Android点击改变按钮颜色的3种效果

效果：

核心代码：

package com.zhh.android;


import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.os.Build;


public class MainActivity extends Activity {
/**
* 一个按钮的上下颜色变化
* 
*/
private Button btn;
/**
* 4个按钮的变化
* 
*/
private Button b1,b2,b3,b4;


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.btn = (Button) findViewById(R.id.button1);

b1=(Button) findViewById(R.id.b1);
b2=(Button) findViewById(R.id.b2);
b3=(Button) findViewById(R.id.b3);
b4=(Button) findViewById(R.id.b4);


}


/**
* 一个按钮的上下颜色变化
* 
*/
int kai = R.drawable.isa_xiayiye;
int guan = R.drawable.isa_xiayiye_2;
int shifou = kai;


public void btn_onclick(View v) {
if (shifou == kai) {
shifou = guan;


} else if (shifou == guan) {
shifou = kai;
}
btn.setBackgroundResource(shifou);


}


/**
* 选择器效果在xml文件中完成，不用在代码中写
* 
*/
/**
* 4个按钮的变化
* 
*/
public void btn_click(View v) {
switch (v.getId()) {
case R.id.b1:
//点击按钮颜色变化
b1.setBackgroundResource(R.drawable.t1_1);
b2.setBackgroundResource(R.drawable.t2);
b3.setBackgroundResource(R.drawable.t3);
b4.setBackgroundResource(R.drawable.t4);


break;


case R.id.b2:
b1.setBackgroundResource(R.drawable.t1);
b2.setBackgroundResource(R.drawable.t2_1);
b3.setBackgroundResource(R.drawable.t3);
b4.setBackgroundResource(R.drawable.t4);


break;
case R.id.b3:
b1.setBackgroundResource(R.drawable.t1);
b2.setBackgroundResource(R.drawable.t2);
b3.setBackgroundResource(R.drawable.t3_1);
b4.setBackgroundResource(R.drawable.t4);


break;
case R.id.b4:
b1.setBackgroundResource(R.drawable.t1);
b2.setBackgroundResource(R.drawable.t2);
b3.setBackgroundResource(R.drawable.t3);
b4.setBackgroundResource(R.drawable.t4_1);


break;


}
}


}

如果没有看懂，下载我写的例子

http://download.csdn.net/detail/zhaihaohao1/8261783