Android 自动更新 后代通知栏显示进度

app的更新功能

开启一个服务后台下载apk 并且在通知栏显示进度

package com.baidu.text;

import android.app.IntentService;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.support.v7.app.NotificationCompat;
import android.util.Log;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

/*
* @项目名： text
* @包名： com.baidu.text
* @文件名: MyIntentService
* @创建者: okmin
* @创建时间: 2016/12/15 0015 14:16
* @描述： TODO
*/
public class MyIntentService extends IntentService {
private String mDownloadUrl;//APK的下载路径
private NotificationManager mNotificationManager;
private Notification mNotification;
private File mFile;
private NotificationCompat.Builder mBuilder;
/**
* Creates an IntentService. Invoked by your subclass's constructor.
*
*/
public MyIntentService() {
super("MyIntentService");
}

@Override
protected void onHandleIntent(Intent intent) {
mDownloadUrl = intent.getStringExtra("apkUrl");//获取下载APK的链接
mNotificationManager = (NotificationManager) getSystemService(Service.NOTIFICATION_SERVICE);
downloadFile();//下载APK
}

private void downloadFile() {

FileOutputStream fos = null;
InputStream is = null;
try {
URL url = new URL(mDownloadUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(8000);
conn.setReadTimeout(8000);
conn.connect();
if (conn.getResponseCode() == 200) {
int max = conn.getContentLength();
mFile = new File(Environment.getExternalStorageDirectory(), "new.apk");
fos = new FileOutputStream(mFile);
is = conn.getInputStream();
byte[] buffer = new byte[1024];
int len;
int progress = 0;
while ((len = is.read(buffer)) > 1) {
fos.write(buffer, 0, len);
progress += len;
inProgress(progress,max);

}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fos!=null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (is!=null) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public void inProgress(int progress, int total) {

int pro=progress*100/total;
Log.e("dfsf", "max"+total+"progress"+progress+"百分比"+pro);
if (pro % 5 == 0) {
//避免频繁刷新View，这里设置每下载5%提醒更新一次进度
notifyMsg("温馨提醒", "文件正在下载..", pro);
}
}
private void notifyMsg(String title, String content, int progress) {
if (mBuilder==null) {
mBuilder = new NotificationCompat.Builder(this);
mBuilder.setSmallIcon(R.mipmap.ic_launcher).setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher)).setContentTitle(title);
}
if (progress > 0 && progress < 100) {
//下载进行中
mBuilder.setProgress(100, progress, false);
} else {
mBuilder.setProgress(0, 0, false);
}
mBuilder.setAutoCancel(true);
mBuilder.setWhen(System.currentTimeMillis());
if (progress >= 100) {
//下载完成
mBuilder.setContentIntent(getInstallIntent());
mBuilder.setContentText("下载完成点击安装");
} else {
mBuilder.setContentText(content);
}
mNotification = mBuilder.build();
mNotificationManager.notify(0, mNotification);
}
private PendingIntent getInstallIntent() {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setDataAndType(Uri.parse("file://" + mFile.getAbsolutePath()), "application/vnd.android.package-archive");
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
return pendingIntent;
}

}
想立马看见效果只需要调用 这是一个下载豌豆荚的链接
Intent intent = new Intent(this, MyIntentService.class);
String str="http://a.wdjcdn.com/release/files/phoenix/5.23.1.12064/wandoujia-wandoujia-web_inner_referral_binded_5.23.1.12064.apk?remove=2&append=%94%00eyJhcHBEb3dubG9hZCI6eyJkb3dubG9hZFR5cGUiOiJkb3dubG9hZF9ieV9wYWNrYWdlX25hbWUiLCJwYWNrYWdlTmFtZSI6ImNvbS5leGFtcGxlLmRhb2RpYW53YW5nIn19Wdj01B0000842730";
intent.putExtra("apkUrl", str);
startService(intent);其中你可以会遇见这个错误
12-15 14:52:22.726 7884-8717/com.baidu.text W/System.err: java.lang.RuntimeException:
bad array lengths

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at android.os.Parcel.readIntArray(Parcel.java:820)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at android.app.INotificationManager$Stub$Proxy.enqueueNotificationWithTag(INotificationManager.java:321)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at android.app.NotificationManager.notify(NotificationManager.java:136)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at android.app.NotificationManager.notify(NotificationManager.java:109)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at com.baidu.text.MyIntentService.notifyMsg(MyIntentService.java:125)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at com.baidu.text.MyIntentService.inProgress(MyIntentService.java:101)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at com.baidu.text.MyIntentService.downloadFile(MyIntentService.java:72)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at com.baidu.text.MyIntentService.onHandleIntent(MyIntentService.java:48)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:102)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at android.os.Looper.loop(Looper.java:136)

12-15 14:52:22.746 7884-8717/com.baidu.text W/System.err:     at android.os.HandlerThread.run(HandlerThread.java:61)

这是因为你过于频繁的修改通知的一个进度了.所以我每隔5%才去更新进度 setProgress

根据手机性能报错的次数不一样

只要不太频繁就不会出问题