blocks|key|179432|text|您的Android+Studio设置为在同一窗口中打开项目。你可以改变这一点，这样它就会询问是否在打开其他项目时打开新窗口。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|179433|执行此操作：|offset|length|style|BOLD|179434|179435|转到:文件->设置->外观和行为->系统设置->项目打开。|ordered-list-item|179436|选中x“确认窗口以在中打开项目”。|179437|现在使用文件->打开...打开另一个(第2)项目。|179438|现在将询问您是否要打开新窗口或替换已有的窗口。选择新建窗口。|179439|179440|179441|Screenshots:|179442|​|179443|📷|atomic|179444|179445|179446|179447|179448|179449|旧版本：|179450|179451|转到“设置”“->常规”“->项目打开”。|179452|选中‘确认窗口以在其中打开项目’。|179453|创建或打开不同的项目|179454|系统将询问您是否打开新窗口。|179455|179456|179457|179458|179459|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/67548efc76d0a55c93403712776dca10.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/f67f035f94d7b206dcef36bd232bb8f4.png|2|https://ask.qcloudimg.com/http-save/yehe-900000/98fe39bc573e4f3a90097d4e35397c28.png^0|0|0|6|0|0|0|0|0|0|0|0|0|C|0|0|0|1|0|0|0|0|0|1|1|0|0|0|0|4|0|0|0|0|0|0|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|1X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1Y|8|@$D|1Z|E|20|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|21|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|22|8|@]|9|@]|A|$]]|$1|L|3|M|5|K|7|23|8|@]|9|@]|A|$]]|$1|N|3|O|5|K|7|24|8|@]|9|@]|A|$]]|$1|P|3|Q|5|K|7|25|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|26|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|27|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|28|8|@$D|29|E|2A|F|G]]|9|@]|A|$]]|$1|V|3|W|5|6|7|2B|8|@]|9|@]|A|$]]|$1|X|3|Y|5|Z|7|2C|8|@]|9|@$D|2D|E|2E|1|2F]]|A|$]]|$1|10|3|W|5|6|7|2G|8|@]|9|@]|A|$]]|$1|11|3|W|5|6|7|2H|8|@]|9|@]|A|$]]|$1|12|3|Y|5|Z|7|2I|8|@]|9|@$D|2J|E|2K|1|2L]]|A|$]]|$1|13|3|W|5|6|7|2M|8|@]|9|@]|A|$]]|$1|14|3|-4|5|6|7|2N|8|@]|9|@]|A|$]]|$1|15|3|16|5|6|7|2O|8|@$D|2P|E|2Q|F|G]]|9|@]|A|$]]|$1|17|3|-4|5|6|7|2R|8|@]|9|@]|A|$]]|$1|18|3|19|5|K|7|2S|8|@]|9|@]|A|$]]|$1|1A|3|1B|5|K|7|2T|8|@]|9|@]|A|$]]|$1|1C|3|1D|5|K|7|2U|8|@]|9|@]|A|$]]|$1|1E|3|1F|5|K|7|2V|8|@]|9|@]|A|$]]|$1|1G|3|-4|5|6|7|2W|8|@]|9|@]|A|$]]|$1|1H|3|W|5|6|7|2X|8|@]|9|@]|A|$]]|$1|1I|3|Y|5|Z|7|2Y|8|@]|9|@$D|2Z|E|30|1|31]]|A|$]]|$1|1J|3|W|5|6|7|32|8|@]|9|@]|A|$]]|$1|1K|3|-4|5|6|7|33|8|@]|9|@]|A|$]]]|1L|$1M|$5|1N|1O|1P|A|$1Q|1R|1S|-4]]|1T|$5|1N|1O|1P|A|$1Q|1U|1S|-4]]|1V|$5|1N|1O|1P|A|$1Q|1W|1S|-4]]]]

Your Android Studio was set to open project in the same window. You can change that, so it asks whether to open new window while opening other project.

Do this:

<ol>
<li>Go to: File -> Settings -> Appearance &amp; Behavior -> System Settings -> Project Opening.</li>
<li>Check [x] "Confirm window to open project in".</li>
<li>Now open the other (2nd) project with File -> Open... etc.</li>
<li>You will now be asked if you want to open a new window or replace what you already have. Select New Window.</li>
</ol>

<hr>

Screenshots:

<img src="https://i.stack.imgur.com/pViVu.png" alt="settings">

<a href="https://i.stack.imgur.com/LmfRe.png" rel="noreferrer"><img src="https://i.stack.imgur.com/LmfRe.png" alt="what to open"></a>

<hr>

Older versions:

<ol>
<li>Go to Settings -> General -> Project opening. </li>
<li>Check 'Confirm window to open project in'.</li>
<li>Create or open different project </li>
<li>You will be asked if open a new window.</li>
</ol>

<img src="https://i.stack.imgur.com/yAV2a.png" alt="enter image description here">

blocks|key|2789088|text|Android+studio中有一个更新，所以新的解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2789089|2789090|转到>文件|ordered-list-item|2789091|转到>设置和行为|2789092|转到>外观和行为|2789093|转到>系统设置|2789094|H19现在在系统设置中选中“确认在E211中打开项目”选项|offset|length|style|BOLD|2789095|entityMap^0|0|0|0|0|0|0|D|G|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|V|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|X|8|@]|9|@]|A|$]]|$1|J|3|K|5|E|7|Y|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@$N|10|O|11|P|Q]]|9|@]|A|$]]|$1|R|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|S|$]]

There was an update in Android studio so the new solution would be:

<ol>
<li>go to >file</li>
<li>go to >settings</li>
<li>go to >appearance and behavior</li>
<li>go to > system settings</li>
<li>now in system settings check the "confirm to open project in" option</li>
</ol>

blocks|key|3001509|text|在Mac上是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3001510|3001511|安卓Studio|ordered-list-item|3001512|Preferences|3001513|Appearance+&+Behavior|3001514|System设置->项目打开->确认在|3001515|中打开项目|3001516|当您打开其他项目时，系统将询问您是否要打开新窗口或替换现有窗口。|3001517|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|S|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|T|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|U|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|V|8|@]|9|@]|A|$]]|$1|J|3|K|5|E|7|W|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|X|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|Y|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|Q|$]]

On Mac is:

<ol>
<li>Android Studio</li>
<li>Preferences</li>
<li>Appearance &amp; Behavior</li>
<li>System Settings -> Project Opening -> Confirm to open project in</li>
</ol>

When you open other project, you will be asked if you want to open a new window or replace what you already have.

How do I run multiple instances of Android Studio? A second instance is launched if you select "File\New Project", but "File\Open" and "File\Reopen" does not create a second instance.

How do I run multiple instances of Android Studio

Android Studio

Android

如何运行Android Studio的多个实例？如果您选择"File\New Project"，则会启动第二个实例，但"File\Open“和"File\Reopen”不会创建第二个实例。

问如何运行Android Studio的多个实例
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