public void onButtonClick(View v) {
        //
        Button button = (Button) v;
        button.setText("Нажато");

        switch (v.getId()) {
            case R.id.btn_List:
                break;
        }
    }

button.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View view) {
				Toast.makeText(MainActivity.this, "Button Clicked",	Toast.LENGTH_SHORT).show();
			}

		});

// Create an anonymous implementation of OnClickListener
private OnClickListener mCorkyListener = new OnClickListener() {
    public void onClick(View v) {
      // do something when the button is clicked
    }
};

protected void onCreate(Bundle savedValues) {
    ...
    // Capture our button from layout
    Button button = (Button)findViewById(R.id.corky);
    // Register the onClick listener with the implementation above
    button.setOnClickListener(mCorkyListener);
    ...
}