blocks|key|2870449|text|在启动活动的意图中，使用登录活动的会话id：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2870450|Intent+intent+=+new+Intent(getBaseContext(),+SignoutActivity.class);
intent.putExtra("EXTRA_SESSION_ID",+sessionId);
startActivity(intent)|code-block|syntax|javascript|2870451|看这个教程。|offset|length|2870452|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/guide/topics/intents/intents-filters.html^0|0|0|3|2|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Use the session id to the signout activity in the intent you're using to start the activity:

<pre><code>Intent intent = new Intent(getBaseContext(), SignoutActivity.class);
intent.putExtra("EXTRA_SESSION_ID", sessionId);
startActivity(intent)
</code></pre>

See this <a href="http://developer.android.com/guide/topics/intents/intents-filters.html" rel="nofollow">tutorial</a>.

blocks|key|2511654|text|Umesh显示了一个很好的技术，但我认为你想要相反的方向。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2511655|步骤1|offset|length|style|BOLD|2511656|启动活动2和3时，使用startActivityForResult。这允许您处理调用活动中的结果。|CODE|2511657|startActivityForResult(MY_REQUEST_ID);|code-block|syntax|javascript|2511658|步骤2|2511659|在活动2和3中，调用setResult(int,+Intent)返回一个值：|2511660|Intent+resultData+=+new+Intent();
resultData.putExtra("valueName",+"valueData");
setResult(Activity.RESULT_OK,+resultData);
finish();|2511661|步骤3|2511662|在调用活动中，实现onActivityResult并获取数据：|2511663|protected+void+onActivityResult(int+requestCode,+int+resultCode,
++++++++++Intent+data)+{
++++++if+(requestCode+==+MY_REQUEST_ID)+{
++++++++++if+(resultCode+==+RESULT_OK)+{
++++++++++++String+myValue+=+data.getStringExtra("valueName");+
++++++++++++//+use+'myValue'+return+value+here
++++++++++}
++++++}
}|2511664|编辑：|2511665|技术#2|2511666|是的，还可以通过向扩展Application的应用程序中添加类来使用全局应用程序状态，请参阅此StackOverflow+回答。|2511667|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/708012/android-how-to-declare-global-variables^0|0|0|3|0|B|M|0|0|0|3|0|A|M|0|0|0|3|0|9|G|0|0|0|3|0|0|4|0|B|B|1P|2|0|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1G|8|@$D|1H|E|1I|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1J|8|@$D|1K|E|1L|F|J]]|9|@]|A|$]]|$1|K|3|L|5|M|7|1M|8|@]|9|@]|A|$N|O]]|$1|P|3|Q|5|6|7|1N|8|@$D|1O|E|1P|F|G]]|9|@]|A|$]]|$1|R|3|S|5|6|7|1Q|8|@$D|1R|E|1S|F|J]]|9|@]|A|$]]|$1|T|3|U|5|M|7|1T|8|@]|9|@]|A|$N|O]]|$1|V|3|W|5|6|7|1U|8|@$D|1V|E|1W|F|G]]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1X|8|@$D|1Y|E|1Z|F|J]]|9|@]|A|$]]|$1|Z|3|10|5|M|7|20|8|@]|9|@]|A|$N|O]]|$1|11|3|12|5|6|7|21|8|@$D|22|E|23|F|G]]|9|@]|A|$]]|$1|13|3|14|5|6|7|24|8|@$D|25|E|26|F|G]]|9|@]|A|$]]|$1|15|3|16|5|6|7|27|8|@$D|28|E|29|F|J]]|9|@$D|2A|E|2B|1|2C]]|A|$]]|$1|17|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]]|18|$19|$5|1A|1B|1C|A|$1D|1E]]]]

Umesh shows a good technique but I think you want the opposite direction.

Step 1

When starting Activity 2 and 3, use <code>startActivityForResult</code>. This allows you handle the result in the calling activity.

<pre><code>startActivityForResult(MY_REQUEST_ID);
</code></pre>

Step 2

In Activities 2 and 3, call <code>setResult(int, Intent)</code> to return a value:

<pre><code>Intent resultData = new Intent();
resultData.putExtra("valueName", "valueData");
setResult(Activity.RESULT_OK, resultData);
finish();
</code></pre>

Step 3

In your calling activty, implement <code>onActivityResult</code> and get the data:

<pre><code>protected void onActivityResult(int requestCode, int resultCode,
 Intent data) {
 if (requestCode == MY_REQUEST_ID) {
 if (resultCode == RESULT_OK) {
 String myValue = data.getStringExtra("valueName"); 
 // use 'myValue' return value here
 }
 }
}
</code></pre>

Edit:

Technique #2

Yes, you can also use global application state by adding a class to your application that extends <code>Application</code>, see this StackOverflow <a href="https://stackoverflow.com/questions/708012/android-how-to-declare-global-variables">answer</a>

blocks|key|2511684|text|为什么还要费心遵循这样的结构..。如果三人回到一人呢？只需发送意图与您的数据从三到一，并相应地处理它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2511685|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|$]]

Why even bother following that kind of structure... if three returns to one? Just send an intent with your data from three to one and handle it accordingly.

blocks|key|2870543|text|从活动3到1发送意图需要一些触发器，比如按钮或onStop生命周期方法来发送它。最好用setResult方法自动发送结果。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2870544|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|$]]

Sending an Intent from activity 3 to 1 would require some trigger like a button or perhaps the onStop lifecycle method to send it. Better to have the result be automatically send with the setResult method.

blocks|key|2511730|text|还有其他技术，您可以调用startActivity(new+Intent(getApplicationContext(),Activity1.class))方法和Bundle类将数据从activity3传输到activity1。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2511731|entityMap^0|C|1U|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|$]]

Also there is other technique, you can call <code>startActivity(new Intent(getApplicationContext(),Activity1.class))</code> method along with the Bundle class to transfer data from activity3 to activity1.

blocks|key|2870596|text|在Android上，可以启动另一个具有指定包名的应用程序，将一个参数传递给它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2870597|public+static+void+launchApp(Context+context,+String+packageName)+{
++++Intent+intent+=+context.getPackageManager().getLaunchIntentForPackage(packageName);

++++if(intent+==+null)+{
++++++++intent+=+new+Intent(Intent.ACTION_VIEW,+Uri.parse("market://details?id="+%2B+packageName));
++++}
++++intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
++++intent.putExtra(Intent.EXTRA_TEXT,+"*argument+to+send*");
++++context.startActivity(intent);
}|code-block|syntax|javascript|2870598|下面的代码可以用于检索目标应用程序中的参数。|2870599|public+static+String+getArgument(Activity+activity)+{
++++return+activity.getIntent().getStringExtra(Intent.EXTRA_TEXT);
}|2870600|只需要对活动的引用，这在Unity中是有用的，因为它对子类活动很混乱。|2870601|entityMap^0|W|2|0|0|J|2|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|10|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|R|$]]

On Android it is possible to launch another app of a specified package name, passing an argument to it.

<pre><code>public static void launchApp(Context context, String packageName) {
 Intent intent = context.getPackageManager().getLaunchIntentForPackage(packageName);

 if(intent == null) {
 intent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + packageName));
 }
 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 intent.putExtra(Intent.EXTRA_TEXT, "*argument to send*");
 context.startActivity(intent);
}
</code></pre>

The code below can be used to retrieve the argument in the target app.

<pre><code>public static String getArgument(Activity activity) {
 return activity.getIntent().getStringExtra(Intent.EXTRA_TEXT);
}
</code></pre>

Only a reference to Activity is needed, this is useful in Unity where it is messy to subclass Activity.

This is the navigation of my application:

<blockquote>
 <code>Activity1</code> calls <code>Activity2</code> &rarr; <code>Activity2.finish()</code>, call <code>Activity3</code> &rarr; <code>Activity3.finish()</code>
</blockquote>

When <code>Activity3</code> finishes, it calls the <code>onResume</code> method of <code>Activity1</code>. Now how can I pass a value from <code>Activity3</code> to <code>Activity1</code>?

How can I pass values between Activities on Android?

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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这是我的应用程序的导航：Activity1调用Activity2→Activity2.finish()，调用Activity3→Activity3.finish()当Activity3完成时，它调用Activity1的onResume方法。现在我如何将一个值从Activity3传递给Activity1

问如何在Android上的活动之间传递值？
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问如何在Android上的活动之间传递值？EN