java - 从BroadcastReciever内部的startActivityForResult获取结果，调用ACTION_INSTALL_PACKAGE Intent

Question

我正在创建一个应用程序，用户可以从中下载其他应用程序并安装它们。现在它工作正常，但安装后它不会删除apk。我尝试过使用 BroadcastRecievers 但他们似乎不明白应用程序何时已安装。

目前我正在尝试startActivityForResult，完成后，从文件中删除apk。

public class Updater {
    private static BroadcastReceiver onDownloadComplete = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            Logger.d("Download completed.");
            File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getPath(), downloadApp.getDownloadKey());
            Logger.i("Opening: " + file.getAbsolutePath());

            Intent openDownloadIntent = getOpenDownloadedApkIntent(context, file);

            RelativeLayout progressView = progressViewReference.get();
            if (progressView!= null) {
                progressView.setVisibility(View.GONE);
            }

            try {
                ((Activity) context).startActivityForResult(openDownloadIntent, getResultCode());


            } catch (ActivityNotFoundException e) {
                // TODO: more robust error handling (show dialog or something)
                Logger.e("Exception when launching download intent, message:" + e.getMessage());
            }
        }
    };

    private static Intent getOpenDownloadedApkIntent(Context context, File file) {

        // The type of intent to use to open the downloaded apk changed in Android N (7.0)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            Uri path = FileProvider.getUriForFile(context,
                    context.getApplicationContext().getPackageName() + ".utils.DownloadedFileProvider",
                    file);
            Intent intent = new Intent(Intent.ACTION_INSTALL_PACKAGE);
            intent.putExtra(Intent.EXTRA_RETURN_RESULT, true);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.setData(path);
            return intent;
        } else {
            Uri uri = Uri.fromFile(file);
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setDataAndType(uri, "application/vnd.android.package-archive");
            return intent;
        }
    }
}

所以我有 Updater 类，其中有两个方法(请参阅上面的代码)。并且此类正在由适配器调用，因此没有地方放置 onActivityResult。我尝试将其放在调用 Adapter 的 Activity 中，后者调用 Updater 类，但即使使用 也无法到达那里EXTRA_RETURN_RESULT

所以我的问题是..安装完成后如何在这里调用onActivityResult。

Answer 1

这是您 Activity 的伪代码

class DownloadActivity extends AppCompatActivity {
  // some of your code here

  @Override
  protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
// in here you are checking if requestCode is equal to Intent.ACTION_INSTALL_PACKAGE
   if(requestCode == Intent.ACTION_INSTALL_PACKAGE and resultCode == ResultCode.OK) {
     // Start activity for deleting file
    startActivityForResult(Intente.ACTION_DELETE);
   }

  if(requestCode == Intent.ACTION_DELETE and resultCode == ResultCode.OK) {
     // Handling actions after deleted
   } 
  }
}

当操作结束时，OnActivityResult 由 android 调用。您不必仅在您定义必须执行的操作的方法内调用此方法。

那些 onDownloadComplete 和 getOpenDownloadedApkIntent 是在哪里定义和调用的？