利用Android自定义View实现转盘旋转的效果

核心提示：thread.start();}//重写View类的onDraw()函数@Overrideprotected void onDraw(Canvas canvas) {//设置转盘旋转矩阵为以(160,160)坐标为圆心，旋转X角度panRotate.setRotate(x, 160, 160);canvas.drawB

thread.start();

}

//重写View类的onDraw()函数

@Override

protected void onDraw(Canvas canvas) {

//设置转盘旋转矩阵为以(160,160)坐标为圆心，旋转X角度

panRotate.setRotate(x, 160, 160);

canvas.drawBitmap(panpic, panRotate, null);

canvas.drawBitmap(panhandpic, panhandTrans, null);

}

//重写的run函数，用来控制转盘转动

public void run() {

try {

while(true){

if(ifRotate){

this.x+=25;

//这个函数强制UI线程刷新界面

this.postInvalidate();

Thread.sleep(50);

}

}

} catch (InterruptedException e) {

e.printStackTrace();

}

}

public void startRotate(){

this.ifRotate=true;

}

public void stopRotate(){

this.ifRotate=false;

}

}

二、主Activity

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package com.test.www;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class Main extends Activity {

/** Called when the activity is first created. */

private void findViewAndButton(){

//自定义的View

final zhuanpanView panView=(zhuanpanView) this.findViewById(R.id.zhuanpanView);

//开始旋转的按钮

Button startButton=(Button) this.findViewById(R.id.startButton);

startButton.setOnClickListener(new OnClickListener(){

public void onClick(View v) {

panView.startRotate();

}

});

//停止旋转的按钮

Button stopButton=(Button) this.findViewById(R.id.stopButton);

stopButton.setOnClickListener(new Button.OnClickListener(){