blocks|key|3046394|text|请阅读以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3046395|3046396|Return+result+to+onActivityResult()|ordered-list-item|offset|length|3046397|Fetching+Result+from+a+called+activity+-+Android+Tutorial+for+Beginners|3046398|3046399|这些文章将帮助您理解如何在Android中的两个活动之间传递数据。|3046400|entityMap|0|LINK|mutability|MUTABLE|url|http://android-er.blogspot.in/2011/08/return-result-to-onactivityresult.html|1|http://saigeethamn.blogspot.in/2009/08/android-developer-tutorial-for_31.html^0|0|0|0|Z|0|0|0|1Z|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|X|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|Y|8|@]|9|@$F|Z|G|10|1|11]]|A|$]]|$1|H|3|I|5|E|7|12|8|@]|9|@$F|13|G|14|1|15]]|A|$]]|$1|J|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|17|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]]]

Read these:

<ol>
<li><a href="http://android-er.blogspot.in/2011/08/return-result-to-onactivityresult.html" rel="nofollow">Return result to onActivityResult()</a></li>
<li><a href="http://saigeethamn.blogspot.in/2009/08/android-developer-tutorial-for_31.html" rel="nofollow">Fetching Result from a called activity - Android Tutorial for Beginners</a></li>
</ol>

These articles will help you understand how to pass data between two activities in Android.

blocks|key|204053|text|Activity1应使用startActivityForResult()启动Activity2。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|204054|Activity2应使用setResult()将数据发送回Activity1。|204055|在Activity2中，|204056|@Override
public+void+onBackPressed()+{
++++String+data+=+mEditText.getText();
++++Intent+intent+=+new+Intent();
++++intent.putExtra("MyData",+data);
++++setResult(resultcode,+intent);
}|code-block|syntax|javascript|204057|在Activity1中，|204058|onActivityResult(int+requestCode,+int+resultCode,+Intent+data)+{
++++if+(requestCode+==+1)+{
++++++++if(resultCode+==+RESULT_OK)+{
++++++++++++String+myStr=data.getStringExtra("MyData");
++++++++++++mTextView.setText(myStr);
++++++++}
++++}
}|204059|entityMap^0|0|9|12|9|C|O|0|0|9|T|9|C|B|0|1|9|0|0|1|9|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|D]]|E|@]|F|$]]|$1|G|3|H|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|I|3|J|5|6|7|19|8|@$9|1A|A|1B|B|C]]|E|@]|F|$]]|$1|K|3|L|5|M|7|1C|8|@]|E|@]|F|$N|O]]|$1|P|3|Q|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|E|@]|F|$]]|$1|R|3|S|5|M|7|1G|8|@]|E|@]|F|$N|O]]|$1|T|3|-4|5|6|7|1H|8|@]|E|@]|F|$]]]|U|$]]

Activity1 should start Activity2 with <code>startActivityForResult()</code>.

Activity2 should use <code>setResult()</code> to send data back to Activity1. 

In Activity2,

<pre><code>@Override
public void onBackPressed() {
 String data = mEditText.getText();
 Intent intent = new Intent();
 intent.putExtra("MyData", data);
 setResult(resultcode, intent);
}
</code></pre>

In Activity1,

<pre><code>onActivityResult(int requestCode, int resultCode, Intent data) {
 if (requestCode == 1) {
 if(resultCode == RESULT_OK) {
 String myStr=data.getStringExtra("MyData");
 mTextView.setText(myStr);
 }
 }
}
</code></pre>

blocks|key|2833774|text|使用startActivityForResult启动Activity2，并使用setResult方法将数据从Activity2发送回Activity1。在Activity1中，您需要覆盖onActivityResult，以便使用Activity2中的EditText数据更新TextView。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2833775|例如：|2833776|在Activity1中，以以下方式启动Activity2：|BOLD|2833777|Intent+i+=+new+Intent(this,+Activity2.class);
startActivityForResult(i,+1);|code-block|syntax|javascript|2833778|在Activity2中，使用setResult发回数据：|2833779|Intent+intent+=+new+Intent();
intent.putExtra("editTextValue",+"value_here")
setResult(RESULT_OK,+intent);++++++++
finish();|2833780|在Activity1中，使用onActivityResult接收数据|2833781|public+void+onActivityResult(int+requestCode,+int+resultCode,+Intent+data)+{
++++super.onActivityResult(requestCode,+resultCode,+data);
++++if+(requestCode+==+1)+{
+++++++++if(resultCode+==+RESULT_OK)+{
+++++++++++++String+strEditText+=+data.getStringExtra("editTextValue");
+++++++++}+++++
++++}
}+|2833782|如果可以，还可以使用SharedPreferences在活动之间共享数据。|2833783|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/app/Activity.html#startActivityForResult%2528android.content.Intent,%2520int%2529|1|http://developer.android.com/reference/android/content/SharedPreferences.html^0|2|M|13|9|2L|G|3H|8|3T|8|2|M|0|0|0|1|9|0|0|1|9|E|9|0|0|1|9|E|G|0|0|A|H|1|0^^$0|@$1|2|3|4|5|6|7|19|8|@$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]]|D|@$9|1K|A|1L|1|1M]]|E|$]]|$1|F|3|G|5|6|7|1N|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1O|8|@$9|1P|A|1Q|B|J]]|D|@]|E|$]]|$1|K|3|L|5|M|7|1R|8|@]|D|@]|E|$N|O]]|$1|P|3|Q|5|6|7|1S|8|@$9|1T|A|1U|B|J]|$9|1V|A|1W|B|C]]|D|@]|E|$]]|$1|R|3|S|5|M|7|1X|8|@]|D|@]|E|$N|O]]|$1|T|3|U|5|6|7|1Y|8|@$9|1Z|A|20|B|J]|$9|21|A|22|B|C]]|D|@]|E|$]]|$1|V|3|W|5|M|7|23|8|@]|D|@]|E|$N|O]]|$1|X|3|Y|5|6|7|24|8|@]|D|@$9|25|A|26|1|27]]|E|$]]|$1|Z|3|-4|5|6|7|28|8|@]|D|@]|E|$]]]|10|$11|$5|12|13|14|E|$15|16]]|17|$5|12|13|14|E|$15|18]]]]

Start Activity2 with <a href="http://developer.android.com/reference/android/app/Activity.html#startActivityForResult%28android.content.Intent,%20int%29" rel="noreferrer"><code>startActivityForResult</code></a> and use <code>setResult</code> method for sending data back from Activity2 to Activity1. In Activity1 you will need to override <code>onActivityResult</code> for updating <code>TextView</code> with <code>EditText</code> data from Activity2.

For example:

In Activity1, start Activity2 as:

<pre><code>Intent i = new Intent(this, Activity2.class);
startActivityForResult(i, 1);
</code></pre>

In Activity2, use <code>setResult</code> for sending data back:

<pre><code>Intent intent = new Intent();
intent.putExtra("editTextValue", "value_here")
setResult(RESULT_OK, intent); 
finish();
</code></pre>

And in Activity1, receive data with <code>onActivityResult</code>:

<pre><code>public void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 if (requestCode == 1) {
 if(resultCode == RESULT_OK) {
 String strEditText = data.getStringExtra("editTextValue");
 } 
 }
} 
</code></pre>

If you can, also use <a href="http://developer.android.com/reference/android/content/SharedPreferences.html" rel="noreferrer">SharedPreferences</a> for sharing data between Activities.

blocks|key|3046499|text|TL;DR使用Activity.startActivityForResult|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3046500|长篇答案：|BOLD|3046501|您应该从阅读Android开发人员文档开始。具体而言，Activity文档的Starting+Activities+and+Getting+Results部分涵盖了您的问题主题。|3046502|作为示例代码，Android+SDK提供了很好的示例。此外，这里的其他答案还提供了一些简短的示例代码片段供您使用。|3046503|但是，如果您正在寻找替代方案，请阅读this+SO+question。这是关于如何在片段中使用startActivityForResults的一个很好的讨论，以及一些在活动之间传递数据的方法。|3046504|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/app/Activity.html#startActivityForResult%2528android.content.Intent,%2520int%2529|1|http://developer.android.com/reference/android/app/Activity.html#StartingActivities|2|https://stackoverflow.com/questions/7796625/alternatives-to-startactivityforresult^0|7|V|7|V|0|0|0|5|0|R|8|12|13|12|13|1|0|0|1B|N|I|G|2|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|6|7|16|8|@$9|17|A|18|B|H]]|D|@]|E|$]]|$1|I|3|J|5|6|7|19|8|@$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]]|D|@$9|1E|A|1F|1|1G]]|E|$]]|$1|K|3|L|5|6|7|1H|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1I|8|@$9|1J|A|1K|B|C]]|D|@$9|1L|A|1M|1|1N]]|E|$]]|$1|O|3|-4|5|6|7|1O|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]|W|$5|R|S|T|E|$U|X]]|Y|$5|R|S|T|E|$U|Z]]]]

TL;DR Use <a href="http://developer.android.com/reference/android/app/Activity.html#startActivityForResult%28android.content.Intent,%20int%29" rel="nofollow noreferrer"><code>Activity.startActivityForResult</code></a>

Long answer:

You should start by reading the Android developer documentation. Specifically the topic of your question is covered in the <a href="http://developer.android.com/reference/android/app/Activity.html#StartingActivities" rel="nofollow noreferrer"><code>Starting Activities and Getting Results</code></a> section of the <code>Activity</code> documentation.

As for example code, the Android SDK provides good examples. Also, other answers here give you short snippets of sample code to use.

However, if you are looking for alternatives, read <a href="https://stackoverflow.com/questions/7796625/alternatives-to-startactivityforresult">this SO question</a>. This is a good discussion on how to use <code>startActivityForResults</code> with fragments, as well as couple othe approaches for passing data between activities.

blocks|key|202409|text|这是您的第一个Activity1。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|202410|public+class+Activity1+extends+Activity{
private+int+mRequestCode+=+100;

@Override
protected+void+onCreate(Bundle+savedInstanceState)+{
++++super.onCreate(savedInstanceState);

++++Intent+intent+=+new+Intent(this,+Activity2.class);
++++startActivityForResult(intent,+mRequestCode);
}

@Override
protected+void+onActivityResult(int+requestCode,+int+resultCode,+Intent+data)+{
++++super.onActivityResult(requestCode,+resultCode,+data);
++++if(requestCode+==+mRequestCode+&&+resultCode+==+RESULT_OK){
++++++++String+editTextString+=+data.getStringExtra("editText");
++++}
}
}|code-block|syntax|javascript|202411|从这里开始，您可以使用startActivityForResult(mRequestCode，Activity2.class);启动Activity2.class|offset|length|style|BOLD|202412|现在这是你的第二个活动，名字是Activity2|202413|public+class+Activity2+extends+Activity+{
private+EditText+mEditText;

@Override
protected+void+onCreate(Bundle+savedInstanceState)+{
++++super.onCreate(savedInstanceState);

++++//mEditText+=+(EditText)findViewById(R.id.edit_text);

++++Intent+intent+=+new+Intent();
++++intent.putExtra("editText",+mEditText.getText().toString());
++++setResult(RESULT_OK,+intent);
}

}|202414|现在，当你完成你的第二个活动，然后你调用setResult()方法，从onBackPress()或从任何按钮点击，当你的Activity2将销毁时，然后你的Activity1的回调方法onActivityResult()将从那里调用，你可以从那里获得你的数据。|202415|希望对您有帮助...：)|202416|entityMap^0|0|0|B|1H|0|0|0|2K|I|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|13|8|@$I|14|J|15|K|L]]|9|@]|A|$]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|V|$]]

this is your first Activity1.

<pre><code>public class Activity1 extends Activity{
private int mRequestCode = 100;

@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);

 Intent intent = new Intent(this, Activity2.class);
 startActivityForResult(intent, mRequestCode);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 if(requestCode == mRequestCode &amp;&amp; resultCode == RESULT_OK){
 String editTextString = data.getStringExtra("editText");
 }
}
}
</code></pre>

From here you are starting your Activity2.class by using startActivityForResult(mRequestCode, Activity2.class);

Now this is your second Activity, name is Activity2

<pre><code>public class Activity2 extends Activity {
private EditText mEditText;

@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);

 //mEditText = (EditText)findViewById(R.id.edit_text);

 Intent intent = new Intent();
 intent.putExtra("editText", mEditText.getText().toString());
 setResult(RESULT_OK, intent);
}

}
</code></pre>

Now when you done with your second Activity then you call setResult() method, from onBackPress() or from any button click when your Activity2 will destroy then your Activity1's call back method onActivityResult() will call from there you can get your data from intent..

Hope it will help to you...:)

blocks|key|204137|text|将其作为startActivityforResult.But的替代方法，请记住，对于这种情况，这种方法在性能方面可能很昂贵，但在某些情况下，您可能需要使用这种方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|204138|Activity2中的，|offset|length|style|BOLD|204139|@Override
public+void+onBackPressed()+{
String+data+=+mEditText.getText();
SharedPreferences+sp+=+getSharedPreferences("LoginInfos",+0);
Editor+editor+=+sp.edit();
editor.putString("email",data);
editor.commit();
}|code-block|syntax|javascript|204140|Activity1中的，|204141|+@Override
public+void+onResume()+{
SharedPreferences+sp+=+getSharedPreferences("LoginInfos",+0);
String++dataFromOtherAct=+sp.getString("email",+"no+email");
}+|204142|entityMap^0|0|B|1|0|0|B|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

Take This as an alternate to startActivityforResult.But keep in mind that for such cases this approach can be expensive in terms of performance but in some cases you might need to use. 

In Activity2, 

<pre><code>@Override
public void onBackPressed() {
String data = mEditText.getText();
SharedPreferences sp = getSharedPreferences("LoginInfos", 0);
Editor editor = sp.edit();
editor.putString("email",data);
editor.commit();
}
</code></pre>

In Activity1, 

<pre><code> @Override
public void onResume() {
SharedPreferences sp = getSharedPreferences("LoginInfos", 0);
String dataFromOtherAct= sp.getString("email", "no email");
} 
</code></pre>

blocks|key|2833961|text|当我将setResult放在onBackPressed中时，其他答案都不起作用。注释调用超级onBackPressed并手动调用finish解决了这个问题：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2833962|@Override
public+void+onBackPressed()+{
++++//super.onBackPressed();
++++Intent+i+=+new+Intent();
++++i.putExtra(EXTRA_NON_DOWNLOADED_PAGES,+notDownloaded);
++++setResult(RESULT_OK,+i);
++++finish();
}|code-block|syntax|javascript|2833963|在第一个活动中：|2833964|@Override
protected+void+onActivityResult(int+requestCode,+int+resultCode,+Intent+data)+{
++++super.onActivityResult(requestCode,+resultCode,+data);
++++if+(requestCode+==+QUEUE_MSG)+{
++++++++if+(resultCode+==+RESULT_OK)+{
++++++++++++Serializable+tmp+=+data.getSerializableExtra(MainActivity.EXTRA_NON_DOWNLOADED_PAGES);
++++++++++++if+(tmp+!=+null)
++++++++++++++++serializable+=+tmp;
++++++++}
++++}
}|2833965|entityMap^0|3|9|E|D|1A|D|1S|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|P|$]]

Other answers were not working when I put <code>setResult</code> in <code>onBackPressed</code>. Commenting call to super <code>onBackPressed</code> and calling <code>finish</code> manually solves the problem:

<pre><code>@Override
public void onBackPressed() {
 //super.onBackPressed();
 Intent i = new Intent();
 i.putExtra(EXTRA_NON_DOWNLOADED_PAGES, notDownloaded);
 setResult(RESULT_OK, i);
 finish();
}
</code></pre>

And in first activity:

<pre><code>@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 if (requestCode == QUEUE_MSG) {
 if (resultCode == RESULT_OK) {
 Serializable tmp = data.getSerializableExtra(MainActivity.EXTRA_NON_DOWNLOADED_PAGES);
 if (tmp != null)
 serializable = tmp;
 }
 }
}
</code></pre>

blocks|key|2833995|text|在您的FirstActivity中，使用startActivityForResult()方法调用SecondActivity。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2833996|例如：|2833997|Intent+i+=+new+Intent(this,+SecondActivity.class);
startActivityForResult(i,+1);|code-block|syntax|javascript|2833998|在您的SecondActivity中设置要返回给FirstActivity的数据。如果你不想返回，不要设置任何。|2833999|例如:在secondActivity中，如果你想发回数据：|2834000|Intent+returnIntent+=+new+Intent();
returnIntent.putExtra("result",result);
setResult(Activity.RESULT_OK,returnIntent);
finish();|2834001|如果您不想返回数据：|2834002|Intent+returnIntent+=+new+Intent();
setResult(Activity.RESULT_CANCELED,+returnIntent);
finish();|2834003|现在，在您的FirstActivity类中为onActivityResult()方法编写以下代码。|2834004|@Override
protected+void+onActivityResult(int+requestCode,+int+resultCode,+Intent+data)+{
++++if+(requestCode+==+1)+{
++++++++if(resultCode+==+Activity.RESULT_OK){
++++++++++++String+result=data.getStringExtra("result");
++++++++}
++++++++if+(resultCode+==+Activity.RESULT_CANCELED)+{
++++++++++++//Write+your+code+if+there's+no+result
++++++++}
++++}
}|2834005|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|F|7|13|8|@]|9|@]|A|$G|H]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|15|8|@]|9|@]|A|$G|H]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|V|5|F|7|17|8|@]|9|@]|A|$G|H]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

From your FirstActivity call the SecondActivity using startActivityForResult() method.

For example:

<pre><code>Intent i = new Intent(this, SecondActivity.class);
startActivityForResult(i, 1);
</code></pre>

In your SecondActivity set the data which you want to return back to FirstActivity. If you don't want to return back, don't set any.

For example: In secondActivity if you want to send back data:

<pre><code>Intent returnIntent = new Intent();
returnIntent.putExtra("result",result);
setResult(Activity.RESULT_OK,returnIntent);
finish();
</code></pre>

If you don't want to return data:

<pre><code>Intent returnIntent = new Intent();
setResult(Activity.RESULT_CANCELED, returnIntent);
finish();
</code></pre>

Now in your FirstActivity class write following code for the onActivityResult() method.

<pre><code>@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 if (requestCode == 1) {
 if(resultCode == Activity.RESULT_OK){
 String result=data.getStringExtra("result");
 }
 if (resultCode == Activity.RESULT_CANCELED) {
 //Write your code if there's no result
 }
 }
}
</code></pre>

blocks|key|199555|text|我有一个问题，我想在我做的软按钮和每个安卓设备上默认的softKey中发送数据类型，所以我做了这个，首先我在我的"A“Activity中做了一个Intent|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|199556|++++++++++++Intent+intent+=+new+Intent();
++++++++++++intent.setClass(context,+_AddNewEmployee.class);
++++++++++++intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
++++++++++++startActivityForResult(intent,+6969);
++++++++++++setResult(60);|code-block|syntax|javascript|199557|然后在我的第二个活动中，我在"B“Activity中声明了一个字段|199558|private+static+int+resultCode+=+40;|199559|然后，在我成功地发出请求之后，或者每当我想告诉"A“活动这项工作在这里成功完成时，将resultCode的值更改为我在"A”Activity中所说的值，在我的例子中是"60“，然后：|199560|private+void+backToSearchActivityAndRequest()+{
++++Intent+data+=+new+Intent();
++++data.putExtra("PhoneNumber",+employeePhoneNumber);
++++setResult(resultCode,+data);
++++finish();
}

@Override
public+void+onBackPressed()+{
++++backToSearchActivityAndRequest();
}|199561|PS:如果你想让这个方法正常工作，记得从onBackPressed方法中移除Super。|199562|然后我也应该在我的"A“活动中调用onActivityResult方法：|199563|+++@Override
++++protected+void+onActivityResult(int+requestCode,+int+resultCode,+Intent+data)+{
++++++++super.onActivityResult(requestCode,+resultCode,+data);
++++++++if+(requestCode+==+6969+&&+resultCode+==+60)+{
++++++++++++if+(data+!=+null)+{
++++++++++++++++++++user_mobile+=+data.getStringExtra("PhoneNumber");
++++++++++++++++++++numberTextField.setText(user_mobile);
++++++++++++++++++++getEmployeeByNumber();
++++++++++++}
++++++++}
++++}|199564|就是这样，希望它能帮到你。#HappyCoding|199565|entityMap^0|1N|8|20|6|0|0|H|8|0|0|1Q|8|0|0|12|5|0|H|G|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|1B|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1C|8|@$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|H|7|1F|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|1G|8|@$9|1H|A|1I|B|C]]|D|@]|E|$]]|$1|U|3|V|5|6|7|1J|8|@$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|W|3|X|5|H|7|1M|8|@]|D|@]|E|$I|J]]|$1|Y|3|Z|5|6|7|1N|8|@]|D|@]|E|$]]|$1|10|3|-4|5|6|7|1O|8|@]|D|@]|E|$]]]|11|$]]

and I Have an issue which I wanted to do this sending data type in a Soft Button which I'd made and the softKey which is the default in every Android Device, so I've done this, first I've made an <code>Intent</code> in my "A" <code>Activity</code>:

<pre><code> Intent intent = new Intent();
 intent.setClass(context, _AddNewEmployee.class);
 intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
 startActivityForResult(intent, 6969);
 setResult(60);
</code></pre>

Then in my second Activity, I've declared a Field in my "B" <code>Activity</code>:

<pre><code>private static int resultCode = 40;
</code></pre>

then after I made my request successfully or whenever I wanted to tell the "A" Activity that this job is successfully done here change the value of resultCode to the same I've said in "A" <code>Activity</code> which in my case is "60" and then:

<pre><code>private void backToSearchActivityAndRequest() {
 Intent data = new Intent();
 data.putExtra("PhoneNumber", employeePhoneNumber);
 setResult(resultCode, data);
 finish();
}

@Override
public void onBackPressed() {
 backToSearchActivityAndRequest();
}
</code></pre>

PS: Remember to remove the <code>Super</code> from the onBackPressed Method if you want this to work properly.

then I should call the <code>onActivityResult</code> Method in my "A" Activity as well:

<pre><code> @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 if (requestCode == 6969 &amp;&amp; resultCode == 60) {
 if (data != null) {
 user_mobile = data.getStringExtra("PhoneNumber");
 numberTextField.setText(user_mobile);
 getEmployeeByNumber();
 }
 }
 }
</code></pre>

that's it, hope it helps you out. #HappyCoding;

blocks|key|202470|text|java中的新更新后的2021：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|202471|对于MainActivity中的instead+()，请使用activityresultlauncher()而不是startactivity.|202472|ActivityResultLauncher<Intent>+activityResultLaunch+=+registerForActivityResult(
++++++++new+ActivityResultContracts.StartActivityForResult(),
++++++++new+ActivityResultCallback<ActivityResult>()+{
++++++++++++@Override
++++++++++++public+void+onActivityResult(ActivityResult+result)+{
++++++++++++++++if+(result.getResultCode()+==+123)+{
++++++++++++++++++++Intent+data+=+result.getData();
++++++++++++++++++++String+myStr+=+data.getStringExtra("MyData");

++++++++++++++++++++if+(!TextUtils.isEmpty(myStr+))+{
++++++++++++++++++++++++myTextView.setText(myStr);
++++++++++++++++++++}

++++++++++++++++}
++++++++++++}
++++++++});|code-block|syntax|javascript|202473|在onCreate()内部：|202474|myBtn.setOnClickListener(new+View.OnClickListener()+{
++++++++@Override
++++++++public+void+onClick(View+v)+{
++++++++++++Intent+intent+=+new+Intent(MainActivity.this,+Second.class);
++++++++++++activityResultLaunch.launch(intent);
++++++++}
++++});|202475|在SecondActivity内部(onCreate外部)：|202476|@Override
public+void+onBackPressed()+{
++++String+data+=+myEditText.getText().toString();
++++Intent+intent+=+new+Intent();
++++intent.putExtra("MyData",+data);
++++setResult(123,+intent);
++++finish();
}|202477|entityMap^0|B|5|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|11|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|13|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|U|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|V|$]]

2021 After the new update in java:
Use activityresultlauncher() instead of startactivityforresult() in the MainActivity.
<pre><code>ActivityResultLauncher&lt;Intent&gt; activityResultLaunch = registerForActivityResult(
 new ActivityResultContracts.StartActivityForResult(),
 new ActivityResultCallback&lt;ActivityResult&gt;() {
 @Override
 public void onActivityResult(ActivityResult result) {
 if (result.getResultCode() == 123) {
 Intent data = result.getData();
 String myStr = data.getStringExtra(&quot;MyData&quot;);

 if (!TextUtils.isEmpty(myStr )) {
 myTextView.setText(myStr);
 }

 }
 }
 });
</code></pre>
Inside onCreate():
<pre><code>myBtn.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 Intent intent = new Intent(MainActivity.this, Second.class);
 activityResultLaunch.launch(intent);
 }
 });
</code></pre>
Inside the SecondActivity (outside onCreate):
<pre><code>@Override
public void onBackPressed() {
 String data = myEditText.getText().toString();
 Intent intent = new Intent();
 intent.putExtra(&quot;MyData&quot;, data);
 setResult(123, intent);
 finish();
}
</code></pre>

I've 2 activities, Activity1 and Activity2.

In <code>Activity1</code> I've a Button and TextView.
When the button is clicked Activity2 is started.

In <code>Activity2</code> I've an EditText.

I want to display the data retrieved from EditText in Activity2 in the TextView in Activity1 when back is pressed from Activity2.

can someone help me with the code to make this work?

How to pass data from 2nd activity to 1st activity when pressed back? - android

Android

我有两个活动，Activity1和Activity2。在Activity1中，我有一个按钮和TextView。单击该按钮时，将启动Activity2。在Activity2中，我有一个EditText。当从Activity2 2按back时，我要显示从Activity2 Activity2中的TextView in Ac...

问当按回按钮时，如何将数据从第二个活动传递到第一个活动？- android
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