How to create a popup window (PopupWindow) in Android

Here, I am giving you a demo example. See this and customize it according to your need.

public class ShowPopUp extends Activity {
    PopupWindow popUp;
    boolean click = true;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        popUp = new PopupWindow(this);
        LinearLayout layout = new LinearLayout(this);
        LinearLayout mainLayout = new LinearLayout(this);
        TextView tv = new TextView(this);
        Button but = new Button(this);
        but.setText("Click Me");
        but.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (click) {
                     popUp.showAtLocation(layout, Gravity.BOTTOM, 10, 10);
                     popUp.update(50, 50, 300, 80);
                     click = false;
                } else {
                     popUp.dismiss();
                     click = true;
                }
            }
        });

        LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT);
        layout.setOrientation(LinearLayout.VERTICAL);
        tv.setText("Hi this is a sample text for popup window");
        layout.addView(tv, params);
        popUp.setContentView(layout);
        // popUp.showAtLocation(layout, Gravity.BOTTOM, 10, 10);
        mainLayout.addView(but, params);
        setContentView(mainLayout);
   }
}

Hope this will solve your issue.