的Android FileProvider有照片採取意圖給人以產生java.io.IOException：寫失敗：EPIPE（碎管）

Question

我有新FileProvider API的一個問題：

我有這樣的代碼來生成從文件中的URI：

public Uri generateUri(String authority) { 
      File storageDir = context.getExternalFilesDir(Environment.DIRECTORY_PICTURES); 
      File imageFile = fileHelper.from(storageDir, PHOTO_NAME); 

      if (!imageFile.exists() && !imageFile.createNewFile()) { 
       throw new Exception("Can't create capture file"); 
      } 
      Uri sharedUri = ExtendedFileProvider.getUriForFile(context, authority, imageFile); 
      return sharedUri; 
    } 

的URI它是正確的，現在我打開相機意圖這樣>

Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
      if (takePictureIntent.resolveActivity(context.getPackageManager()) != null) { 
       takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, result); 
       context.grantUriPermission(context.getPackageName(), result, 
         Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 
       context.startActivityForResult(takePictureIntent, BaseActivity.SUBACTIVITY_TAKE_PHOTO); 
      } 

然後，相機它打開了，當照片抽放並確認後，我有：

01-10 15:37:27.236 W/FastPrintWriter: Write failure 
             java.io.IOException: write failed: EPIPE (Broken pipe) 
              at libcore.io.IoBridge.write(IoBridge.java:501) 
              at java.io.FileOutputStream.write(FileOutputStream.java:316) 
              at com.android.internal.util.FastPrintWriter.flushBytesLocked(FastPrintWriter.java:336) 
              at com.android.internal.util.FastPrintWriter.flushLocked(FastPrintWriter.java:359) 
              at com.android.internal.util.FastPrintWriter.flush(FastPrintWriter.java:394) 
              at android.view.ThreadedRenderer.dumpGfxInfo(ThreadedRenderer.java:613) 
              at android.view.WindowManagerGlobal.dumpGfxInfo(WindowManagerGlobal.java:556) 
              at android.app.ActivityThread$ApplicationThread.dumpGfxInfo(ActivityThread.java:1175) 
              at android.app.ApplicationThreadNative.onTransact(ApplicationThreadNative.java:577) 
              at android.os.Binder.execTransact(Binder.java:565) 
             Caused by: android.system.ErrnoException: write failed: EPIPE (Broken pipe) 
              at libcore.io.Posix.writeBytes(Native Method) 
              at libcore.io.Posix.write(Posix.java:273) 
              at libcore.io.BlockGuardOs.write(BlockGuardOs.java:319) 
              at libcore.io.IoBridge.write(IoBridge.java:496) 
              at java.io.FileOutputStream.write(FileOutputStream.java:316)  
              at com.android.internal.util.FastPrintWriter.flushBytesLocked(FastPrintWriter.java:336)  
              at com.android.internal.util.FastPrintWriter.flushLocked(FastPrintWriter.java:359)  
              at com.android.internal.util.FastPrintWriter.flush(FastPrintWriter.java:394)  
              at android.view.ThreadedRenderer.dumpGfxInfo(ThreadedRenderer.java:613)  
              at android.view.WindowManagerGlobal.dumpGfxInfo(WindowManagerGlobal.java:556)  
              at android.app.ActivityThread$ApplicationThread.dumpGfxInfo(ActivityThread.java:1175)  
              at android.app.ApplicationThreadNative.onTransact(ApplicationThreadNative.java:577)  
              at android.os.Binder.execTransact(Binder.java:565) 

我已經做了使用FileProvider所需的所有清單的變化和它的工作一個星期前.. 任何想法？

Answer 1

context.grantUriPermission(context.getPackageName(), result, 
        Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 

此代碼表示「授予我自己的應用程序權限以使用我自己的應用程序的數據」。這不是你想要的。如果您想使用grantUriPermission()，那麼軟件包名稱需要針對您授權的應用程序。

另外，有更簡單的選擇上較新的API級別：

i.putExtra(MediaStore.EXTRA_OUTPUT, outputUri); 

if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.LOLLIPOP) { 
    i.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 
} 
else if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.JELLY_BEAN) { 
    ClipData clip= 
    ClipData.newUri(getContentResolver(), "A photo", outputUri); 

    i.setClipData(clip); 
    i.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 
} 
else { 
    List<ResolveInfo> resInfoList= 
    getPackageManager() 
     .queryIntentActivities(i, PackageManager.MATCH_DEFAULT_ONLY); 

    for (ResolveInfo resolveInfo : resInfoList) { 
    String packageName = resolveInfo.activityInfo.packageName; 
    grantUriPermission(packageName, outputUri, 
     Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 
    } 
} 

在這裏，我：

• 只需使用addFlags()，如果應用程序是在Android 5.0以上版本

• 運行

  使用ClipData，如果應用在Android 4.1-4.4上運行

• 遍歷所有可能的相機應用程序和用戶授予權限，以每個人，在Android 4.0及以上

我覆蓋代碼更this blog post片段。