android：退出應用程序（活動）對話框關閉

Question

我有一個活動，打開一個對話框註冊或登錄。我想要的是，如果我按下後退按鈕不僅對話框，而且活動應該退出。我怎樣才能做到這一點？

Answer 1

使用setOnCancelListener調用finish()您可以設置setOnCancelListener監聽到你的對話和簡單的調用finish()

Answer 2

public void onBackPressed() { 

     final Builder builder = new Builder(this); 
     builder.setTitle(R.string.caption); 
     builder.setMessage("Do you really want to exit?"); 
     builder.setPositiveButton(android.R.string.ok, new OnClickListener() { 
      @Override 
      public void onClick(final DialogInterface dialog, final int which) { 
        YourActivity.this.finish(); 
        dialog.dismiss();  
      } 
     }); 
     builder.setNegativeButton(android.R.string.cancel, 
       new OnClickListener() { 
        @Override 
        public void onClick(final DialogInterface dialog, 
          final int which) { 
                dialog.dismiss(); 
        } 
       }); 
     final AlertDialog dialog = builder.create(); 
     dialog.show(); 
} 

當按下對話框

//for example 
new AlertDialog.Builder(this) 
.setOnCancelListener(new OnCancelListener() { 

    @Override 
    public void onCancel(DialogInterface dialog) { 
     finish(); //to finish Activity on which dialog is displayed 
    } 
}) 
... 

Answer 3

背鍵這應該解決您的問題:)