问题描述:

i want to display pop up when user press back button on home screen . but it is not working,and give no error. and i work on slider menu with this code

 public void onBackPressed() {

// TODO Auto-generated method stub

super.onBackPressed();

AlertDialog.Builder build = new AlertDialog.Builder(this);

build.setTitle("Confirmation");

Log.d("aaaaa", "msg");

build.setMessage("Are you sure, you want to exit ?");

final AlertDialog alertDialog = build.create();

alertDialog.show();

build.setPositiveButton("Ha (Yes)", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

alertDialog.dismiss();

finish();

}

});

build.setNegativeButton("Na (No)", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

alertDialog.dismiss();

}

});

网友答案:

you show the dialog before you set the yes/no buttons. You need to put alertDialog.show(); at the end. Also get rid of super.backPressed(). You do not need it since you are override this original functionality.

网友答案:

Calling super.onBackPressed() means "treat the back button normally" (i.e., finish the activity).

Not calling it if you want to intercept it and show a dialog (as is the case) should be enough.

相关阅读:
Top