Answers for "android onclick open new activity"

android how to start a new activity on button click

Intent intent = new Intent(this, ActivityToBeCalled.class);
startActivity(intent);

navigate to another activity in android

OnClickListener onClickListener = new OnClickListener() {
    @Override
    public void onClick(View v) {
        startActivity(new Intent(action));
    }
};

Button button = (Button) findViewById(id);
button.setOnClickListener(onClickListener);