https://i.stack.imgur.com/OMxtg.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OMxtg.png" alt="enter image description here" /></a>

blocks|key|1682945|text|我认为不建议通过更新local.properties文件来获得缺少的环境变量。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1682946|更新您的环境变量：|1682947|1682948|+How+to+open+the+AVD+manager+on+OSX+from+iTerm2?|blockquote|1682949|1682950|1682951|android-28+/+android-30|1682952|sdk可以安装在/Library/Android/sdk或/usr/local/上，请通过|1682953|which+sdkmanager|code-block|syntax|javascript|1682954|导出ANDROID_HOME|1682955|export+ANDROID_HOME=$HOME/Library/Android/sdk|1682956|或|1682957|export+ANDROID_HOME="/usr/local/share/android-sdk"|1682958|然后将其添加到$PATH|1682959|export+PATH=$ANDROID_HOME/tools:$PATH
export+PATH=$ANDROID_HOME/platform-tools:$PATH
export+PATH=$ANDROID_HOME/build-tools/28.0.1:$PATH|1682960|android-23|1682961|export+ANT_HOME=/usr/local/opt/ant
export+MAVEN_HOME=/usr/local/opt/maven
export+GRADLE_HOME=/usr/local/opt/gradle
export+ANDROID_HOME=/usr/local/share/android-sdk
export+ANDROID_SDK_ROOT=/usr/local/share/android-sdk
export+ANDROID_NDK_HOME=/usr/local/share/android-ndk
export+INTEL_HAXM_HOME=/usr/local/Caskroom/intel-haxm|1682962|我使用brew+cask在these+instructions之后安装了Android+SDK。|BOLD|1682963|更多信息请参见https://developer.android.com/studio/intro/update#sdk-manager|1682964|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/65711364/how-to-open-the-avd-manager-on-osx-from-iterm2/65711365#65711365|1|https://gist.github.com/agrcrobles/165ac477a9ee51198f4a870c723cd441|2|https://developer.android.com/studio/intro/update#sdk-manager^0|A|G|0|0|0|1|1B|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|3|9|10|B|D|I|1|0|7|1P|2|0^^$0|@$1|2|3|4|5|6|7|1T|8|@$9|1U|A|1V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1W|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|1X|8|@]|D|@]|E|$]]|$1|I|3|J|5|K|7|1Y|8|@]|D|@$9|1Z|A|20|1|21]]|E|$]]|$1|L|3|-4|5|6|7|22|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|23|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|24|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|25|8|@]|D|@]|E|$]]|$1|R|3|S|5|T|7|26|8|@]|D|@]|E|$U|V]]|$1|W|3|X|5|6|7|27|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|T|7|28|8|@]|D|@]|E|$U|V]]|$1|10|3|11|5|6|7|29|8|@]|D|@]|E|$]]|$1|12|3|13|5|T|7|2A|8|@]|D|@]|E|$U|V]]|$1|14|3|15|5|6|7|2B|8|@]|D|@]|E|$]]|$1|16|3|17|5|T|7|2C|8|@]|D|@]|E|$U|V]]|$1|18|3|19|5|6|7|2D|8|@]|D|@]|E|$]]|$1|1A|3|1B|5|T|7|2E|8|@]|D|@]|E|$U|V]]|$1|1C|3|1D|5|6|7|2F|8|@$9|2G|A|2H|B|C]|$9|2I|A|2J|B|1E]]|D|@$9|2K|A|2L|1|2M]]|E|$]]|$1|1F|3|1G|5|6|7|2N|8|@]|D|@$9|2O|A|2P|1|2Q]]|E|$]]|$1|1H|3|-4|5|6|7|2R|8|@]|D|@]|E|$]]]|1I|$1J|$5|1K|1L|1M|E|$1N|1O]]|1P|$5|1K|1L|1M|E|$1N|1Q]]|1R|$5|1K|1L|1M|E|$1N|1S]]]]

I don't think it's recommended to update the <code>local.properties</code> file to get to add the missing environment vars.
<h2>Update your environment variables:</h2>
<blockquote>
<a href="https://stackoverflow.com/questions/65711364/how-to-open-the-avd-manager-on-osx-from-iterm2/65711365#65711365">How to open the AVD manager on OSX from iTerm2?</a>
</blockquote>
<h3>android-28 / android-30</h3>
sdk can be installed on /Library/Android/sdk or /usr/local/ to be sure check it by
<pre><code>which sdkmanager
</code></pre>
<h3>Export ANDROID_HOME</h3>
<pre><code>export ANDROID_HOME=$HOME/Library/Android/sdk
</code></pre>
or
<pre><code>export ANDROID_HOME=&quot;/usr/local/share/android-sdk&quot;
</code></pre>
Then add it to the $PATH
<pre><code>export PATH=$ANDROID_HOME/tools:$PATH
export PATH=$ANDROID_HOME/platform-tools:$PATH
export PATH=$ANDROID_HOME/build-tools/28.0.1:$PATH
</code></pre>
<h3>android-23</h3>
<pre><code>export ANT_HOME=/usr/local/opt/ant
export MAVEN_HOME=/usr/local/opt/maven
export GRADLE_HOME=/usr/local/opt/gradle
export ANDROID_HOME=/usr/local/share/android-sdk
export ANDROID_SDK_ROOT=/usr/local/share/android-sdk
export ANDROID_NDK_HOME=/usr/local/share/android-ndk
export INTEL_HAXM_HOME=/usr/local/Caskroom/intel-haxm
</code></pre>
I used <code>brew cask</code> to install Android SDK following <a href="https://gist.github.com/agrcrobles/165ac477a9ee51198f4a870c723cd441" rel="noreferrer">these instructions</a>.
More info see <a href="https://developer.android.com/studio/intro/update#sdk-manager" rel="noreferrer">https://developer.android.com/studio/intro/update#sdk-manager</a>

blocks|key|3793485|text|echo+"sdk.dir+=+/Users/$(whoami)/Library/Android/sdk"+>+android/local.properties|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3793486|entityMap^0|0|28|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<code>echo "sdk.dir = /Users/$(whoami)/Library/Android/sdk" &gt; android/local.properties</code>

blocks|key|1459800|text|如果你在windows上，转义(添加反斜杠到)+android/local.properties文件中的反斜杠和冒号。如果它不在那里，那么创建它|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1459801|sdk.dir+=+C\:\\Android\\sdk|code-block|syntax|javascript|1459802|entityMap^0|O|O|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

If you are on windows escape (add backlashes to) the backslashes and the colon in the <code>android/local.properties</code> file. If its not there then create it

<pre><code>sdk.dir = C\:\\Android\\sdk
</code></pre>

blocks|key|1683174|text|更新了React+Native0.58MAC/Unix入门步骤|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1683175|1683176|在终端|unordered-list-item|1683177|中打开bash_profile|1683178|1683179|+nano+~/.bash_profile|blockquote|1683180|1683181|1683182|将https://facebook.github.io/react-native/docs/getting-started中的|1683183|滚动到底部并添加以下行|1683184|1683185|1683186|导出安卓_HOME=$HOME/库/Android/sdk|1683187|1683188|导出路径=$PATH：$ANDROID_HOME/模拟器|1683189|导出路径=$PATH：$ANDROID_HOME/tools|1683190|导出路径=$PATH：$ANDROID_HOME/tools/bin|1683191|导出路径=$PATH：$ANDROID_HOME/platform-tools|1683192|1683193|Control%2BS+to+save
Control%2BX+to+exit
Y+to+save+changes|code-block|syntax|javascript|1683194|终端中的|1683195|更新更改|1683196|1683197|1683198|+source+~/.bash_profile|CODE|1683199|1683200|1683201|1683202|验证路径：|1683203|1683204|1683205|+echo+$PATH|1683206|1683207|1683208|1683209|确认是否一切正常：|1683210|1683211|1683212|+adb+devices|1683213|1683214|entityMap|0|LINK|mutability|MUTABLE|url|https://facebook.github.io/react-native/docs/getting-started^0|0|R|0|0|0|0|0|0|0|0|1|1O|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|M|0|0|0|0|0|0|0|1|A|0|0|0|0|0|0|0|1|B|0|0^^$0|@$1|2|3|4|5|6|7|2E|8|@$9|2F|A|2G|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|2H|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|2I|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|2J|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|2K|8|@]|D|@]|E|$]]|$1|M|3|N|5|O|7|2L|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|2M|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|2N|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|2O|8|@]|D|@$9|2P|A|2Q|1|2R]]|E|$]]|$1|T|3|U|5|I|7|2S|8|@]|D|@]|E|$]]|$1|V|3|-4|5|6|7|2T|8|@]|D|@]|E|$]]|$1|W|3|-4|5|6|7|2U|8|@]|D|@]|E|$]]|$1|X|3|Y|5|O|7|2V|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|2W|8|@]|D|@]|E|$]]|$1|10|3|11|5|6|7|2X|8|@]|D|@]|E|$]]|$1|12|3|13|5|6|7|2Y|8|@]|D|@]|E|$]]|$1|14|3|15|5|6|7|2Z|8|@]|D|@]|E|$]]|$1|16|3|17|5|6|7|30|8|@]|D|@]|E|$]]|$1|18|3|-4|5|6|7|31|8|@]|D|@]|E|$]]|$1|19|3|1A|5|1B|7|32|8|@]|D|@]|E|$1C|1D]]|$1|1E|3|1F|5|6|7|33|8|@]|D|@]|E|$]]|$1|1G|3|1H|5|I|7|34|8|@]|D|@]|E|$]]|$1|1I|3|-4|5|6|7|35|8|@]|D|@]|E|$]]|$1|1J|3|-4|5|6|7|36|8|@]|D|@]|E|$]]|$1|1K|3|1L|5|O|7|37|8|@$9|38|A|39|B|1M]]|D|@]|E|$]]|$1|1N|3|-4|5|6|7|3A|8|@]|D|@]|E|$]]|$1|1O|3|-4|5|6|7|3B|8|@]|D|@]|E|$]]|$1|1P|3|-4|5|6|7|3C|8|@]|D|@]|E|$]]|$1|1Q|3|1R|5|I|7|3D|8|@]|D|@]|E|$]]|$1|1S|3|-4|5|6|7|3E|8|@]|D|@]|E|$]]|$1|1T|3|-4|5|6|7|3F|8|@]|D|@]|E|$]]|$1|1U|3|1V|5|O|7|3G|8|@$9|3H|A|3I|B|1M]]|D|@]|E|$]]|$1|1W|3|-4|5|6|7|3J|8|@]|D|@]|E|$]]|$1|1X|3|-4|5|6|7|3K|8|@]|D|@]|E|$]]|$1|1Y|3|-4|5|6|7|3L|8|@]|D|@]|E|$]]|$1|1Z|3|20|5|I|7|3M|8|@]|D|@]|E|$]]|$1|21|3|-4|5|6|7|3N|8|@]|D|@]|E|$]]|$1|22|3|-4|5|6|7|3O|8|@]|D|@]|E|$]]|$1|23|3|24|5|O|7|3P|8|@$9|3Q|A|3R|B|1M]]|D|@]|E|$]]|$1|25|3|-4|5|6|7|3S|8|@]|D|@]|E|$]]|$1|26|3|-4|5|6|7|3T|8|@]|D|@]|E|$]]]|27|$28|$5|29|2A|2B|E|$2C|2D]]]]

Updated steps for React Native0.58 to get started on MAC/Unix
<ul>
<li>Open bash_profile in terminal</li>
</ul>
<blockquote>
nano ~/.bash_profile
</blockquote>
<ul>
<li>Scroll to bottom and add this lines from <a href="https://facebook.github.io/react-native/docs/getting-started" rel="noreferrer">https://facebook.github.io/react-native/docs/getting-started</a>:</li>
</ul>
<blockquote>
export ANDROID_HOME=$HOME/Library/Android/sdk
export PATH=$PATH:$ANDROID_HOME/emulator
export PATH=$PATH:$ANDROID_HOME/tools
export PATH=$PATH:$ANDROID_HOME/tools/bin
export PATH=$PATH:$ANDROID_HOME/platform-tools
</blockquote>
<pre><code>Control+S to save
Control+X to exit
Y to save changes
</code></pre>
<ul>
<li>Update changes in terminal</li>
</ul>
<blockquote>
<code>source ~/.bash_profile</code>
</blockquote>
<ul>
<li>Validate Path:</li>
</ul>
<blockquote>
<code>echo $PATH</code>
</blockquote>
<ul>
<li>Confirm if all okay:</li>
</ul>
<blockquote>
<code>adb devices</code>
</blockquote>

blocks|key|5210108|text|用于Windows用户的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5210109|一个简单的解决方案是将SDK路径设置为环境变量列表。|5210110|5210111|转到环境变量。(您的PC+>属性)|ordered-list-item|5210112|创建新的系统变量|5210113|将变量名设置为将变量值设置为Android+Sdk+Sdk+OK+(3个对话框重复3次)|offset|length|style|BOLD|5210114|5210115|备注：|5210116|您的Android+Sdk通常位于|5210117|C:\Users\YourUserName\AppData\Local\Android\Sdk|5210118|确保关闭您当前的终端，因为您的终端保存了所有预先存在的环境变量。|5210119|entityMap^0|0|0|0|0|0|1|3|8|3|0|0|0|3|0|0|0|1B|0|2|8|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|13|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|14|8|@]|9|@]|A|$]]|$1|J|3|K|5|G|7|15|8|@$L|16|M|17|N|O]|$L|18|M|19|N|O]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1B|8|@$L|1C|M|1D|N|O]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1E|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1F|8|@$L|1G|M|1H|N|O]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1I|8|@$L|1J|M|1K|N|O]]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|Z|$]]

For Windows Users

One simple solution is to set the SDK path to the Enviroment Variables list.

<ol>
<li>Head over to the Enviromnent variables. (Your PC > Properties )</li>
<li>Create New System variables</li>
<li>Set the Variable name to ANDROID_HOME</li>
<li>Set the Variable value to your Android Sdk Location</li>
<li>Press OK (3 times for 3 dialog boxes)</li>
</ol>

Note:

Your Android Sdk is generally located in

C:\Users\YourUserName\AppData\Local\Android\Sdk

Make sure to close your current terminal because your terminal holds all of your pre-existing Environment Variables.

blocks|key|3793786|text|修复Linux发行版上的SDK路径错误|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3793787|3793788|您的项目没有通过提供的路径在project+Settings中找到SDK设置，因此项目需要指向正确的方向，您有几个选项可以实现这一点，但让我们先从找到正确的SDK文件夹开始。|3793789|3793790|查找您的SDK|3793791|3793792|来自包管理器的|3793793|3793794|如果您正在使用一个基于包的JRE安装，比如Java8JRE，通过一个基于Debian的发行版中的自定义PPA，或者使用OpenJDK，目录很可能是/usr/lib/jvm/java-8-oracle+(或者您选择的任何版本)。您可以在JAVA_HOME环境变量中找到此路径集：|offset|length|style|BOLD|3793795|$+echo+$JAVA_HOME
+/usr/lib/jvm/java-8-oracle|code-block|syntax|javascript|3793796|3793797|手册下载|3793798|3793799|如果你是通过Java+JRE/SDK下载安装的，那么它将放在你放置文件夹的任何地方，例如/home/username/jdk-8u121_1.8.0+(或类似的东西)。|3793800|脚本化安装甚至可能会将SDK添加到/opt/+Java+-8-oracle，但在撰写本文时，Java安装说明会将文件夹位置留给您。|3793801|3793802|Android+Studio2.2|3793803|3793804|最后，如果您使用的是Android+Studio，SDK将放置在您设置的位置，以放置通过Studio的SDK管理器下载的SDK文件。通过进入SDK文件>设置>外观和行为>系统设置>+Android+SDK位置，您可以在顶部找到位置设置以及要更改的选项，默认文件夹为~/Android/Sdk.|3793805|​|3793806|📷|atomic|3793807|3793808|设置SDK路径|3793809|现在我们知道SDK在哪里了，是时候让react-native知道了。|3793810|3793811|选项1:使用local.properties设置|3793812|3793813|此方法非常简单，所需的就是在以下文件夹中创建文件local.properties，其中Project_Folder是React-Native应用程序的基础：|3793814|项目_文件夹/Android/App|3793815|在local.properties中，您希望将变量sdk.dir设置为您的SDK文件夹的路径：|3793816|sdk.dir=/home/username/Android/Sdk|3793817|虽然这是解决问题的最简单方法，但它并不是最好的方法，尤其是当您处理多个项目时。对于每个项目，您必须为每个项目创建此文件，如果文件夹发生更改，则计划为每个项目的local.properties更改此文件。|3793818|保存文件后，重新运行android+react-native+run-命令。|3793819|3793820|选项2:使用环境变量设置文件夹|3793821|3793822|另一个选项是将SDK文件夹设置为React-Native默认查找的本地环境变量。为此，我们将添加ANDROID_HOME路径。作为奖励，我们还可以在相同的位置添加我们的android工具。我们需要将它添加到主目录中的.bash_profile或.profile文件中，这些文件是最后加载的，这样我们就可以确保没有其他东西覆盖我们所做的设置。由于这些文件位于您的主目录中，因此不需要使用提升的权限进行编辑。|3793823|**$+vim+~/.profile**++(use+nano+or+pico+if+you+prefer)|3793824|在文件中，添加以下几行代码，将SDK文件夹替换为上面找到的那个文件夹。我将使用Android+Studio文件夹作为示例：|3793825|export+ANDROID_HOME="~/Android/Sdk"
export+PATH=$PATH:~/Android/Sdk/tools:~/Android/Sdk/platform-tools|3793826|保存文件，然后应用配置文件设置：|3793827|$+source+~/.profile
$+echo+$ANDROID_HOME
/home/dbrown/Android/Sdk|3793828|如果Sdk文件夹显示正确，恭喜您！重新运行您的react-native命令，并观察应用程序构建过程的继续。|3793829|3793830|如果您仍然有问题，请使用|3793831|3793832|如果由于某种原因，你在:你的/+SDK+/文件夹中收到错误消息">+failed+to+find+target+with+hash+string+'android-23‘，你需要确保项目的内部版本和安装的SDK的版本相匹配(React-Native默认为23.0.1)。您可以在Project_Folder/android/app/build.gradle，中找到default版本，然后搜索buildToolsVersion.当然，您可以更改此文件的版本，或者在Android+Studio中，转到文件>项目结构来更改Project+SDK。我不建议更改此版本，除非您完全知道自己在做什么，否则请安装项目正在寻找的SDK版本。|3793833|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/50845b4df489e8a6f7f91c27b8803cee.png|imageAlt^0|0|0|0|0|0|0|0|0|0|3U|0|0|0|0|4|0|0|0|2C|0|0|1T|0|0|0|H|0|0|0|42|0|0|1|0|0|1|0|1|0|0|0|1|0|0|7|0|0|Y|0|0|0|O|0|0|0|26|0|0|I|0|0|1B|0|0|Y|0|0|2T|0|0|12|0|0|0|F|0|0|0|5M|0|0|1I|0|0|1P|0|0|2U|0|0|G|0|0|1T|0|0|1H|0|0|0|C|0|0|0|8Q|0^^$0|@$1|2|3|4|5|6|7|2X|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|2Y|8|@]|9|@]|A|$]]|$1|C|3|D|5|6|7|2Z|8|@]|9|@]|A|$]]|$1|E|3|-4|5|6|7|30|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|31|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|32|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|33|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|34|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|35|8|@$N|36|O|37|P|Q]]|9|@]|A|$]]|$1|R|3|S|5|T|7|38|8|@]|9|@]|A|$U|V]]|$1|W|3|-4|5|6|7|39|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|3A|8|@$N|3B|O|3C|P|Q]]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|3D|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|3E|8|@$N|3F|O|3G|P|Q]]|9|@]|A|$]]|$1|12|3|13|5|6|7|3H|8|@$N|3I|O|3J|P|Q]]|9|@]|A|$]]|$1|14|3|-4|5|6|7|3K|8|@]|9|@]|A|$]]|$1|15|3|16|5|6|7|3L|8|@$N|3M|O|3N|P|Q]]|9|@]|A|$]]|$1|17|3|-4|5|6|7|3O|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|3P|8|@$N|3Q|O|3R|P|Q]]|9|@]|A|$]]|$1|1A|3|1B|5|6|7|3S|8|@$N|3T|O|3U|P|Q]]|9|@]|A|$]]|$1|1C|3|1D|5|1E|7|3V|8|@$N|3W|O|3X|P|Q]]|9|@$N|3Y|O|3Z|1|40]]|A|$]]|$1|1F|3|1B|5|6|7|41|8|@$N|42|O|43|P|Q]]|9|@]|A|$]]|$1|1G|3|1H|5|6|7|44|8|@$N|45|O|46|P|Q]]|9|@]|A|$]]|$1|1I|3|1J|5|6|7|47|8|@$N|48|O|49|P|Q]]|9|@]|A|$]]|$1|1K|3|-4|5|6|7|4A|8|@]|9|@]|A|$]]|$1|1L|3|1M|5|6|7|4B|8|@$N|4C|O|4D|P|Q]]|9|@]|A|$]]|$1|1N|3|-4|5|6|7|4E|8|@]|9|@]|A|$]]|$1|1O|3|1P|5|6|7|4F|8|@$N|4G|O|4H|P|Q]]|9|@]|A|$]]|$1|1Q|3|1R|5|6|7|4I|8|@$N|4J|O|4K|P|Q]]|9|@]|A|$]]|$1|1S|3|1T|5|6|7|4L|8|@$N|4M|O|4N|P|Q]]|9|@]|A|$]]|$1|1U|3|1V|5|T|7|4O|8|@$N|4P|O|4Q|P|Q]]|9|@]|A|$U|V]]|$1|1W|3|1X|5|6|7|4R|8|@$N|4S|O|4T|P|Q]]|9|@]|A|$]]|$1|1Y|3|1Z|5|6|7|4U|8|@$N|4V|O|4W|P|Q]]|9|@]|A|$]]|$1|20|3|-4|5|6|7|4X|8|@]|9|@]|A|$]]|$1|21|3|22|5|6|7|4Y|8|@$N|4Z|O|50|P|Q]]|9|@]|A|$]]|$1|23|3|-4|5|6|7|51|8|@]|9|@]|A|$]]|$1|24|3|25|5|6|7|52|8|@$N|53|O|54|P|Q]]|9|@]|A|$]]|$1|26|3|27|5|T|7|55|8|@$N|56|O|57|P|Q]]|9|@]|A|$U|V]]|$1|28|3|29|5|6|7|58|8|@$N|59|O|5A|P|Q]]|9|@]|A|$]]|$1|2A|3|2B|5|T|7|5B|8|@$N|5C|O|5D|P|Q]]|9|@]|A|$U|V]]|$1|2C|3|2D|5|6|7|5E|8|@$N|5F|O|5G|P|Q]]|9|@]|A|$]]|$1|2E|3|2F|5|T|7|5H|8|@$N|5I|O|5J|P|Q]]|9|@]|A|$U|V]]|$1|2G|3|2H|5|6|7|5K|8|@$N|5L|O|5M|P|Q]]|9|@]|A|$]]|$1|2I|3|-4|5|6|7|5N|8|@]|9|@]|A|$]]|$1|2J|3|2K|5|6|7|5O|8|@$N|5P|O|5Q|P|Q]]|9|@]|A|$]]|$1|2L|3|-4|5|6|7|5R|8|@]|9|@]|A|$]]|$1|2M|3|2N|5|6|7|5S|8|@$N|5T|O|5U|P|Q]]|9|@]|A|$]]|$1|2O|3|-4|5|6|7|5V|8|@]|9|@]|A|$]]]|2P|$2Q|$5|2R|2S|2T|A|$2U|2V|2W|-4]]]]

<h2>Fixing SDK Path Errors on Linux Distributions</h2>

<hr>

Your project is not finding the SDK set in the Project Settings via the path provided, so the project needs to be pointing in the right direction, and you have a couple options to accomplish this, but let's start by finding the correct SDK folder first.

<hr>

<h1>Finding your SDK</h1>

<hr>

From Package Manager

<hr>

If you are using a package-based JRE install like Java 8 JRE via a the custom PPA in a Debian-based distribution, or used OpenJDK, the directory will most likely be /usr/lib/jvm/java-8-oracle (or whatever version you have chosen). You can find this path set in the JAVA_HOME environment variable:

<pre><code>$ echo $JAVA_HOME
 /usr/lib/jvm/java-8-oracle
</code></pre>

<hr>

Manual Download

<hr>

If you have installed via the Java JRE/SDK download, it will be wherever you placed the folder, e.g. /home/username/jdk-8u121_1.8.0 (or something similar).

Scripted installs may even add the SDK to /opt/java-8-oracle, but as of this writing, the Java Install instructions leave the folder placement in your hands. 

<hr>

Android Studio 2.2

<hr>

Lastly if you are using Android Studio, the SDK is placed where you have set it to place the SDK files downloaded through the Studio's SDK Manager. By going to File > Settings > Appearance &amp; Behavior > System Settings > Android SDK, you can find the SDK location setting at the top with the option to change, and the default folder being ~/Android/Sdk.

<a href="https://i.stack.imgur.com/7pf1s.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7pf1s.png" alt="Android Studio SDK Path"></a>

<h1>Setting the SDK Path</h1>

Now that we know where the SDK is, it is time to let react-native know.

<hr>

Option 1: Set with local.properties

<hr>

This method is very simple, and all that is needed is creating the file local.properties in the following folder, where Project_Folder is the base of your React-Native application: 

Project_Folder/Android/App

In your local.properties, you want to set the variable sdk.dir to the path of your SDK folder:

<pre><code>sdk.dir=/home/username/Android/Sdk
</code></pre>

While this is the easiest way to remedy the issue, it is not the best, especially if you work with multiple projects. For every project, you will have to create this file for every project, and if the folder changes plan on changing this file for each project's local.properties.

Once the file is saved, rerun the react-native run-android command.

<hr>

Option 2: Settings Folders with Environment Variables

<hr>

The other option is to set the SDK folders to the local environment variables that React-Native looks for by default. To do so, we will add the ANDROID_HOME path. As a bonus we can also add our android tools in the same place. We need to add this to rather the .bash_profile or .profile files in our home directory, which are loaded last, so we can make sure that nothing else is overriding the settings we make. Since these are in your home directory, there is no need to edit with escalated privileges.

<pre><code>**$ vim ~/.profile** (use nano or pico if you prefer)
</code></pre>

In the file add the following lines replacing the SDK folder with the one you found above. I will be using the Android Studio folder as an example:

<pre><code>export ANDROID_HOME="~/Android/Sdk"
export PATH=$PATH:~/Android/Sdk/tools:~/Android/Sdk/platform-tools
</code></pre>

Save the file, then apply the profile settings:

<pre><code>$ source ~/.profile
$ echo $ANDROID_HOME
/home/dbrown/Android/Sdk
</code></pre>

If the Sdk folder shows correctly, congratulations! Re-run your react-native command, and watch the app build process continue forward.

<hr>

If you still have issues

<hr>

If for some reason you receive the error "> failed to find target with hash string 'android-23' in: your/sdk/folder, you need to make sure that the project's build version and the version of the SDK installed match (React-Native defaults to 23.0.1). You can find the default version in Project_Folder/android/app/build.gradle, and then searching for buildToolsVersion. You can of course change the version from this file, or in Android Studio go to File > Project Structure to change the Project SDK. I would not suggest changing this version unless you absolutely know what you are doing, otherwise install the SDK version the project is looking for.

blocks|key|5210506|text|此答案适用于MacOs+Catalina用户或zsh用户，因为您的Mac现在使用zsh作为默认的登录shell和交互式shell。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5210507|如果您遵循React+Native+Setting+up+the+development+environment指南的文档。然后执行以下操作。|5210508|首先检查local.properties文件是否存在。如果该文件不存在，则创建并添加以下行。|5210509|sdk.dir=/Users/<youcomputername>/Library/Android/sdk|code-block|syntax|javascript|5210510|完成上述更改后，现在执行以下操作。|5210511|5210512|使用代码编辑器打开~/.zshrc。在我的例子中，我使用vim|ordered-list-item|5210513|5210514|vim+~/.zshrc|5210515|5210516|为路径添加以下行。|5210517|5210518|export+ANDROID_HOME="/Users/<yourcomputername>/Library/Android/sdk"
export+PATH=$ANDROID_HOME/emulator:$PATH
export+PATH=$ANDROID_HOME/tools:$PATH
export+PATH=$ANDROID_HOME/tools/bin:$PATH
export+PATH=$ANDROID_HOME/platform-tools:$PATH|5210519|5210520|确保正确添加上面的行，否则它会给你一个奇怪的错误。|blockquote|5210521|5210522|5210523|5210524|保存更改并关闭编辑器。|5210525|5210526|最后，现在编译您的更改|5210527|source+~/.zshrc|5210528|我让这个在我的案例中起作用。我希望这对你有帮助。|5210529|entityMap^0|6|E|N|3|0|I|12|0|4|G|0|0|0|0|9|8|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1L|8|@$9|1M|A|1N|B|C]|$9|1O|A|1P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1Q|8|@$9|1R|A|1S|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1T|8|@$9|1U|A|1V|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1W|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1X|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1Y|8|@]|D|@]|E|$]]|$1|R|3|S|5|T|7|1Z|8|@$9|20|A|21|B|C]]|D|@]|E|$]]|$1|U|3|-4|5|6|7|22|8|@]|D|@]|E|$]]|$1|V|3|W|5|L|7|23|8|@]|D|@]|E|$M|N]]|$1|X|3|-4|5|6|7|24|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|T|7|25|8|@]|D|@]|E|$]]|$1|10|3|-4|5|6|7|26|8|@]|D|@]|E|$]]|$1|11|3|12|5|L|7|27|8|@]|D|@]|E|$M|N]]|$1|13|3|-4|5|6|7|28|8|@]|D|@]|E|$]]|$1|14|3|15|5|16|7|29|8|@]|D|@]|E|$]]|$1|17|3|-4|5|6|7|2A|8|@]|D|@]|E|$]]|$1|18|3|-4|5|6|7|2B|8|@]|D|@]|E|$]]|$1|19|3|-4|5|6|7|2C|8|@]|D|@]|E|$]]|$1|1A|3|1B|5|T|7|2D|8|@]|D|@]|E|$]]|$1|1C|3|-4|5|6|7|2E|8|@]|D|@]|E|$]]|$1|1D|3|1E|5|6|7|2F|8|@]|D|@]|E|$]]|$1|1F|3|1G|5|L|7|2G|8|@]|D|@]|E|$M|N]]|$1|1H|3|1I|5|6|7|2H|8|@]|D|@]|E|$]]|$1|1J|3|-4|5|6|7|2I|8|@]|D|@]|E|$]]]|1K|$]]

This answer is for <code>MacOs Catalina</code> user or <code>zsh</code> users as your Mac now uses zsh as the default login shell and interactive shell.
If you follow along with the docs of React Native <code>Setting up the development environment</code> guide. Then do the following.
Firstly check if <code>local.properties</code> file exists or not.
If the file does not exist then create and add the following line.
<pre><code>sdk.dir=/Users/&lt;youcomputername&gt;/Library/Android/sdk
</code></pre>
After doing the above changes now do the following.
<ol>
<li>Open <code>~/.zshrc</code> using a code-editor. In my case I use vim</li>
</ol>
<pre><code>vim ~/.zshrc
</code></pre>
<ol start="2">
<li>Add the following line for the path.</li>
</ol>
<pre><code>export ANDROID_HOME=&quot;/Users/&lt;yourcomputername&gt;/Library/Android/sdk&quot;
export PATH=$ANDROID_HOME/emulator:$PATH
export PATH=$ANDROID_HOME/tools:$PATH
export PATH=$ANDROID_HOME/tools/bin:$PATH
export PATH=$ANDROID_HOME/platform-tools:$PATH
</code></pre>
<blockquote>
Make sure to add the above line correctly else it will give you a weird error.
</blockquote>
<ol start="4">
<li>Save the changes and close the editor.
</li>
<li>Finally, now compile your changes
</li>
</ol>
<pre><code>source ~/.zshrc
</code></pre>
I get this working in my case. I hope this helps you.

blocks|key|5209645|text|您必须写入正确的完整路径。不要使用“~/Library/Android/sdk”|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5209646|vi+~/.bashrc

export+ANDROID_HOME=/Users/{UserName}/Library/Android/sdk
export+PATH=${PATH}:${ANDROID_HOME}/tools
export+PATH=${PATH}:${ANDROID_HOME}/platform-tools

source+~/.bashrc|code-block|syntax|javascript|5209647|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You must write correct full path.
Don't use '~/Library/Android/sdk'

<pre><code>vi ~/.bashrc

export ANDROID_HOME=/Users/{UserName}/Library/Android/sdk
export PATH=${PATH}:${ANDROID_HOME}/tools
export PATH=${PATH}:${ANDROID_HOME}/platform-tools

source ~/.bashrc
</code></pre>

blocks|key|5209454|text|在Ubuntu上，你必须从Android+Studio中单独获取SDK。奇怪的是，路径在Android+Studio中可以工作，但对于React+Native，你需要创建一个名为local.properties的文件。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5209455|例如inn+~/AwesomeProject/android，然后插入下面这行：|5209456|sdk.dir=/path/to/sdk/in/your/computer|5209457|entityMap^0|2H|G|0|6|O|0|0|11|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|K|$]]

On Ubuntu, where you have to get SDK separately from the Android Studio strange the path will work with Android Studio but with React Native, you'll need to create a file name <code>local.properties</code>.

For example inn <code>~/AwesomeProject/android</code> and insert this line: 
<code>sdk.dir=/path/to/sdk/in/your/computer</code>

blocks|key|5210367|text|从react项目的android文件夹中删除local.properties并试用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|5210368|我已经做到了这一点，并且成功了。|5210369|entityMap^0|9|7|M|G|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@$9|L|A|M|B|C]|$9|N|A|O|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|P|8|@]|E|@]|F|$]]|$1|I|3|-4|5|6|7|Q|8|@]|E|@]|F|$]]]|J|$]]

Delete the <code>local.properties</code> from the android folder in your react project and try it.

I've done this and succeeded.

blocks|key|1459946|text|在local.properties文件中检出：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1459947|sdk.dir=C\:\\Users\\USERNAME\\AppData\\Local\\Android\\sdk|code-block|syntax|javascript|1459948|格式是否正确|1459949|entityMap^0|1|G|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

Check out in your <code>local.properties</code> file:

<pre><code>sdk.dir=C\:\\Users\\USERNAME\\AppData\\Local\\Android\\sdk
</code></pre>

if the format is proper or not

blocks|key|1463908|text|如果您使用的是Ubuntu，只需转到您的react-native项目的android目录，创建一个名为local.properties的文件，并添加android+sdk路径，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1463909|sdk.dir+=+/home/[YOUR_USERNAME]/Android/Sdk|code-block|syntax|javascript|1463910|entityMap^0|1F|G|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

If you are using Ubuntu, just go to android directory of your react-native project and create a file called <code>local.properties</code> and add android sdk path to it as follow:

<pre><code>sdk.dir = /home/[YOUR_USERNAME]/Android/Sdk
</code></pre>

blocks|key|3793378|text|复制你系统的其他android项目local.properties并粘贴到React-native项目的android文件夹中就可以了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3793379|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Copy your system's other android project local.properties and paste in android folder of React-native project it will work.

blocks|key|1682425|text|这对我很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1682426|我在Udemy上上了Stephen+Grider的React+Native，其中一个学生在第50课上贴了这个。在命令行中逐字粘贴(当然没有'$‘)。|1682427|$+export+"ANDROID_HOME=/usr/local/opt/android-sdk"+>~/.bash_profile|code-block|syntax|javascript|1682428|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This worked for me .

I am taking Stephen Grider's React Native on Udemy and one of the students posted this in Lecture 50. Pasted verbatim in the command line (w/o '$' of course). 

<pre><code>$ export "ANDROID_HOME=/usr/local/opt/android-sdk" &gt;~/.bash_profile
</code></pre>

blocks|key|5209970|text|我能找到的最佳解决方案如下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5209971|5209972|Download+Android+Studio+and+SDK+of+your+choice+(即使你认为你不需要它，相信我，你会需要它来释放apk文件和一些手动修改的安卓代码)。|ordered-list-item|offset|length|5209973|文件>新建>导入，指向你的react本地安卓项目所在的位置。|5209974|如果它要求您下载任何特定的SDK，请下载相同的包。它可以要求你更新gradle等。请在需要的地方继续更新。|5209975|如果您有一个现有的Android+SDK，并且您知道该版本，那么您所要做的就是在您的android项目的build.gradle下匹配该版本。|5209976|5209977|下面是gradle文件的外观：|5209978|​|5209979|📷|atomic|5209980|5209981|如果你的机器设置一切顺利，你可以使用Android+Studio编译项目，那么没有什么可以阻止你通过react-native+cli+build+android命令构建你的应用程序。|5209982|使用这种方法，您不仅可以解决SDK的问题，还可以解决与Android开发的机器设置相关的许多问题。导入将自动查找SDK位置并创建local.properties。因此，您不需要担心手动干预。|5209983|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/studio/index.html|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/3ca3b25111e614775ea142fc74ad69ee.png|imageAlt^0|0|0|0|1A|0|0|0|0|0|0|0|0|0|1|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|1G|8|@]|9|@$F|1H|G|1I|1|1J]]|A|$]]|$1|H|3|I|5|E|7|1K|8|@]|9|@]|A|$]]|$1|J|3|K|5|E|7|1L|8|@]|9|@]|A|$]]|$1|L|3|M|5|E|7|1M|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1O|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1P|8|@]|9|@]|A|$]]|$1|S|3|T|5|U|7|1Q|8|@]|9|@$F|1R|G|1S|1|1T]]|A|$]]|$1|V|3|R|5|6|7|1U|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1V|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1W|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17]]|18|$5|19|14|1A|A|$1B|1C|1D|-4]]]]

The best solution I can find is as follows: 

<ol>
<li><a href="https://developer.android.com/studio/index.html" rel="nofollow noreferrer">Download Android Studio and SDK of your choice</a> (Even if you think you don't need it trust me that you would need it to release the apk file and some manual changes to the android code).</li>
<li>File > New > Import , point to the location where your react native android project is. </li>
<li>If it ask you to download any specific SDK then please download the same. It can ask you to update gradle etc... Please keep on updating where required. </li>
<li>If you have an existing Android SDK and you know the version then all you have to do is match that version under build.gradle of your android project.</li>
</ol>

This is how the gradle file will look like: 

<a href="https://i.stack.imgur.com/DI5FY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DI5FY.png" alt="enter image description here"></a>

If everything has gone well with your machine setup and you can compile the project using the Android Studio then nothing will stop you to build your app through react-native cli build android command.

With this approach, not only you will solve the problem of SDK, you will also resolve many issues related with your machine setup for Android development. The import will automatically find SDK location and create local.properties. Hence you don't need to worry about manual interventions.

blocks|key|3793424|text|适用于Linux用户的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3793425|你的应用没有获得android-sdk的路径，所以如果你使用的是linux+(ubuntu)，那么你需要添加一个名为"local.properties“的文件，并将其保存到android文件夹中，这个文件夹是在你的应用文件夹中创建的。|3793426|您需要在local.properties文件中添加以下行，这是您的android-sdk位于系统内部的路径，以便运行应用程序。|3793427|sdk.dir=/opt/android-sdk/|offset|length|style|CODE|3793428|保存并重新运行命令react-native+run-android|3793429|或|BOLD|3793430|你可以打开终端，输入|3793431|sudo+nano+~/.bashrc|3793432|并将下面的路径粘贴到文件的末尾|3793433|导出ANDROID_HOME="/opt/android-sdk/"|3793434|然后重新启动计算机，然后再次运行react-native+run-android。|3793435|注意：-如果您在.bashrc文件中设置了路径，那么您甚至不需要创建local.properties文件。|3793436|entityMap^0|0|0|0|0|P|0|0|0|1|0|0|0|J|0|0|0|Y|0|0|0|1H|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|16|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|17|8|@$H|18|I|19|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|1A|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1B|8|@$H|1C|I|1D|J|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1E|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1F|8|@$H|1G|I|1H|J|P]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1I|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1J|8|@$H|1K|I|1L|J|P]]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1M|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|1N|8|@$H|1O|I|1P|J|P]]|9|@]|A|$]]|$1|12|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]]|13|$]]

For Linux Users

Your app is not getting the path of android-sdk, so If you are using linux (ubuntu), than you need to add a file named "local.properties" and save it inside the android folder, which is created inside your app folder.

You need to add below line inside local.properties file, which is the path of your android-sdk lies inside your system inside system in order to run the app.

<code>sdk.dir=/opt/android-sdk/</code>

save and rerun the command react-native run-android

OR

you can open terminal, type

sudo nano ~/.bashrc

and paste the below path at the end of the file

export ANDROID_HOME="/opt/android-sdk/"

and restart your computer and run again react-native run-android after that.

Note:- If you put set path in .bashrc file, then you don't even need to create local.properties file.

blocks|key|5210222|text|如果创建并android+studio项目，您可以看到在项目根目录中创建了一个local.properties文件。当您创建react原生项目时，它不会为您创建该文件。所以你必须手动创建它。并且必须将skd目录添加到其中。因此，在android文件夹(在根目录下)中创建一个新文件。然后把你的sdk路径放在下面，记住：sdk.dir=D\:\\Android\\SDK\\android_sdk_studio+.+\sdk.dir=D\:\\Android\\SDK\\android_sdk_studio+.。就像上面一样。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|5210223|entityMap^0|5|E|13|G|4F|1B|5S|1B|5S|1J|0^^$0|@$1|2|3|4|5|6|7|I|8|@$9|J|A|K|B|C]|$9|L|A|M|B|C]|$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|D]]|E|@]|F|$]]|$1|G|3|-4|5|6|7|T|8|@]|E|@]|F|$]]]|H|$]]

If you create and <code>android studio</code> project, You can see a <code>local.properties</code> file is created inside your project root directory. When you create a react native project, It doesn't create that file for you. So you have to create it manually. And have to add skd dir to it. So create a new file inside android folder ( on root ). and put your sdk path like this 
<code>sdk.dir=D\:\\Android\\SDK\\android_sdk_studio .</code> 
Remember: remove single \ with double. Just like above.

blocks|key|3794261|text|如果缺少local.properties文件，只需在“项目/Android”文件夹中创建一个“sdk.dir=/Users/apple/Library/Android/+SDK”，并确保您的SDK位于该位置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3794262|要在mac上创建具有自定义扩展名的文件，请参阅以下链接|3794263|How+do+I+save+a+TextEdit+(mac)+file+with+a+custom+extension+(.sas)?|offset|length|3794264|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/23976219/how-do-i-save-a-textedit-mac-file-with-a-custom-extension-sas/57946817#57946817^0|0|0|0|1V|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

If local.properties file is missing,
 just create one in the "project/android" folder with 
 'sdk.dir=/Users/apple/Library/Android/sdk' and make sure your SDK in on that location.

for creating a file with custom extensions on mac refer the following link

<a href="https://stackoverflow.com/questions/23976219/how-do-i-save-a-textedit-mac-file-with-a-custom-extension-sas/57946817#57946817">How do I save a TextEdit (mac) file with a custom extension (.sas)?</a>

blocks|key|3794359|text|有两种方法可以解决这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3794360|3794361|简单地在安卓工作室中运行你的react原生安卓项目，它会自动在react原生安卓项目中生成你的local.properties文件。|ordered-list-item|3794362|a.转到React-native项目->安卓|3794363|3794364|b.创建文件local.properties|3794365|c.打开文件|3794366|d.将你的Android+SDK路径粘贴到下面|3794367|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

There are 2 ways to solve this issue:

<ol>
<li>Simple run your react native Android project in the android studio it will automatically generate your local.properties file in react native Android project.</li>
<li>a. Go to React-native Project -> Android 
b. Create a file local.properties 
c. Open the file 
d. Paste your Android SDK path like below</li>
</ol>

blocks|key|5209417|text|确保您安装了正确的模拟器和Android版本。这为我解决了问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5209418|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Make sure you have the proper emulator and Android version installed. That solved the problem for me.

blocks|key|1683118|text|在你的项目目录中有一个叫做"android“的文件夹，里面有一个local.properties文件。删除该文件，构建应该会成功运行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1683119|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In your Project Directory there is a folder called "android" and inside it there is the local.properties file .
Delete the file and the build should run successfully

blocks|key|1682775|text|有两个gradle文件，更改C:\myapp\android\build.gradle中的文件，而不是父目录myapp中的文件。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|1682776|将23.0.1替换为您在my+case+25.0.0中安装的Android构建工具版本|1682777|运行react-native+run-android在模拟器中查看您的应用程序。|1682778|entityMap^0|C|V|0|0|Q|0|2|O|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|K|$]]

There are two gradle files, change the one inside your C:\myapp\android\build.gradle and not in the parent directory myapp.

Replace 23.0.1 with your version of Android Build Tool installed in my case 25.0.0

Run react-native run-android to see your app in emulator.

blocks|key|1460080|text|复制你系统的其他android项目local.properties并粘贴到React-native项目的android文件夹中就可以了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1460081|sdk.dir=C\:\\Users\\paul\\AppData\\Local\\Android\\Sdk|code-block|syntax|javascript|1460082|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Copy your system's other android project local.properties and paste in android folder of React-native project it will work.

<pre><code>sdk.dir=C\:\\Users\\paul\\AppData\\Local\\Android\\Sdk
</code></pre>

blocks|key|5210052|text|只需打开由安卓工作室项目中的安卓文件夹。Android+studio创建必要的文件(local.properties)并下载运行android所需的SDK版本。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|5210053|entityMap^0|5|5|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Just open folder android in project by Android Studio.
Android studio create necessary file(local.properties) and download SDK version for run android needed.

blocks|key|1683223|text|我在Windows上，我不得不修改sdk路径，而不管它是否在path+env中。变量|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1683224|sdk.dir=C:/Users/MY_USERNAME/AppData/Local/Android/Sdk|code-block|syntax|javascript|1683225|已更改此文件：|1683226|MyProject\android\local.properties|1683227|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I am on Windows and I had to modify sdk path irrespective of having it in PATH env. variable

<pre><code>sdk.dir=C:/Users/MY_USERNAME/AppData/Local/Android/Sdk
</code></pre>

Changed this file: 

<pre><code>MyProject\android\local.properties
</code></pre>

blocks|key|3794306|text|问题是您错误地配置了环境变量。你必须(在Windows中)使用C:\Users\YOUR_USERNAME\AppData\Local\Android\Sdk的SDK|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3794307|欲了解更多信息，请访问：https://facebook.github.io/react-native/docs/getting-started|3794308|在第3点的Android开发环境部分中选择:+React+Native+CLI+Quickstart。配置ANDROID_HOME环境变量|3794309|如果你现在就这样做，你必须配置每个项目来使用你的环境变量，如果这个项目是在几个人之间使用他们的设备，这可能会导致问题。如果你按照我告诉你的那样做，你将不需要配置任何项目。|3794310|entityMap|0|LINK|mutability|MUTABLE|url|https://facebook.github.io/react-native/docs/getting-started^0|V|1C|0|C|1O|0|0|1H|C|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|H|3|I|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|13|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|S]]]]

The problem is that you have misconfigured the environment variables. You have to use (in Windows) the SDK of: <code>C:\Users\YOUR_USERNAME\AppData\Local\Android\Sdk</code>

For more information: <a href="https://facebook.github.io/react-native/docs/getting-started" rel="nofollow noreferrer">https://facebook.github.io/react-native/docs/getting-started</a>

Select: React Native CLI Quickstart in the Android development environment section in point 3. Configure the <code>ANDROID_HOME</code> environment variable

If you do it as you have it right now you must configure each project to use your environment variables and if the project is among several people with their equipment it can cause a problem. If you do it as I have told you, you will not have to configure any project.

blocks|key|3794346|text|如果您已经安装了android+Studio，只需使用Android+studio打开Project/android，系统会提示您切换工程中的位置路径。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3794347|entityMap^0|17|F|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

If you have android studio installed, simply open the <code>Project/android</code> using Android Studio, and it will notify you to switch the SDK location path in the project.

I have error when i start running android

<pre><code>What went wrong:
A problem occurred evaluating project ':app'. 
&gt; SDK location not found. Define location with sdk.dir in the local.properties file or with an ANDROID_HOME environment variable.
</code></pre>

React Native android build failed. SDK location not found

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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当我开始运行android时出现错误What went wrong:A problem occurred evaluating project ':app'.  > SDK location not found. Define location with sdk.dir in the local.properties file or with an ANDROID_HOME environment

问React Native android构建失败。找不到SDK位置
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