13

在我的应用程序中,我有一个自定义的自动下载并安装 APK,它的工作原理是这样的

  // auto register for the complete download
     activity.registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));



 // Download the file through DownloadManager
 String destination = Environment.getExternalStorageDirectory() + "/";
    String fileName = "myfile.apk";
    destination += fileName;
    final Uri uri = Uri.parse("file://" + destination);
    DownloadManager.Request request = new  DownloadManager.Request(Uri.parse(apkUrl));
    request.setDescription("description");
    request.setTitle("title");
    request.setDestinationUri(uri);
    final DownloadManager manager = (DownloadManager) activity.getSystemService(Context.DOWNLOAD_SERVICE);
    final long downloadId = manager.enqueue(request);

onComplete = new BroadcastReceiver() {
      public void onReceive(Context ctxt, Intent intent) {

          Intent install = new Intent(Intent.ACTION_VIEW);
          // BEFORE working doing this
          //install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
          //install.setDataAndType(uri,
          //    manager.getMimeTypeForDownloadedFile(downloadId));

          // Using file provider it doesnt work
          Uri apkUri = FileProvider.getUriForFile(AutoUpdate.this,
              "com.myapp", file);
                install.setDataAndType(apkUri,manager.getMimeTypeForDownloadedFile(downloadId));
          activity.startActivity(install);
          activity.unregisterReceiver(this);

      }
    };

安卓清单:

<provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="com.myapp"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths"/>
        </provider>

Provider_path (对不起,由于某种原因,所以削减了路径标签)

外部路径名称=“我的文件夹”路径=“。”/>

当文件完成下载 onComplete 被调用但活动没有开始:

没有找到处理 Intent 的活动 { act=android.intent.action.VIEW dat=content://com.myapp/myfolder/myfile.apk typ=application/vnd.android.package-archive flg=0x4000000 }

使用普通文件时://它确实有效

使用文件提供程序时我缺少什么吗?活动是否因为找不到文件而无法启动?我需要额外的许可吗?(目前我在外部存储上有 INTERNET、READ 和 WRITE)

4

3 回答 3

24

包安装程序仅支持content从 Android 7.0 开始的方案。在此之前 - 尽管有相反的文档 - 包安装程序仅支持file方案。

您将需要根据UriIntent是否在 Android 7.0+ 上运行,例如通过在Build.VERSION.SDK_INT.

于 2016-09-05T14:55:25.370 回答
8

Commonware 是对的,对于那些寻找代码的人:

BroadcastReceiver onComplete = new BroadcastReceiver() {
       public void onReceive(Context ctxt, Intent intent) {

       downloadButton.setEnabled(true);
       downloadButton.setText("Terminado");
       progressbar.setVisibility(View.GONE);

       if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){
            Intent install = new Intent(Intent.ACTION_VIEW);
            install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

            Uri apkURI = FileProvider.getUriForFile(
                     self,
                     self.getApplicationContext()
                     .getPackageName() + ".provider", file);
            install.setDataAndType(apkURI,
                    manager.getMimeTypeForDownloadedFile(downloadId));
            install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            startActivity(install);
       } else{
            String destination = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/";
            String fileName = "surveyevent.apk";
            destination += fileName;
            Uri uri = Uri.parse("file://" + destination);

            Intent install = new Intent(Intent.ACTION_VIEW);
            install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            install.setDataAndType(uri,
                    manager.getMimeTypeForDownloadedFile(downloadId));
            startActivity(install);
       }
       unregisterReceiver(this);
       finish();
  }
};
于 2018-07-01T00:46:16.667 回答
-1

找不到您的提供商,因为

 android:enabled="true"

您的清单中缺少。

但是,它也无法阅读 CW 的其他答案。

于 2016-09-05T14:59:52.217 回答