blocks|key|903675|text|简化示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|903676|public+interface+TextListener+{
++++void+onPositiveResult(CharSequence+text);
}

public+static+AlertDialog+getTextDialog(Context+ctx,
++++++++final+TextListener+listener)+{
++++View+view+=+LayoutInflater.from(ctx).inflate(R.layout.dialog,+null);
++++final+TextView+tv+=+(TextView)+view.findViewById(R.id.tv);
++++AlertDialog.Builder+builder+=+new+AlertDialog.Builder(ctx);
++++builder.setView(view);
++++//
++++builder.setPositiveButton(android.R.string.ok,+new+OnClickListener()+{

++++++++@Override
++++++++public+void+onClick(DialogInterface+dialog,+int+which)+{
++++++++++++listener.onPositiveResult(tv.getText());
++++++++}
++++});
++++builder.setNegativeButton(android.R.string.cancel,+null);
++++return+builder.create();
}|code-block|syntax|javascript|903677|--+EDIT+--或者您可以尝试以下代码：|903678|+public+class+Main+extends+Activity+{
++++private+Button+btn;
++++private+String+result;

++++/**+Called+when+the+activity+is+first+created.+*/
++++@Override
++++public+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);
++++++++setContentView(R.layout.main);

++++++++btn+=+(Button)+findViewById(R.id.button1);
++++++++btn.setOnClickListener(new+OnClickListener()+{

++++++++++++@Override
++++++++++++public+void+onClick(View+v)+{
++++++++++++++++showDialog(0);
++++++++++++}
++++++++});
++++}

++++@Override
++++protected+Dialog+onCreateDialog(int+id)+{
++++++++switch+(id)+{
++++++++case+0:
++++++++++++final+EditText+input+=+new+EditText(this);

++++++++++++return+new+AlertDialog.Builder(this)
++++++++++++.setIcon(R.drawable.icon)
++++++++++++.setTitle("Please+enter+a+password")
++++++++++++.setView(input)
++++++++++++.setPositiveButton("OK",+new+DialogInterface.OnClickListener()+{

++++++++++++++++public+void+onClick(DialogInterface+dialog,+int+whichButton)+{
++++++++++++++++++++Toast.makeText(getBaseContext(),+input.getText().toString(),+Toast.LENGTH_SHORT).show();
++++++++++++++++}
++++++++++++})
++++++++++++.setNegativeButton("Cancel",+new+DialogInterface.OnClickListener()+{

++++++++++++++++public+void+onClick(DialogInterface+dialog,+int+whichButton)+{
++++++++++++++++++++Toast.makeText(getBaseContext(),+"Cancel+clicked!",+Toast.LENGTH_SHORT).show();
++++++++++++++++}
++++++++++++}).create();
++++++++}

++++++++return+null;
++++}
}|903679|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|$]]

Simplified example:

<pre><code>public interface TextListener {
 void onPositiveResult(CharSequence text);
}

public static AlertDialog getTextDialog(Context ctx,
 final TextListener listener) {
 View view = LayoutInflater.from(ctx).inflate(R.layout.dialog, null);
 final TextView tv = (TextView) view.findViewById(R.id.tv);
 AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
 builder.setView(view);
 //
 builder.setPositiveButton(android.R.string.ok, new OnClickListener() {

 @Override
 public void onClick(DialogInterface dialog, int which) {
 listener.onPositiveResult(tv.getText());
 }
 });
 builder.setNegativeButton(android.R.string.cancel, null);
 return builder.create();
}
</code></pre>

-- EDIT --
Or you try this code: 

<pre><code> public class Main extends Activity {
 private Button btn;
 private String result;

 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);

 btn = (Button) findViewById(R.id.button1);
 btn.setOnClickListener(new OnClickListener() {

 @Override
 public void onClick(View v) {
 showDialog(0);
 }
 });
 }

 @Override
 protected Dialog onCreateDialog(int id) {
 switch (id) {
 case 0:
 final EditText input = new EditText(this);

 return new AlertDialog.Builder(this)
 .setIcon(R.drawable.icon)
 .setTitle("Please enter a password")
 .setView(input)
 .setPositiveButton("OK", new DialogInterface.OnClickListener() {

 public void onClick(DialogInterface dialog, int whichButton) {
 Toast.makeText(getBaseContext(), input.getText().toString(), Toast.LENGTH_SHORT).show();
 }
 })
 .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

 public void onClick(DialogInterface dialog, int whichButton) {
 Toast.makeText(getBaseContext(), "Cancel clicked!", Toast.LENGTH_SHORT).show();
 }
 }).create();
 }

 return null;
 }
}
</code></pre>

blocks|key|903681|text|public+class+MyActivity+extends+Activity+{
++++private+String+result;

++++void+showDialog()+{
++++++++AlertDialog.Builder+b+=+new+AlertDialog.Builder(this);
++++++++b.setTitle("Please+enter+a+password");
++++++++final+EditText+input+=+new+EditText(this);
++++++++b.setView(input);
++++++++b.setPositiveButton("OK",+new+DialogInterface.OnClickListener()+{
++++++++++++@Override
++++++++++++public+void+onClick(DialogInterface+dialog,+int+whichButton)+{
++++++++++++++++result+=+input.getText().toString();
++++++++++++}
++++++++});
++++++++b.setNegativeButton("CANCEL",+null);
++++++++b.show();
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|903682|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>public class MyActivity extends Activity {
 private String result;

 void showDialog() {
 AlertDialog.Builder b = new AlertDialog.Builder(this);
 b.setTitle("Please enter a password");
 final EditText input = new EditText(this);
 b.setView(input);
 b.setPositiveButton("OK", new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialog, int whichButton) {
 result = input.getText().toString();
 }
 });
 b.setNegativeButton("CANCEL", null);
 b.show();
 }
}
</code></pre>

blocks|key|903720|text|变量结果，使其成为成员变量，而不是局部变量。通过将"result“作为成员变量，可以在整个活动中访问它。(扩展活动的父类)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|903721|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|$]]

Variable result , make it a member variable , instead of local variable. By making "result" as member variable it is accessible in the entire activity.(parent class which extends activity)

blocks|key|687280|text|弱但快速的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|687281|声明一个活动级别方法：|687282|TextView+lblDiaDestination;

public+void+dialogReturn(String+msg){
+++lblDiaDestination.setText(msg);
}|code-block|syntax|javascript|687283|并从单击listner的肯定按钮调用它：|687284|alert.setPositiveButton("Ok",+new+DialogInterface.OnClickListener()+{
++++public+void+onClick(DialogInterface+dialog,+int+whichButton)+{
++++++++dialogReturn(+++input.getText().toString().trim()+++);
++++});|687285|您可以在alert.show()之前更改lblDiaDestination值：|687286|lblDiaDestination+=+myTextView;
alert.show():|687287|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Weak but speedy solution:

Declare an Activity level method:

<pre><code>TextView lblDiaDestination;

public void dialogReturn(String msg){
 lblDiaDestination.setText(msg);
}
</code></pre>

and call it from positive button click listner:

<pre><code>alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
 public void onClick(DialogInterface dialog, int whichButton) {
 dialogReturn( input.getText().toString().trim() );
 });
</code></pre>

You can change lblDiaDestination value just before alert.show():

<pre><code>lblDiaDestination = myTextView;
alert.show():
</code></pre>

blocks|key|903794|text|您可以按照developer.android.com中的Dialog教程操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|903795|首先创建对话框类：|903796|Adding+a+list|903797|然后将listener添加到这个类中，将结果传递给activity。|903798|Passing+Events+Back+to+the+Dialog's+Host|903799|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/guide/topics/ui/dialogs.html|1|http://developer.android.com/guide/topics/ui/dialogs.html#AddingAList|2|http://developer.android.com/guide/topics/ui/dialogs.html#PassingEvents^0|S|6|0|0|0|0|D|1|0|0|0|14|2|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|H|3|I|5|6|7|16|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|17|8|@]|9|@$A|18|B|19|1|1A]]|C|$]]|$1|L|3|-4|5|6|7|1B|8|@]|9|@]|C|$]]]|M|$N|$5|O|P|Q|C|$R|S]]|T|$5|O|P|Q|C|$R|U]]|V|$5|O|P|Q|C|$R|W]]]]

You can follow the <a href="http://developer.android.com/guide/topics/ui/dialogs.html" rel="nofollow">Dialog</a> tutorial in developer.android.com.

First create dialog class:

<a href="http://developer.android.com/guide/topics/ui/dialogs.html#AddingAList" rel="nofollow">Adding a list</a>

Then add listener to this class to pass result to the activity.

<a href="http://developer.android.com/guide/topics/ui/dialogs.html#PassingEvents" rel="nofollow">Passing Events Back to the Dialog's Host</a>

I am using an AlertDialog.Builder to display a dialog to prompt the user to enter a password, I then want to save that password in a preference, however I can't figure out how to get the result from the alert dialog's input method.

Here is essentially what I would like to be able to do:

<pre><code> String result;
 AlertDialog.Builder b = new AlertDialog.Builder(this);
 b.setTitle("Please enter a password");
 final EditText input = new EditText(this);
 b.setView(input);
 b.setPositiveButton("OK", new DialogInterface.OnClickListener()
 {
 @Override
 public void onClick(DialogInterface dialog, int whichButton)
 {
 //I get a compile error here, it wants result to be final.
 result = input.getText().toString();
 }
 });
 b.setNegativeButton("CANCEL", null);
 b.create().show();
</code></pre>

However, I am open to doing something such as <code>showDialog(int);</code> then using the <code>onCreateDialog(int)</code> method and somehow setting the result and receiving it in some other method, but I have no idea how to go about the last part.

How can I get the results from an AlertDialog?

我使用AlertDialog.Builder显示一个对话框，提示用户输入密码，然后希望将该密码保存在首选项中，但是我不知道如何从警报对话框的输入法获得结果。以下是我希望能够做的事情：    String result;    AlertDialog.Builder b = new AlertDialog.Builder...

问如何从AlertDialog获取结果？
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