Question

我有一个名为InstallationHelper的Activity，其工作是从文件系统安装下载的APK。当在下面调用installApk（）时，它会将一个文件路径传递给APK，它位于我们创建的Environment.getExternalStorageDirectory（）目录中。

private void installApk(String filepath)
{
  Intent installAPK = new Intent(Intent.ACTION_VIEW);
  installAPK.setDataAndType(Uri.fromFile(
    new File(filepath)), "application/vnd.android.package-archive");
  startActivityForResult(installAPK, ACTION_INSTALL_APK);
}

protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
  Log.d(LOG_TAG, "Installation activity completed, " +
     "request code: " + requestCode +
     ", result code: " + resultCode +
     ", intent: " + data);
  deleteFile();
  finish();
}

private void deleteFile()
{
  Log.d(LOG_TAG, "Attempting to delete file: " + file.getCanonicalPath());
  ...
}

直到最近谷歌推出了他们的PackageVerificationService（https://support.google.com/accounts/answer/2812853?hl=en）时，这种情况一直很顺利。现在，当调用startActivityForResult（）时，会提示用户使用对话框来处理Intent（即“包安装程序”，验证并安装“（Google）以及Lookout等任何其他过滤器。）代码与默认包安装程序一起使用和Lookout，但是当选择“验证并安装”时，会立即调用onActivityResult（），然后才能进行安装。这是日志：

使用“包安装程序”：

07-26 10:44:01.167: D/InstallationHelper(24528): Attempting to install file: /storage/sdcard0/SC/599173
07-26 10:44:01.167: D/InstallationHelper(24528): startActivityGotResult()
...
07-26 10:44:17.993: I/System.out(23660): siso added package name is package:com.opensignal.weathersignal
07-26 10:44:18.043: I/MediaHubAPP(3068): MHDisable Receiver action = android.intent.action.PACKAGE_ADDED
07-26 10:44:18.043: I/MediaHubAPP(3068): MHDisable Receiver PackageName = com.opensignal.weathersignal
...
07-26 10:44:20.276: I/InstallAppProgress(14735): Finished installing com.opensignal.weathersignal
07-26 10:44:20.336: D/InstallationHelper(24528): Installation activity completed, request code: 1, result code: 0, intent: null
07-26 10:44:20.396: D/InstallationHelper(24528): Attempting to delete file: /storage/sdcard0/SC/599173

使用“验证并安装”：

07-26 10:58:42.366: D/InstallationHelper(24528): Starting InstallationHelper...
07-26 10:58:42.366: D/InstallationHelper(24528): Attempting to install file: /storage/sdcard0/SC/599173
07-26 10:58:42.366: D/InstallationHelper(24528): startActivityGotResult()
07-26 10:58:49.894: D/InstallationHelper(24528): Installation activity completed, request code: 1, result code: 0, intent: null
07-26 10:58:49.934: D/InstallationHelper(24528): Attempting to delete file: /storage/sdcard0/SC/599173
07-26 10:58:49.954: D/Finsky(14410): [47670] PackageVerificationService.getPackageInfo: Error while calculating sha256 for file=file:///storage/sdcard0/SC/599173, error=java.io.FileNotFoundException: /storage/sdcard0/SC/599173: open failed: ENOENT (No such file or directory)
07-26 10:58:50.155: D/InstallationHelper(24528): Installation activity being destroyed.

因为在PackageVerificationService可以解析它之前删除了该文件，所以我收到“解析包时出现问题”错误对话框并且未安装APK。

无论选择Package Installer还是Verify App，传递给onActivityResult（）的参数都是相同的，所以我无法区分这两个。

是否发生这种情况是因为开始安装APK的活动正在最终确定并传递给PackageVerificationService，因此我的onActivityResult（）会过早被调用？有办法防止这种情况吗？

Google PackageVerificationService导致在安装APK期间过早调用onActivityResult（）

0 个答案: