Android應用檢查版本更新後,在通知欄下載,更新下載進度,下載完成自動安裝,效果圖如下: AndroidManifest文件中的versionCode用來標識版本,在伺服器放一個新版本的apk,versioncode大於當前版本,下麵代碼用來獲取versioncode的值 用當前versionc
Android應用檢查版本更新後,在通知欄下載,更新下載進度,下載完成自動安裝,效果圖如下:
- 檢查當前版本號
AndroidManifest文件中的versionCode用來標識版本,在伺服器放一個新版本的apk,versioncode大於當前版本,下麵代碼用來獲取versioncode的值
PackageInfo packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0); int localVersion = packageInfo.versionCode;
用當前versioncode和服務端比較,如果小於,就進行版本更新
- 下載apk文件
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/** * 下載apk * * @param apkUri */
private void downLoadNewApk(String apkUri, String version) { manager = (NotificationManager) context .getSystemService((context.NOTIFICATION_SERVICE)); notify = new Notification(); notify.icon = R.drawable.ic_launcher; // 通知欄顯示所用到的佈局文件 notify.contentView = new RemoteViews(context.getPackageName(), R.layout.view_notify_item); manager.notify(100, notify); //建立下載的apk文件 File fileInstall = FileOperate.mkdirSdcardFile("downLoad", APK_NAME + version + ".apk"); downLoadSchedule(apkUri, completeHandler, context, fileInstall); }
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FileOperate是自己寫的文件工具類
通知欄顯示的佈局,view_notify_item.xml
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<?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="match_parent" android:layout_marginLeft="10dp" android:background="#00000000" android:padding="5dp" > <ImageView android:id="@+id/notify_icon_iv" android:layout_width="25dp" android:layout_height="25dp" android:src="@drawable/ic_launcher" /> <TextView android:id="@+id/notify_updata_values_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_marginBottom="6dp" android:layout_marginLeft="15dp" android:layout_marginTop="5dp" android:layout_toRightOf="@id/notify_icon_iv" android:gravity="center_vertical" android:text="0%" android:textColor="@color/white" android:textSize="12sp" /> <ProgressBar android:id="@+id/notify_updata_progress" style="@android:style/Widget.ProgressBar.Horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/notify_icon_iv" android:layout_marginTop="4dp" android:max="100" /> </RelativeLayout>
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/** * 連接網路,下載一個文件,並傳回進度 * * @param uri * @param handler * @param context * @param file */
public static void downLoadSchedule(final String uri, final Handler handler, Context context, final File file) { if (!file.exists()) { handler.sendEmptyMessage(-1); return; } // 每次讀取文件的長度 final int perLength = 4096; new Thread() { @Override public void run() { super.run(); try { URL url = new URL(uri); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setDoInput(true); conn.connect(); InputStream in = conn.getInputStream(); // 2865412 long length = conn.getContentLength(); // 每次讀取1k byte[] buffer = new byte[perLength]; int len = -1; FileOutputStream out = new FileOutputStream(file); int temp = 0; while ((len = in.read(buffer)) != -1) { // 寫入文件 out.write(buffer, 0, len); // 當前進度 int schedule = (int) ((file.length() * 100) / length); // 通知更新進度(10,7,4整除才通知,沒必要每次都更新進度) if (temp != schedule && (schedule % 10 == 0 || schedule % 4 == 0 || schedule % 7 == 0)) { // 保證同一個數據只發了一次 temp = schedule; handler.sendEmptyMessage(schedule); } } out.flush(); out.close(); in.close(); } catch (IOException e) { e.printStackTrace(); } } }.start(); }
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handler根據下載進度進行更新
- 更新通知欄進度條
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/** * 更新通知欄 */
private Handler completeHandler = new Handler() { public void handleMessage(android.os.Message msg) { // 更新通知欄 if (msg.what < 100) { notify.contentView.setTextViewText( R.id.notify_updata_values_tv, msg.what + "%"); notify.contentView.setProgressBar(R.id.notify_updata_progress, 100, msg.what, false); manager.notify(100, notify); } else { notify.contentView.setTextViewText( R.id.notify_updata_values_tv, "下載完成"); notify.contentView.setProgressBar(R.id.notify_updata_progress, 100, msg.what, false);// 清除通知欄 manager.cancel(100); installApk(fileInstall); } }; };
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下載完成後調用系統安裝。
- 安裝apk
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/** * 安裝apk * * @param file */
private void installApk(File file) { Intent intent = new Intent(); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setAction(android.content.Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive"); context.startActivity(intent); }
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安裝完成搞定