本文主要是介绍IntentService+Notifcation实现应用app后台下载完成后并安装(已适配8.0)，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
转载自IntentService+Notifcation实现应用app后台下载完成后并安装(已适配8.0)
现在已兼容8.0的通知栏显示,确保你的targetSdkVersion 是26或以上
以下为8.0的显示图片:
app的更新模块放在后台服务可以大大提高app的体验,采用IntentService这种google为我们封装好的用于执行服务中有网络操作的类并搭配Notification来实现一下(下载工具用的是自带的URLConnection,因为Retrofit+rxjava并没有提供进度的回调,网上也有很多改进的方案,可以自定义让retrofit+rxjava实现进度的回调,在此,没有采用)
效果图如下:(看了一下淘宝的更新,所以就成这样的界面了,)
代码:自定义的IntentService类
/*** 更新包下载安装服务*/
public class UpdateService extends IntentService {private static final int NOTIFY_DOWNLOAD= 0;private static final int NOTIFY_FINISH = 1;private static final String PENDING_INSTALL_ACTION = "gaoxin.com.inforindustry.click.toinstall";private Context mContext;private String apkUrl;public UpdateService() {super("UpdateService");}private NotificationUtils notificationUtils;private File downapkfile;private Handler mHandler = new Handler(new Handler.Callback() {@Overridepublic boolean handleMessage(Message msg) {switch (msg.what){case 0://正在下载中RemoteViews contentView = notificationUtils.getNotification().contentView;contentView.setTextViewText(R.id.notify_tv, "更新包下载中...");contentView.setProgressBar(R.id.notify_progress_pb, 100, msg.arg1, false);contentView.setTextViewText(R.id.notify_progress_tv,msg.arg1+"%");// 更新UInotificationUtils.getManager().notify(NOTIFY_DOWNLOAD,notificationUtils.getNotification());break;case 1:notificationUtils.cancelNotification(NOTIFY_DOWNLOAD);createNotification(NOTIFY_FINISH);break;}return true;}});@Overrideprotected void onHandleIntent(Intent intent) {if (intent != null) {apkUrl = intent.getStringExtra("apkurl");handleActionFoo(apkUrl);}}private void handleActionFoo(String param1) {if(NetworkUtils.isConnected()){createNotification(NOTIFY_DOWNLOAD);try {DownApk(param1);} catch (Exception e) {e.printStackTrace();}}}//发送消息进行更新进度条public void sendMessage(int what,int mprogress) {Message msg0 = mHandler.obtainMessage();msg0.what = what;msg0.arg1 = mprogress;mHandler.sendMessage(msg0);}private void DownApk(String param1) {int oldProcess = 0;if (SDCardUtils.isSDCardEnable()){downapkfile = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/industry.apk");try {URL url = new URL(param1.trim());HttpURLConnection connection = (HttpURLConnection) url.openConnection();if (connection.getResponseCode() == 200){InputStream inputStream = connection.getInputStream();FileOutputStream fos = new FileOutputStream(downapkfile);//总长度int totalLength = connection.getContentLength();//已下载的长度int currentLength = 0;byte[] bytes = new byte[512];connection.connect();int flag = 0;while (flag < 100){if (inputStream != null){int read = inputStream.read(bytes);if (read <= 0){sendMessage(1,0);break;}else {fos.write(bytes,0,read);currentLength += read;int mprogress = (int) ((currentLength*100)/totalLength);if(oldProcess <= mprogress-5 ){// 避免notifymanager ANR，每下载百分之5才进行通知一次oldProcess =mprogress;sendMessage(0, mprogress);}}}}fos.close();inputStream.close();}connection.disconnect();} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}private void createNotification(int notifyId) {switch (notifyId){case NOTIFY_DOWNLOAD:RemoteViews remoteViews = new RemoteViews(AppUtils.getAppPackageName(),R.layout.notify_custom_view_layout);remoteViews.setTextViewText(R.id.notify_tv,"正在下载...");remoteViews.setProgressBar(R.id.notify_progress_pb,100,0,false);remoteViews.setTextViewText(R.id.notify_progress_tv,"0%");notificationUtils.sendNotification(notifyId,"","",remoteViews,null);break;case NOTIFY_FINISH:Intent intent = new Intent(getApplicationContext(),NotificationBroadCast.class);intent.setAction(PENDING_INSTALL_ACTION);intent.putExtra("notifyId",NOTIFY_FINISH);PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext,0,intent,PendingIntent.FLAG_ONE_SHOT);notificationUtils.sendNotification(notifyId,"点击安装","更新包已下载完成",null,pendingIntent);break;default:break;}}@Overridepublic void onCreate() {super.onCreate();mContext = this;//初始化通知窗口管理notificationUtils = new NotificationUtils(getApplicationContext());}
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NotificationUtils,用来进行适配8.0系统
public class NotificationUtils extends ContextWrapper {private NotificationManager mManager;public static final String ANDROID_CHANNEL_ID = "com.gaoxin.industry.ANDROID";public static final String ANDROID_CHANNEL_NAME = "ANDROID CHANNEL";private Notification notification;public NotificationUtils(Context base) {super(base);if (Build.VERSION.SDK_INT >= 26){createChannels();}}@RequiresApi(api = Build.VERSION_CODES.O)public void createChannels() {// create android channelNotificationChannel androidChannel = new NotificationChannel(ANDROID_CHANNEL_ID,ANDROID_CHANNEL_NAME, NotificationManager.IMPORTANCE_DEFAULT);// Sets whether notifications posted to this channel should display notification lightsandroidChannel.enableLights(true);// Sets whether notification posted to this channel should vibrate.androidChannel.enableVibration(true);// Sets the notification light color for notifications posted to this channelandroidChannel.setLightColor(Color.GREEN);// Sets whether notifications posted to this channel appear on the lockscreen or notandroidChannel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);getManager().createNotificationChannel(androidChannel);}public NotificationManager getManager() {if (mManager == null) {mManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);}return mManager;}@RequiresApi(api = Build.VERSION_CODES.O)public Notification.Builder getAndroidChannelNotification(String title,String content) {return new Notification.Builder(getApplicationContext(), ANDROID_CHANNEL_ID).setContentTitle(title).setContentText(content).setSmallIcon(android.R.drawable.stat_notify_more);}public NotificationCompat.Builder getNotification_25(String title, String content){return new NotificationCompat.Builder(getApplicationContext()).setContentTitle(title).setContentText(content).setSmallIcon(android.R.drawable.stat_notify_more);}public void sendNotification(int id,String title, String content, RemoteViews remoteViews, PendingIntent intent){if (Build.VERSION.SDK_INT>=26){notification = getAndroidChannelNotification(title, content).setCustomContentView(remoteViews).setContentIntent(intent).build();getManager().notify(id,notification);}else{notification = getNotification_25(title, content).setCustomContentView(remoteViews).setContentIntent(intent).build();getManager().notify(id,notification);}}public void cancelNotification(int id){getManager().cancel(id);}public Notification getNotification(){if (notification != null){return notification;}return null;}
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需要注意的点: Notification必须设置smallIcon这个属性,否则会报错,
如果是下载完成后不希望自动安装,而是点击后进行安装,可以使用PendingIntent这个类来进行触发,否则点击后是没有什么效果的,必须传递意图Intent
Android 8.0在安装应用的时候需要权限
8.0系统设置中不再提供是否允许安装未知来源的应用这个选项,所以在进行安装的时候,一定注意这个权限,否则会报错
其他注意事项:清单文件中必须包含provider
<provider
android:name="android.support.v4.content.FileProvider"android:authorities="包名.fileprovider"android:exported="false"android:grantUriPermissions="true"><meta-data
android:name="android.support.FILE_PROVIDER_PATHS"android:resource="@xml/file_paths" /></provider>- 1
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res文件夹下建立xml文件夹
在xml中新建file_paths.xml文件,如下:
<?xml version="1.0" encoding="utf-8"?>
<paths><external-path
name="external_storage_root"path="." />
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安装
public static void installApp(final File file, final String authority) {if (!isFileExists(file)) return;Utils.getApp().startActivity(IntentUtils.getInstallAppIntent(file, authority, true));}
public static Intent getInstallAppIntent(final File file,final String authority,final boolean isNewTask) {if (file == null) return null;Intent intent = new Intent(Intent.ACTION_VIEW);Uri data;String type = "application/vnd.android.package-archive";if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {data = Uri.fromFile(file);} else {intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);data = FileProvider.getUriForFile(Utils.getApp(), authority, file);}intent.setDataAndType(data, type);return getIntent(intent, isNewTask);}- 1
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布局也贴一下,根据自己的需求
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:background="@color/white_alpha_6"><ImageView
android:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/notify_download_iv"android:src="@mipmap/ic_launcher_round"android:layout_marginTop="12dp"android:layout_centerVertical="true"android:layout_marginRight="8dp"/><TextView
android:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/notify_tv"android:textColor="@color/black"android:layout_marginTop="8dp"android:layout_toRightOf="@+id/notify_download_iv"android:text="正在下载..."/><ProgressBar
android:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/notify_progress_pb"style="?android:attr/progressBarStyleHorizontal"android:layout_below="@+id/notify_tv"android:layout_toRightOf="@+id/notify_download_iv"/><TextView
android:layout_width="wrap_content"android:layout_height="wrap_content"android:textSize="12sp"android:textColor="@color/black"android:id="@+id/notify_progress_instruction_tv"android:layout_below="@+id/notify_progress_pb"android:text="客户端已经下载了"android:layout_toRightOf="@+id/notify_download_iv"/><TextView
android:layout_width="wrap_content"android:layout_height="wrap_content"android:textSize="12sp"android:id="@+id/notify_progress_tv"android:textColor="@color/black"android:layout_toRightOf="@+id/notify_progress_instruction_tv"android:layout_below="@+id/notify_progress_pb"android:text="50%"/></RelativeLayout>- 1
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启动服务:
/*** 传入url*/Intent intent = new Intent(MainActivity.this,UpdateService.class);intent.putExtra("apkurl", updataVersionUrl);startService(intent);- 1
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下载完成后,点击事件的处理,采用了BroadCastReceiver方式
public class NotificationBroadCast extends BroadcastReceiver {private File downFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/industry.apk");private static final String INSTALL_ACTION = "包名.click.toinstall";@Overridepublic void onReceive(Context context, Intent intent) {String action = intent.getAction();if (action.equals(INSTALL_ACTION)){int notifyId = intent.getIntExtra("notifyId", 0);NotificationManager manager = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);manager.cancel(notifyId);if (FileUtils.isFileExists(downFile) && downFile.length() > 0) {AppUtils.installApp(downFile, "gaoxin.com.inforindustry.fileprovider");}}}
}
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最后不要忘记在清单文件中注册一下,
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