调用系统下载功能更新apk

Activity中调用系统下载功能并在通知栏显示：

public static final String MIME_TYPE = "application/vnd.android.package-archive";
public long startDownload(String uri, String title, String description, String fileName, String mimeType) {
    DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
    DownloadManager.Request req = new DownloadManager.Request(Uri.parse(uri));

    req.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
    req.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);

    req.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);

    req.allowScanningByMediaScanner();
    req.setVisibleInDownloadsUi(true);
    req.setTitle(title);
    req.setDescription(description);
    req.setMimeType(mimeType);

    return dm.enqueue(req);
}

注册下载完成广播

• Manifest

  <receiver android:name=".receivers.ApkInstallReceiver">
      <intent-filter>
          <action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
      </intent-filter>
  </receiver>
  

• java代码, 接收完成广播后调用系统安装应用界面

  public class ApkInstallReceiver extends BroadcastReceiver {
  
      public static final String TAG = "DownloadManager";
  
      @Override
      public void onReceive(Context context, Intent intent) {
          String action = intent.getAction();
          if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
              long downloadApkId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
              long id = PreferencesUtils.getAppUpgradeDownloadID();
              if (downloadApkId == id) {
                  // 调用系统安装界面
                  ApkUpdateUtils.installApk(context, downloadApkId);
              }
          }
      }
  }
  

用到自定义的工具类ApkUpdateUtils中方法:

public static void installApk(Context context, long downloadApkId) {
    DownloadManager dm = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
    Uri downloadFileUri = dm.getUriForDownloadedFile(downloadApkId);
    installApk(context, downloadFileUri);
}

public static void installApk(Context context, Uri downloadFileUri) {
    try {
        if (downloadFileUri != null) {
            String path = downloadFileUri.getPath();
            Log.d(TAG, downloadFileUri.toString() + "; path=" + path);
            install(context, downloadFileUri);
        } else {
            Log.e(TAG, "Download failed");
        }
    } catch (ActivityNotFoundException e) {
        Log.e(TAG, e.toString());
//            installFromFile(context);
    } catch (Exception e) {
        Log.e(TAG, e.toString());
    }
}

public static void install(Context context, Uri downloadFileUri) {
    Intent install = new Intent(Intent.ACTION_VIEW);
    install.setDataAndType(downloadFileUri, "application/vnd.android.package-archive");
    install.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(install);
}