android基本组件 Button

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.Toast;

public class MainActivity extends Activity {
	private Button btn;
	private ImageButton imageBtn;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		btn=(Button) findViewById(R.id.button1);
		imageBtn=(ImageButton) findViewById(R.id.imageButton1);
	}
	public void myClick(View view){
		switch(view.getId()){
		case R.id.button1:
			Toast.makeText(MainActivity.this, "普通按钮被点击", 2000).show();
		case R.id.imageButton1:
			Toast.makeText(MainActivity.this, "图片按钮被点击", 2000).show();
		}
	}

}