Button button1 = findViewById(R.id.button1);
        Button one = (Button)this.findViewById(R.id.button2);
        Button button3 = findViewById(R.id.button3);
        Button button4 = findViewById(R.id.button4);
        Button button5 = findViewById(R.id.button5);
        final TextView mTextView = (TextView) findViewById(R.id.textView);
        final MediaPlayer mp = MediaPlayer.create(this, R.raw.sample);


        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mTextView.setText("Iam Keyborad, Hello");
            }
        });
        one.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                mp.start();
            }
        });
        button3.setOnClickListener(this);
        button4.setOnClickListener(this);
        button5.setOnClickListener(this);