最近做项目中发现，继承了view类的子类，可以用invalidate方法刷新，或者用hanlder消息机制和线程来处理，或者直接在线程中用postInvalidate来处理，但是继承了surface的子类，就不可以用invalidate方法来刷新界面。我写了个简单刷新界面加载图片的demo，先看效果图：
程序图：没有点击事件 点击男生前面圆圈的效果，再次点击消失
点击矩形区域：下箭头 效果图：数字改变
点击矩形区域： 上箭头数字改变，增加：
一、MainActivity类的代码：
package com.cn.android;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Window;
import android.view.WindowManager;
public class MainActivity extends Activity {
public static final int REFRESH = 0;
public static final int RETURN = 1;
public static final int REGAIN = 2;
GameView mGameView = null;// = new GameView(this,this);
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN ,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
this.initGameView();
new Thread(new GameThread()).start();
}
Handler mHandler=new Handler(){
public void handleMessage(Message msg) {
switch(msg.what){
case MainActivity.REFRESH:
mGameView.postInvalidate(); //刷新界面
break;
case MainActivity.REGAIN:
initGameView();
break;
case MainActivity.RETURN:
initReturn();
break;
default: break;
}
}
};
public void initGameView(){
mGameView = new GameView(this,this);
setContentView(mGameView);
}
public void initReturn(){
//结束程序
System.exit(0);
}
class GameThread implements Runnable
{
public void run()
{
while (!Thread.currentThread().isInterrupted())
{
Message message = new Message();
message.what = MainActivity.REFRESH;
// 发送消息
MainActivity.this.mHandler.sendMessage(message);
try
{
Thread.sleep(100);
}
catch (InterruptedException e)
{
Thread.currentThread().interrupt();
}
}
}
}
}
二、GameView类的代码：
package com.cn.android;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.view.MotionEvent;
import android.view.View;
public class GameView extends View{
private MainActivity activity;
private Bitmap bggame_image;
private Bitmap game_Spoint;
private Bitmap game_Dpoint;
private boolean showSpoint = false;
private boolean showDpoint = false;
private boolean showNose = false;
private static int scount = 1;
private static int dcount = 1;
private static int ncount = 1;
Paint paint;
private String redText = "6";
private static int rcount = 6;
private String blueText = "1";
private static int bcount = 1;
public GameView(Context context,MainActivity activity) {
super(context);
this.activity = activity;
InitBitmap();
}
@Override
public void onDraw(Canvas canvas)
{
paint = new Paint();
paint.setTextSize(35.0f);
canvas.drawBitmap(bggame_image,0,0,null);
if(showSpoint){
canvas.drawBitmap(game_Spoint,32,124,null);
}
if(showDpoint){
canvas.drawBitmap(game_Dpoint,32,207,null);
}
if(showNose){
canvas.drawBitmap(game_Dpoint,88,329,null);
}
canvas.drawText(redText, 148, 152, paint);
canvas.drawText(blueText, 148, 230, paint);
}
//加载图片
private void InitBitmap()
{
bggame_image = BitmapFactory.decodeResource(this.getResources(), R.drawable.ernie);
game_Spoint = BitmapFactory.decodeResource(this.getResources(), R.drawable.game_point);
game_Dpoint = BitmapFactory.decodeResource(this.getResources(), R.drawable.game_point);
}
@Override
public boolean onTouchEvent(MotionEvent event)
{
int x=(int)event.getX();
int y=(int)event.getY();
if(event.getAction()!=MotionEvent.ACTION_DOWN)
return super.onTouchEvent(event);
//设置点击区域，可以用刷新界面来显示要加载的图片
Rect rcSimpleChoice,rcDoulbeChoice,rcRegainGame,rcReturnSE,
rcRedBig,rcRedSmall,rcBlueBig,rcBlueSmall,rcNose;
rcSimpleChoice=new Rect(21,112,63,157);
rcDoulbeChoice=new Rect(21,196,63,235);
rcRegainGame=new Rect(148,424,189,445);
rcReturnSE=new Rect(216,424,258,445);
rcRedBig=new Rect(192,114,240,137);
rcRedSmall=new Rect(189,142,236,168);
rcBlueBig=new Rect(196,188,244,215);
rcBlueSmall=new Rect(193,219,240,245);
rcNose=new Rect(82,326,111,343);
//点击男生的圆圈区域
if(rcSimpleChoice.contains(x,y))
{
if(scount%2 == 1){
showSpoint = true;
}
else if(scount%2 == 0){
showSpoint = false;
}
scount ++;
//通过发送消息来刷新界面
activity.mHandler.sendEmptyMessage(MainActivity.REFRESH);
//invalidate();
}
//点击女生的圆圈区域
if(rcDoulbeChoice.contains(x,y))
{
if(dcount%2 == 1){
showDpoint = true;
}
else if(dcount%2 == 0){
showDpoint = false;
}
dcount ++;
// activity.mHandler.sendEmptyMessage(MainActivity.REFRESH);
//或者直接发送消息
invalidate();
}
if(rcRegainGame.contains(x,y))
{
//点击返回键
activity.mHandler.sendEmptyMessage(MainActivity.RETURN);
}
if(rcReturnSE.contains(x,y))
{
//点击重玩
rcount = 6;
bcount = 1;
activity.mHandler.sendEmptyMessage(MainActivity.REGAIN);
}
//点击红球上箭头按钮
if(rcRedBig.contains(x,y))
{
if(rcount<20){
rcount ++ ;
redText = String.valueOf(rcount);
invalidate();
}
}
//点击红球下箭头按钮
if(rcRedSmall.contains(x,y))
{
if(rcount>6){
rcount -- ;
redText = String.valueOf(rcount);
invalidate();
}
}
//点击蓝球上箭头按钮
if(rcBlueBig.contains(x,y))
{
if(bcount<16){
bcount ++ ;
blueText = String.valueOf(bcount);
invalidate();
}
}
//点击蓝球下箭头按钮
if(rcBlueSmall.contains(x,y))
{
if(bcount>1){
bcount -- ;
blueText = String.valueOf(bcount);
invalidate();
}
}
//点击小人图片鼻子区域
if(rcNose.contains(x,y))
{
if(ncount%2 == 1){
showNose = true;
}
else if(ncount%2 == 0){
showNose = false;
}
ncount ++;
//通过发送消息来刷新界面
activity.mHandler.sendEmptyMessage(MainActivity.REFRESH);
//invalidate();
}
return super.onTouchEvent(event);
}
}
三、特别说明，有想要源码的可以留言，有问题的可以留言，有好的见解的也可以留言，互相讨论，共同进步；
转载请标明出处：http://blog.****.net/wdaming1986/article/details/6677729
谢谢
