如何设置警报对话框以正确显示？

Question

I have a button in my app and I want to show a Alert Dialog when I press that button. I tried to do it but didn't work.I'll be tankful if anyone can help me. here's my code

   cancelBtn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            AlertDialog.Builder builder=new AlertDialog.Builder(getApplicationContext());

            builder.setMessage("unsaved content.are you sure you want to abort operation ?");

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

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    clearAll();

                }


            });


            builder.setNegativeButton("no",new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                     dialog.cancel();

                }
            } );


            builder.create();
            builder.show();


        }
    });

Answer 1

I think it needs to be

AlertDialog.Builder builder = new AlertDialog.Builder(MyActivity.this);

instead of

AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());

where MyActivity is the Activity where you have written this code.

Also, you forgot to add

builder.setTitle("Title");