Android應用程序中的AlertDialog不顯示

Question

我正在嘗試創建一個警告對話框，但是當我運行我的應用程序時它不會顯示。這裏是我的代碼：

final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); 
    builder.setMessage("Your GPS seems to be disabled, do you want to enable it?").setCancelable(false).setPositiveButton("Yes", new DialogInterface.OnClickListener() { 
     public void onClick(final DialogInterface dialog, final int id) { 
      startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS)); 
     } 
    }).setNegativeButton("No", new DialogInterface.OnClickListener() { 
     public void onClick(final DialogInterface dialog, final int id) { 
      dialog.cancel(); 
      buildLocationMessage(); 
     } 
    }); 
    final AlertDialog alert = builder.create(); 
    alert.show(); 

Answer 1

試試這個：

final AlertDialog alertDialog = new AlertDialog.Builder(this).create(); 
     alertDialog.setTitle(title); 
     alertDialog.setMessage(message); 

     alertDialog.setButton("OK", new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog, int which) { 
       alertDialog.dismiss(); 
      } 
     }); 
     alertDialog.show(); 

只需添加SET按鈕爲 「否」

Answer 2

試試這個代碼 -

final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); 

builder.setMessage("Your GPS seems to be disabled,do you want to enable it?"); 

builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 

public void onClick(DialogInterface dialog, int whichButton) { 

//do stuff 
startActivity(
    new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS)); 
    } 
}); 

builder.setNegativeButton("No", new DialogInterface.OnClickListener() { 
    public void onClick(DialogInterface dialog, int id) { 
     dialog.cancel(); 
    } 
}); 

AlertDialog alert = builder.create(); 
alert.show();