2012-07-01 45 views
21

在下面的代码中,我如何关闭警报框?我不想造成内存泄漏。我试着alertDialog的.dismiss(),但没有工作... 感谢如何关闭AlertDialog.Builder?

// User pressed the stop button 
public void StopMsg_button_action(View view){ 
    final EditText password_input = new EditText(this); // create an text input field 
    password_input.setHint("Enter Password"); // put a hint in it 
    password_input.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD); // change it to password type 

    AlertDialog.Builder alertDialog = new Builder(this); // create an alert box 
    alertDialog.setTitle("Enter Password"); // set the title 
    alertDialog.setView(password_input); // insert the password text field in the alert box 
    alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() { // define the 'OK' button 
     public void onClick(DialogInterface dialog, int which) { 
      String entered_password = password_input.getText().toString(); 
      if (entered_password.equals(my_password)) { 
       locManager.removeUpdates(locListener); // stop listening for GPS coordinates 
       startActivity(new Intent(Emergency_1Activity.this,Main_MenuActivity.class)); // go to main menu 
      } else { 
       alert("Incorrect Password"); 
      } 
     } 
    }); 
    alertDialog.setNeutralButton("Cancel", new DialogInterface.OnClickListener() { // define the 'Cancel' button 
     public void onClick(DialogInterface dialog, int which) { 

     } 
    }); 
    alertDialog.show(); // show the alert box 
} 

回答

39

什么没有工作大约解雇()?

您应该能够为使用而不是alertDialog.setNeutralButtonDialog.dismiss(),或Dialog.cancel()

alertDialog.setNeutralButton("Cancel", new DialogInterface.OnClickListener() { // define the 'Cancel' button 
    public void onClick(DialogInterface dialog, int which) { 
     //Either of the following two lines should work. 
     dialog.cancel(); 
     //dialog.dismiss(); 
    } 
}); 
+0

你能告诉我代码吗?我真的很困惑,谢谢 – sneaky

+0

当然,请参阅我的编辑。 – FoamyGuy

+13

'AlertDialog.Builder'没有'取消'方法 – xmen

1

只使用alertDialog.setNegativeButton。使用dialog.cancel(),因为dialog.dismiss()不是可用于警报对话框的方法。

1

只是重写create方法并保存对话框实例。然后,你可以调用解雇

@Override 
public AlertDialog create() { 
    this.dialog = super.create(); 
    return this.dialog; 
} 

在某处代码:

dialog.dismiss(); 
10

,如果你不想把任何按键和具有自定义布局,必须用这种方式在其中有说textview,你想解雇警告对话框点击该文本视图:

AlertDialog alertDialog = builder.show(); 

then检查

if(alertDialog != null && alertDialog.isShowing()){ 
     alertDialog.dismiss(); 
} 

这也是如果你想在检查一些条件后将它关闭在你的活动的其他地方也是如此。

+1

完美和最好的答案,很好的解释 –

28

通过以下代码,您可以显示一个ListBox AlertDialog,并且当您按下某个项目时,您将关闭该对话框。代码的顺序是重要的。

AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); 

String names[] ={"A","B","C","D"}; 
ArrayAdapter<String> adapter = new ArrayAdapter<String>(mContext,android.R.layout.simple_list_item_1,names); 

LayoutInflater inflater = getLayoutInflater(); 
View convertView = (View)inflater.inflate(R.layout.list_layout, null); 
ListView lv = (ListView) convertView.findViewById(R.id.listView1); 
lv.setAdapter(adapter); 
alertDialog.setView(convertView); 
alertDialog.setTitle("List"); 
final AlertDialog ad = alertDialog.show(); 

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() 
{ 
    @Override 
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
    { 
     //Toast.makeText(mContext, position, Toast.LENGTH_LONG).show(); 
     ad.dismiss(); 
    } 
}); 
+0

完美!非常感谢! – NightFury

+0

这就是我一直在寻找的。谢谢!!!! – Vicky

+0

谢谢! 这里的关键是关闭用alertDialog.show()创建的对话框。在构建器中创建一个对话框并在该对话框中调用关闭不会消除我们在调用show()时创建的同一个对话框。这一个让我难住了一下=) –

7

这种方法演示的是更多有需要的代码..从Namrata的早期回答

@SuppressLint("InflateParams") 
private static void showDialog(Activity activity, int layoutId) 
{ 
    LayoutInflater inflater = activity.getLayoutInflater(); 
    View dialoglayout = inflater.inflate(layoutId, null); 

    AlertDialog.Builder builder = new AlertDialog.Builder(activity); 
    builder.setView(dialoglayout); 

    CustomDialog.doCustomLogic(activity, layoutId, dialoglayout); 

    final AlertDialog alertDialog = builder.show(); 

    // caller assumes there will be a btn_close element present 
    Button closeNowBtn = (Button) dialoglayout.findViewById(R.id.btn_close); 
    closeNowBtn.setOnClickListener(new View.OnClickListener() 
    { 
     public void onClick(View v) 
     { 
      alertDialog.dismiss(); 
     } 
    }); 
} 
13

的代码非常简单:

final AlertDialog show = alertDialog.show(); 

终于在按钮例如行动:

show.dismiss(); 

对于示例乐使用自定义alertdialog:关于Java

enter image description here

代码,你可以创建一个对象AlertDialog:

public class ViewAlertRating { 

    Context context; 
    public ViewAlertRating(Context context) { 
     this.context = context; 
    } 

    public void showAlert(){ 

     AlertDialog.Builder alertDialog = new AlertDialog.Builder(context); 
     LayoutInflater inflater = ((Activity) context).getLayoutInflater(); 
     View alertView = inflater.inflate(R.layout.layout_test, null); 
     alertDialog.setView(alertView); 

     final AlertDialog show = alertDialog.show(); 

     Button alertButton = (Button) alertView.findViewById(R.id.btn_test); 
     alertButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       show.dismiss(); 
      } 
     }); 
    } 
} 

代码XML layout_test。XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"> 


    <TextView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:text="Valoración" 
     android:id="@+id/text_test1" 
     android:textSize="20sp" 
     android:textColor="#ffffffff" 
     android:layout_centerHorizontal="true" 
     android:gravity="center_horizontal" 
     android:textStyle="bold" 
     android:paddingTop="10dp" 
     android:paddingBottom="10dp" 
     android:background="#ff37dabb" 
     android:paddingLeft="20dp" 
     android:paddingRight="20dp" /> 


    <LinearLayout 
     android:orientation="vertical" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:paddingLeft="20dp" 
     android:paddingRight="20dp" 
     android:layout_marginTop="15dp"> 

     <EditText 
      android:layout_width="match_parent" 
      android:layout_height="120dp" 
      android:id="@+id/edit_test" 
      android:hint="Descripción" 
      android:textColor="#aa000000" 
      android:paddingLeft="10dp" 
      android:paddingRight="10dp" 
      android:textColorHint="#aa72777a" 
      android:gravity="top" /> 
    </LinearLayout> 

    <LinearLayout 
     android:orientation="horizontal" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:gravity="center_horizontal" 
     android:paddingTop="10dp" 
     android:paddingLeft="15dp" 
     android:paddingRight="15dp" 
     android:paddingBottom="15dp" > 

     <LinearLayout 
      android:orientation="horizontal" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" > 

      <LinearLayout 
       android:orientation="horizontal" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:weightSum="1.00" 
       android:gravity="right" > 

       <Button 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:text="Enviar" 
        android:id="@+id/btn_test" 
        android:gravity="center_vertical|center_horizontal" 
        android:textColor="#ffffffff" 
        android:background="@drawable/btn_flat_blue_selector" /> 
      </LinearLayout> 
     </LinearLayout> 
    </LinearLayout> 
</LinearLayout> 

最后调用上的活动:

ViewAlertRating alertRating = new ViewAlertRating(this); 
alertRating.showAlert(); 
+1

伟大的解决方案。帮助了我很多! –

0

我想这和工作!

.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialogInterface, int i) { 
       alertDialog.setCancelable(true); 
      } 
     }); 
+0

谢谢...... – Varma

0

要关闭或取消AlertDialog.Builder

dialog.setNegativeButton("إلغاء", new DialogInterface.OnClickListener() { 
    @Override 
    public void onClick(DialogInterface dialogInterface, int i) { 
     dialogInterface.dismiss() 
    } 
}); 

你必须调用dismiss()对话框界面。