在Android的Notification中显示进度条

来源：互联网发布：了不起的node 编辑：程序博客网时间：2024/05/16 09:29

http://vyphn.javaeye.com/blog/799126

最近研究了Notification,参考了一些文档，写了一些心得。在官方文档中得知在Android的Notification中可以显示进度条，就想做个例子试一下。在网上查了下，没有找到
。决定自己写下，费了九牛二虎之力搞定了，现在拿出与大家分享下，废话少说，上代码：先自定义一个view

Java代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:background="#880490FF"
>
<ImageView android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
/>
<ProgressBar
android:id="@+id/pb"
android:layout_width="180dip"
android:layout_height="wrap_content"
style="?android:attr/progressBarStyleHorizontal"
android:layout_gravity="center_vertical"/>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:textSize="16px"
android:textColor="#FF0000"/>
</LinearLayout>

接着在Activity中写了逻辑代码：

Java代码

package com.jieer;
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.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.RemoteViews;
public class MainActivity extends Activity {
//当前进度条里的进度值
private int progress=0;
private RemoteViews view=null;
private Notification notification=new Notification();
private NotificationManager manager=null;
private Intent intent=null;
private PendingIntent pIntent=null;//更新显示
private Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
view.setProgressBar(R.id.pb, 100, progress, false);
view.setTextViewText(R.id.tv, "下载"+progress+"%");//关键部分，如果你不重新更新通知，进度条是不会更新的
notification.contentView=view;
notification.contentIntent=pIntent;
manager.notify(0, notification);
super.handleMessage(msg);
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
manager=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
view=new RemoteViews(getPackageName(),R.layout.custom_dialog);
intent=new Intent(MainActivity.this,NotificationService.class);
pIntent=PendingIntent.getService(MainActivity.this, 0, intent, 0);
Button button=(Button)findViewById(R.id.bt);
button.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
//通知的图标必须设置(其他属性为可选设置),否则通知无法显示
notification.icon=R.drawable.icon;
view.setImageViewResource(R.id.image, R.drawable.icon);//起一个线程用来更新progress
new Thread(new Runnable(){
@Override
public void run() {
for(int i=0;i<20;i++){
progress=(i+1)*5;
try {
if(i<19){
Thread.sleep(1000);
}else {
Thread.currentThread().interrupt();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
Message msg = new Message();
handler.sendMessage(msg);
}
}
}).start();
}
});
}
}