设置button的监;

首先需要说的就是：

监听：在监听的方法里面：会传入一个view这个view就是当前操作的对象：

可以进行强转；

添加按钮的匹配监听：onKey

关于焦点的变化触发相应的事件：onFocusChange

显示屏触摸的触发事件：

布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" 
	android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<Button android:id="@+id/commonbutton" 
	    android:layout_width="wrap_content"
		android:layout_height="wrap_content" 
		android:text="我的按钮一" />

	<Button android:id="@+id/imagebutton" 
	    android:layout_width="wrap_content"
		android:layout_height="wrap_content" 
		android:gravity="center"
		android:background="@drawable/button1" 
		android:text="按钮" />
</LinearLayout>

代码：

package com.example.marvinedittext2;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.view.View.OnKeyListener;
import android.view.View.OnTouchListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.MultiAutoCompleteTextView;

public class MainActivity extends Activity implements OnClickListener, OnTouchListener, OnFocusChangeListener, OnKeyListener {
	private int value = 1;// 用于改变按钮的大小
	private Button commonButton;
	private Button imageButton;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		commonButton = (Button) this.findViewById(R.id.commonbutton);
		imageButton = (Button) this.findViewById(R.id.imagebutton);
		commonButton.setOnClickListener(this);
		imageButton.setOnClickListener(this);
		imageButton.setOnTouchListener(this);
		imageButton.setOnFocusChangeListener(this);
		imageButton.setOnKeyListener(this);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	@Override
	public boolean onKey(View v, int keyCode, KeyEvent event) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public void onFocusChange(View v, boolean hasFocus) {
		if (hasFocus) {
			imageButton.setBackgroundResource(R.drawable.button2);
		} else {
			imageButton.setBackgroundResource(R.drawable.button1);
		}
		
	}

	@Override
	public boolean onTouch(View v, MotionEvent event) {
		// TODO Auto-generated method stub
		// TODO Auto-generated method stub
		if (event.getAction() == MotionEvent.ACTION_UP) {
			v.setBackgroundResource(R.drawable.button1);
		} else if (event.getAction() == MotionEvent.ACTION_DOWN) {
			v.setBackgroundResource(R.drawable.button2);
		}
		return false;
	}

	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		Button button = (Button) v;
		if (value == 1
				&& button.getWidth() == getWindowManager().getDefaultDisplay()
						.getWidth()) {
			value = -1;
		} else if (value == -1 && button.getWidth() < 100) {
			value = 1;
		}
		button.setWidth(button.getWidth() + (int) (button.getWidth() * 0.1)
				* value);
		button.setHeight(button.getHeight() + (int) (button.getHeight() * 0.1)
				* value);
		
	}
}

总结：需要注意的是： 监听自己注意是哪一个控件，千万需要注意。还需要明白这是一个什么控件，还有标志变量的作用。