How to open a dialog when I click a button?

Question

I have a button and I would like to open a dialog when pressed. This is my code:

Button more = (Button) findViewById(R.id.more); more.setOnClickListener(new View.OnClickListener() {     public void onClick(View view) {         //Intent myIntent = new Intent(view.getContext(), agones.class);         //startActivityForResult(myIntent, 0);          AlertDialog alertDialog = new AlertDialog.Builder(this).create();         alertDialog.setTitle("hi");         alertDialog.setMessage("this is my app");          alertDialog.setButton("Continue..", new DialogInterface.OnClickListener() {         public void onClick(DialogInterface dialog, int which) {             // here you can add functions         }         });     } }); 

Answer 1

As @Roflcoptr has said, you haven't called alertDialog.show() method. thus your dialog doesn't appear.

Here's your edited code:

Button more = (Button) findViewById(R.id.more); more.setOnClickListener(new View.OnClickListener() {     public void onClick(View view) {         //Intent myIntent = new Intent(view.getContext(), agones.class);         //startActivityForResult(myIntent, 0);           AlertDialog alertDialog = new AlertDialog.Builder(<YourActivityName>this).create(); //Read Update         alertDialog.setTitle("hi");         alertDialog.setMessage("this is my app");          alertDialog.setButton("Continue..", new DialogInterface.OnClickListener() {            public void onClick(DialogInterface dialog, int which) {               // here you can add functions            }         });          alertDialog.show();  //<-- See This!     }  }); 

if you write this instead of <ActivityName>.this, then it is going to take the reference of View.OnClickListener since this is currently being accessed inside it. You need to give your Activity's name there.