AlertBox在后面按下android

我想在用户按下手机时显示alertbox。所以干脆我用::AlertBox在后面按下android

public boolean onKeyDown(int keyCode, KeyEvent event) { 
     if ((keyCode == KeyEvent.KEYCODE_BACK)) { 
      try { 
        AlertDialog.Builder alertbox = new AlertDialog.Builder(this); 
        alertbox.setMessage("This is the alertbox!"); 
        alertbox.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 


         public void onClick(DialogInterface arg0, int arg1) { 
          Toast.makeText(getApplicationContext(), "'Yes' button clicked", Toast.LENGTH_SHORT).show(); 
         } 
        }); 

        // set a negative/no button and create a listener 
        alertbox.setNegativeButton("No", new DialogInterface.OnClickListener() { 


         public void onClick(DialogInterface arg0, int arg1) { 
          Toast.makeText(getApplicationContext(), "'No' button clicked", Toast.LENGTH_SHORT).show(); 
         } 
        }); 

        alertbox.show(); 
      stopService(new Intent(this, BackServices.class)); 
       finish(); 
      } catch (Exception e) { 
       // TODO: handle exception 
      } 
     } 
     return super.onKeyDown(keyCode, event); 
    }

but problem is：当我按下回alertbox节目，但它从应用程序退出。我想停止从应用程序退出，直到用户按是button.if用户按下没有再回到应用

来源

2011-09-07 Nikunj Patel

那么有两件事情使人们有可能

1）

stopService(new Intent(this, BackServices.class)); 
       finish();

从这里删除finish();，因为这是您的活动接近的原因

2）而不是

return super.onKeyDown(keyCode, event);

可以返回false这样，

return false;

来源

2011-09-07 05:49:04

这是很好的解决方案 –

我已经使用第二个数字选项 –

现在你能告诉我如何让警报框变得丰富多彩或有吸引力 –

我的做法会是这样，

public void onBackPressed() { 
    //finish(); 
    AlertDialog.Builder alertbox = new AlertDialog.Builder(this); 
    alertbox.setTitle("Warning"); 
    alertbox.setMessage("Exit Application?"); 
    alertbox.setPositiveButton("Yes", new 
    DialogInterface.OnClickListener() { 
    public void onClick(DialogInterface arg0, int arg1) { 
    finish(); 
    } 
    }); 
    alertbox.setNegativeButton("No", new 
    DialogInterface.OnClickListener() { 
    public void onClick(DialogInterface arg0, int arg1) { 

    } 
    }); 
    alertbox.show(); 
}

或考虑自己的代码，我可以做什么喜欢这个。

你必须提供完成（）这样的肯定按钮点击事件中，

public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if ((keyCode == KeyEvent.KEYCODE_BACK)) { 
     try { 
       AlertDialog.Builder alertbox = new AlertDialog.Builder(this); 
       alertbox.setMessage("This is the alertbox!"); 
       alertbox.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 


        public void onClick(DialogInterface arg0, int arg1) { 
         Toast.makeText(getApplicationContext(), "'Yes' button clicked", Toast.LENGTH_SHORT).show(); 
     stopService(new Intent(this, BackServices.class)); 
           finish(); 
        } 
       }); 

       // set a negative/no button and create a listener 
       alertbox.setNegativeButton("No", new DialogInterface.OnClickListener() { 


        public void onClick(DialogInterface arg0, int arg1) { 
         Toast.makeText(getApplicationContext(), "'No' button clicked", Toast.LENGTH_SHORT).show(); 
        } 
       }); 

       alertbox.show(); 


     } catch (Exception e) { 
      // TODO: handle exception 
     } 
    } 
    return super.onKeyDown(keyCode, event); 
}

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2011-09-07 05:29:58

当我按下返回键，对话是在第二时刻将关闭应用程序，以及对话没有按任意键 –

我已经做了一点改变我的答案中。现在试试 –

仍然没有通过你的方法解决 –

Keep your code as it is...with adding finish() call in positive button click 
And override onBackPressed() method with doing nothin 

public void onBackPressed() { 

} 

public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if ((keyCode == KeyEvent.KEYCODE_BACK)) { 
     try { 
       AlertDialog.Builder alertbox = new AlertDialog.Builder(this); 
       alertbox.setMessage("This is the alertbox!"); 
       alertbox.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 


        public void onClick(DialogInterface arg0, int arg1) { 
         Toast.makeText(getApplicationContext(), "'Yes' button clicked", Toast.LENGTH_SHORT).show(); 
     stopService(new Intent(this, BackServices.class)); 
           finish(); 
        } 
       }); 

       // set a negative/no button and create a listener 
       alertbox.setNegativeButton("No", new DialogInterface.OnClickListener() { 


        public void onClick(DialogInterface arg0, int arg1) { 
         Toast.makeText(getApplicationContext(), "'No' button clicked", Toast.LENGTH_SHORT).show(); 
        } 
       }); 

       alertbox.show(); 


     } catch (Exception e) { 
      // TODO: handle exception 
     } 
    } 
    return super.onKeyDown(keyCode, event); 
}

来源

2011-09-07 05:51:55 user932066

更好的解决方案将是返回到true表明您已经消耗的事件。

public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if ((keyCode == KeyEvent.KEYCODE_BACK)) { 
     // do your stuff 
     .... 
     .... 
     return true; // control will return from here. super will not be called. 
    } 
    return super.onKeyDown(keyCode, event); 
}

来源

2011-09-07 07:34:18 Ronnie

AlertBox在后面按下android

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