Question

我正在使用DownloadManager从我们的服务器上下载图片，并将文件放在externalFilesDir。

我发送广播意图，因为我不希望这些下载的图像出现在图库中。

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + context.getExternalFilesDir(null))));

我之前只在我的Galaxy S3 Jelly Bean 4.3上测试过它并且它正常工作，但是当我在KitKat 4.4上测试时，它会崩溃应用程序。

是否有更好的方法可以不让从DownloadManager下载的文件出现在手机图库中？

堆栈跟踪

06-05 17:34:41.940: E/AndroidRuntime(15410): FATAL EXCEPTION: main
06-05 17:34:41.940: E/AndroidRuntime(15410): Process: com.walintukai.lfdate, PID: 15410
06-05 17:34:41.940: E/AndroidRuntime(15410): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.intent.action.DOWNLOAD_COMPLETE flg=0x10 pkg=com.walintukai.lfdate (has extras) } in com.walintukai.lfdate.SocketIOService$1@42359f40
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:778)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.os.Handler.handleCallback(Handler.java:733)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.os.Handler.dispatchMessage(Handler.java:95)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.os.Looper.loop(Looper.java:136)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.app.ActivityThread.main(ActivityThread.java:5057)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at java.lang.reflect.Method.invokeNative(Native Method)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at java.lang.reflect.Method.invoke(Method.java:515)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at dalvik.system.NativeStart.main(Native Method)
06-05 17:34:41.940: E/AndroidRuntime(15410): Caused by: java.lang.SecurityException: Permission Denial: not allowed to send broadcast android.intent.action.MEDIA_MOUNTED from pid=15410, uid=10135
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.os.Parcel.readException(Parcel.java:1465)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.os.Parcel.readException(Parcel.java:1419)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.app.ActivityManagerProxy.broadcastIntent(ActivityManagerNative.java:2390)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.app.ContextImpl.sendBroadcast(ContextImpl.java:1127)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.content.ContextWrapper.sendBroadcast(ContextWrapper.java:365)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at com.walintukai.lfdate.SocketIOService$1.onReceive(SocketIOService.java:111)
06-05 17:34:41.940: E/AndroidRuntime(15410):    at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:768)
06-05 17:34:41.940: E/AndroidRuntime(15410):    ... 9 more

Answer 1

谷歌似乎试图阻止KITKAT这件事查看core/rest/AndroidManifest.xml您会注意到广播android.intent.action.MEDIA_MOUNTED现在受到保护。这意味着它只是系统可以发送的广播。

<protected-broadcast android:name="android.intent.action.MEDIA_MOUNTED" />

以下内容适用于所有版本：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    final Intent scanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
    final Uri contentUri = Uri.fromFile(outputFile); 
    scanIntent.setData(contentUri);
    sendBroadcast(scanIntent);
} else {
    final Intent intent = new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory()));
    sendBroadcast(intent);
}

如果以上操作无效，请尝试以下操作：

根据这个post你需要另一种方法来解决它与使用MediaScannerConnection或ACTION_MEDIA_SCANNER_SCAN_FILE一样。

MediaScannerConnection.scanFile(this, new String[] {

file.getAbsolutePath()},

null, new MediaScannerConnection.OnScanCompletedListener() {

public void onScanCompleted(String path, Uri uri)

{


}

});

Answer 2

我知道它已经很晚了，但试试这可以在所有版本中使用：

   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                    Intent mediaScanIntent = new Intent(
                            Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                    Uri contentUri = Uri.fromFile(out); \\out is your output file
                    mediaScanIntent.setData(contentUri);
                    this.sendBroadcast(mediaScanIntent);
                } else {
                    sendBroadcast(new Intent(
                            Intent.ACTION_MEDIA_MOUNTED,
                            Uri.parse("file://"
                                    + Environment.getExternalStorageDirectory())));
                }

java.lang.SecurityException：Permission Denial：不允许仅在KitKat上发送广播android.intent.action.MEDIA_MOUNTED

2 个答案: