DownloadManager downloadManager = (DownloadManager) getSystemService(Activity.DOWNLOAD_SERVICE);
DownloadManager.Request request = new Request(Uri.parse(dl));
request.setTitle(getString(R.string.app_name));
request.setDestinationUri(getDownloadName(getIntent().getStringExtra("version_name")));
long reference = downloadManager.enqueue(request);
UserSettingHelper.getInstance().setUpgradeKey(reference);package com.example.updataapk;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
/**
*
* @author baozi
*
*/
public class MainActivity extends Activity {
// 地址
private String dl = "http://17shihui.cn/download/shihui.apk";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Function_Utility.setAppContext(getApplicationContext());
findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Uri uri = Uri.parse(dl);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}
});
findViewById(R.id.button2).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
try {
download(dl);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
private void download(String dl) throws Exception {
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.GINGERBREAD) {
Intent service = new Intent(this, DownloadService.class);
service.putExtra(DownloadService.INTENT_URL, dl);
startService(service);
} else {
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(dl));
startActivity(intent);
}
}
}
package com.example.updataapk;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.util.Log;
import android.widget.RemoteViews;
public class DownloadService extends Service {
// notification 名字
private String notify_name = "apk正在下载...";
public static final String INTENT_URL = "url";
private Context mContext = this;
Notification mNotification;
private static final int NOTIFY_ID = 0;
private NotificationManager mNotificationManager;
/* 下载包安装路径 */
private static final String savePath = Function_Utility.getUpgradePath();
private static final String saveFileName = savePath + "demo.apk";
private String apkUrl;
private int progress;
boolean canceled;
private Thread downLoadThread;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
mNotificationManager = (NotificationManager) getSystemService(android.content.Context.NOTIFICATION_SERVICE);
}
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("DownloadService", "intent=" + intent.toString() + " ; flags= " + flags + " ; startId" + startId);
if (intent.hasExtra(DownloadService.INTENT_URL)) {
apkUrl = (String) intent.getExtras().get(DownloadService.INTENT_URL);
}
progress = 0;
setUpNotification();
new Thread() {
public void run() {
// 开始下载
startDownload();
};
}.start();
return startId;
};
private void startDownload() {
canceled = false;
downloadApk();
}
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case 0:
// 下载完毕
// 取消通知
mNotificationManager.cancel(NOTIFY_ID);
installApk();
break;
case 2:
// 这里是用户界面手动取消，所以会经过activity的onDestroy();方法
// 取消通知
mNotificationManager.cancel(NOTIFY_ID);
break;
case 1:
int rate = msg.arg1;
if (rate < 100) {
RemoteViews contentview = mNotification.contentView;
contentview.setTextViewText(R.id.tv_progress, rate + "%");
contentview.setProgressBar(R.id.progressbar, 100, rate, false);
} else {
// 下载完毕后变换通知形式
mNotification.flags = Notification.FLAG_AUTO_CANCEL;
mNotification.contentView = null;
mNotification.setLatestEventInfo(mContext, "下载完成", "文件已下载完毕", null);
stopSelf();// 停掉服务自身
}
PendingIntent contentIntent2 = PendingIntent.getActivity(getApplicationContext(), 0, new Intent(), PendingIntent.FLAG_UPDATE_CURRENT);
mNotification.contentIntent = contentIntent2;
mNotificationManager.notify(NOTIFY_ID, mNotification);
break;
case 3:
mNotification.flags = Notification.FLAG_AUTO_CANCEL;
RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.update_download_notification_layout);
contentView.setTextViewText(R.id.name, "下载失败");
// 指定个性化视图
mNotification.contentView = contentView;
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
// 指定内容意图
mNotification.contentIntent = contentIntent;
mNotificationManager.notify(NOTIFY_ID, mNotification);
stopSelf();// 停掉服务自身
break;
}
}
};
/**
* 安装apk
*
* @param url
*/
private void installApk() {
File apkfile = new File(saveFileName);
if (!apkfile.exists()) {
return;
}
Intent i = new Intent(Intent.ACTION_VIEW);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
mContext.startActivity(i);
}
private int lastRate = 0;
private InputStream is = null;
private FileOutputStream fos = null;
/**
* 下载apk
*
* @param url
*/
private void downloadApk() {
downLoadThread = new Thread(mdownApkRunnable);
downLoadThread.start();
}
private Runnable mdownApkRunnable = new Runnable() {
@Override
public void run() {
try {
URL url = new URL(apkUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.connect();
int length = conn.getContentLength();
is = conn.getInputStream();
File file = new File(savePath);
if (!file.exists()) {
file.mkdirs();
}
String apkFile = saveFileName;
File ApkFile = new File(apkFile);
fos = new FileOutputStream(ApkFile);
int count = 0;
byte buf[] = new byte[1024];
do {
int numread = is.read(buf);
count += numread;
progress = (int) (((float) count / length) * 100);
// 更新进度
Message msg = mHandler.obtainMessage();
msg.what = 1;
msg.arg1 = progress;
if (progress >= lastRate + 1) {
mHandler.sendMessage(msg);
lastRate = progress;
}
if (numread <= 0) {
mHandler.sendEmptyMessage(0);// 下载完成通知安装
// 下载完了，cancelled也要设置
canceled = true;
break;
}
fos.write(buf, 0, numread);
} while (!canceled);// 点击取消就停止下载.
Log.i("DownloadService----------canceled", canceled + "");
fos.close();
is.close();
} catch (Exception e) {
Message msg = mHandler.obtainMessage();
msg.what = 3;
mHandler.sendMessage(msg);
e.printStackTrace();
} finally {
try {
if (fos != null) {
fos.close();
}
is.close();
if (is != null) {
is.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
};
/**
* 创建通知
*/
private void setUpNotification() {
int icon = R.drawable.ic_launcher;
CharSequence tickerText = "开始下载";
long when = System.currentTimeMillis();
mNotification = new Notification(icon, tickerText, when);
;
// 放置在"正在运行"栏目中
mNotification.flags = Notification.FLAG_ONGOING_EVENT;
RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.update_download_notification_layout);
contentView.setTextViewText(R.id.name, notify_name);
// 指定个性化视图
mNotification.contentView = contentView;
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(), PendingIntent.FLAG_UPDATE_CURRENT);
// 指定内容意图
mNotification.contentIntent = contentIntent;
mNotificationManager.notify(NOTIFY_ID, mNotification);
}
}
package com.example.updataapk;
import java.io.File;
import java.io.IOException;
import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Environment;
@SuppressWarnings("deprecation")
@SuppressLint({ "DefaultLocale", "SimpleDateFormat" })
public class Function_Utility {
private static Context mAppContext;
public static void setAppContext(Context context) {
mAppContext = context;
}
public static Context getAppContext() {
return mAppContext;
}
/**
* 下载到SD卡地址
*/
public static String getUpgradePath() {
String filePath = getAppRootPath() + "/upgrade/";
File file = new File(filePath);
if (!file.isDirectory()) {
file.mkdirs();
}
file = null;
return filePath;
}
public static String getAppRootPath() {
String filePath = "/weimicommunity";
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
filePath = Environment.getExternalStorageDirectory() + filePath;
} else {
filePath = getAppContext().getCacheDir() + filePath;
}
File file = new File(filePath);
if (!file.exists()) {
file.mkdirs();
}
file = null;
File nomedia = new File(filePath + "/.nomedia");
if (!nomedia.exists())
try {
nomedia.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
return filePath;
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.updataapk"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.updataapk.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name="com.example.updataapk.DownloadService" >
</service>
</application>
</manifest>
原文地址：http://blog.csdn.net/aaawqqq/article/details/40020525
