定时通知(Notification)刷新实现SurfaceView双缓冲机制

看了些例子,也就简单些了些东西,希望能供给相关朋友做相关的参考,还是一样直接贴源码吧：
主类:

package com.jsd.demo;

import java.util.Timer;

import java.util.TimerTask;

import android.app.Activity;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import com.jsd.demo.service.ServiceDemo;

/**

*

* @author jiangshide

*

*/

public class DemoNoti extends Activity{

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.noti);

findViewById();

}

private int id = 1223171712;

private NotificationManager nm;

private void findViewById(){

Button button = (Button) findViewById(R.id.button);

button.setOnClickListener(listener);

Timer time = new Timer();

time.schedule(new TimerTask() {

@Override

public void run() {

startService(new Intent(DemoNoti.this,ServiceDemo.class));

System.out.println("run => server");

// showNotifaction(R.drawable.canshu_6,"clear user!","The Clear User!","This is for clear current user that you operation to app,pelease you relogin for it!");

}

}, 0);

}

private OnClickListener listener = new OnClickListener() {

@Override

public void onClick(View v) {

startService(new Intent(DemoNoti.this,ServiceDemo.class));

System.out.println("onClick run => server");

}

};

private void showNotifaction(int icon,String tic,String title,String content){

Notification noti = new Notification(icon, tic,System.currentTimeMillis());

noti.defaults = Notification.DEFAULT_ALL;

PendingIntent intent = PendingIntent.getActivity(this, 0,new Intent(this,MainActivity.class),0);

noti.setLatestEventInfo(this, title, content, intent);

nm.notify(id, noti);

System.out.println("notification....");

}

}

服务类:

package com.jsd.demo.service;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.app.Service;

import android.content.Intent;

import android.os.IBinder;

import com.jsd.demo.MainActivity;

import com.jsd.demo.R;

/**

*

* @author jiangshide

*

*/

public class ServiceDemo extends Service{

int notification_id=19172439;

NotificationManager nm;

@Override

public IBinder onBind(Intent intent) {

return null;

}

@Override

public void onStart(Intent intent, int startId) {

nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);

showNotification(R.drawable.canshu_3,"clear user!","The Clear User!","This is for clear current user that you operation to app,pelease you relogin for it!");

}

private void showNotification(int icon,String tic,String title,String content){

Notification noti = new Notification(icon, tic,System.currentTimeMillis());

noti.defaults = Notification.DEFAULT_ALL;

PendingIntent intent = PendingIntent.getActivity(this, 0,new Intent(this,MainActivity.class),0);

noti.setLatestEventInfo(this, title, content, intent);

nm.notify(notification_id, noti);

System.out.println("notification....");

}

}

SurfaceView实现类:

package com.jsd.demo;

import java.lang.reflect.Field;

import java.util.ArrayList;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.Rect;

import android.os.Bundle;

import android.util.Log;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.View;

import android.widget.Button;

/**

*

* @author jiangshide

*

*/

public class MainActivity extends Activity {

Button btnSingleThread, btnDoubleThread;

SurfaceView sfv;

SurfaceHolder sfh;

ArrayList<Integer> imgList = new ArrayList<Integer>();

int imgWidth, imgHeight;

Bitmap bitmap;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

findViewById();

}

private void findViewById() {

btnSingleThread = (Button) this.findViewById(R.id.Button01);

btnDoubleThread = (Button) this.findViewById(R.id.Button02);

btnSingleThread.setOnClickListener(new ClickEvent());

btnDoubleThread.setOnClickListener(new ClickEvent());

sfv = (SurfaceView) this.findViewById(R.id.SurfaceView01);

sfh = sfv.getHolder();

sfh.addCallback(new MyCallBack());// 自动运行surfaceCreated以及surfaceChanged

}

class ClickEvent implements View.OnClickListener {

@Override

public void onClick(View v) {

if (v == btnSingleThread) {

new Load_DrawImage(0, 0).start();//开一条线程读取并绘图

} else if (v == btnDoubleThread) {

new LoadImage().start();//开一条线程读取

new DrawImage(imgWidth + 10, 0).start();//开一条线程绘图

}

}

}

class MyCallBack implements SurfaceHolder.Callback {

@Override

public void surfaceChanged(SurfaceHolder holder, int format, int width,

int height) {

Log.i("Surface:", "Change");

}

@Override

public void surfaceCreated(SurfaceHolder holder) {

Log.i("Surface:", "Create");

// 用反射机制来获取资源中的图片ID和尺寸

Field[] fields = R.drawable.class.getDeclaredFields();

for (Field field : fields) {

if (!"icon".equals(field.getName()))// 除了icon之外的图片

{

int index = 0;

try {

index = field.getInt(R.drawable.class);

} catch (IllegalArgumentException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IllegalAccessException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

// 保存图片ID

imgList.add(index);

}

}

// 取得图像大小

Bitmap bmImg = BitmapFactory.decodeResource(getResources(),

imgList.get(0));

imgWidth = bmImg.getWidth();

imgHeight = bmImg.getHeight();

}

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

Log.i("Surface:", "Destroy");

}

}

/**

* 读取并显示图片的线程

*/

class Load_DrawImage extends Thread {

int x, y;

int imgIndex = 0;

public Load_DrawImage(int x, int y) {

this.x = x;

this.y = y;

}

public void run() {

while (true) {

Canvas c = sfh.lockCanvas(new Rect(this.x, this.y, this.x

+ imgWidth, this.y + imgHeight));

Bitmap bmImg = BitmapFactory.decodeResource(getResources(),

imgList.get(imgIndex));

c.drawBitmap(bmImg, this.x, this.y, new Paint());

imgIndex++;

if (imgIndex == imgList.size())

imgIndex = 0;

sfh.unlockCanvasAndPost(c);// 更新屏幕显示内容

}

}

};

/**

* 只负责绘图的线程

*/

class DrawImage extends Thread {

int x, y;

public DrawImage(int x, int y) {

this.x = x;

this.y = y;

}

public void run() {

while (true) {

if (bitmap != null) {//如果图像有效

Canvas c = sfh.lockCanvas(new Rect(this.x, this.y, this.x

+ imgWidth, this.y + imgHeight));

c.drawBitmap(bitmap, this.x, this.y, new Paint());

sfh.unlockCanvasAndPost(c);// 更新屏幕显示内容

}

}

}

};

/**

* 只负责读取图片的线程

*/

class LoadImage extends Thread {

int imgIndex = 0;

public void run() {

while (true) {

bitmap = BitmapFactory.decodeResource(getResources(),

imgList.get(imgIndex));

imgIndex++;

if (imgIndex == imgList.size())//如果到尽头则重新读取

imgIndex = 0;

}

}

};

}

main.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent" android:layout_height="fill_parent"

android:orientation="vertical">

<LinearLayout android:id="@+id/LinearLayout1"

android:layout_width="wrap_content" android:layout_height="wrap_content">

<Button android:id="@+id/Button01" android:layout_width="wrap_content"

android:layout_height="wrap_content" android:text="单个独立线程"></Button>

<Button android:id="@+id/Button02" android:layout_width="wrap_content"

android:layout_height="wrap_content" android:text="两个独立线程"></Button>

</LinearLayout>

<SurfaceView android:id="@+id/SurfaceView01"

android:layout_width="fill_parent" android:layout_height="fill_parent">

</SurfaceView>

</LinearLayout>

noti.xml: 就一个BUTTON



<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

>

<Button

android:id="@+id/button"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="notification"

/>

</LinearLayout>

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.jsd.demo"

android:versionCode="1"

android:versionName="1.0">

<uses-sdk android:minSdkVersion="8" />

<application android:icon="@drawable/icon" android:label="@string/app_name">

<activity android:name=".MainActivity"

android:label="@string/app_name">

</activity>

<activity android:name=".DemoNoti">

</activity>

<activity android:name=".DemoNoti">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

<service android:enabled="true" android:name=".service.ServiceDemo"/>

</application>

<uses-permission android:name="android.permission.VIBRATE" />

</manifest>

OK,以上就实现的全部代码,可以直接CP后使用.....

直接启动通知,与点击按钮通知后打开通知点击其通知内容你可以进入下个ACTIV ITY然后测试SURFACEVIEW单线程与双线程所存在的区别: