相機死機onactivity結果又失敗

Question

我嘗試使用以下

@AfterPermissionGranted(RC_STORAGE_PERMS) 
private void launchCamera() { 
    Log.d(TAG, "launchCamera"); 

    // Check that we have permission to read images from external storage. 
    String perm = Manifest.permission.WRITE_EXTERNAL_STORAGE; 
    if (!EasyPermissions.hasPermissions(this, perm)) { 
     EasyPermissions.requestPermissions(this, getString(R.string.rationale_storage), 
       RC_STORAGE_PERMS, perm); 
     return; 
    } 


    // Choose file storage location, must be listed in res/xml/file_paths.xml 
    File dir = new File(Environment.getExternalStorageDirectory() + "/photos"); 
    File file = new File(dir, UUID.randomUUID().toString() + ".jpg"); 
    try { 
     // Create directory if it does not exist. 
     if (!dir.exists()) { 
      dir.mkdir(); 
     } 
     boolean created = file.createNewFile(); 
     Log.d(TAG, "file.createNewFile:" + file.getAbsolutePath() + ":" + created); 
    } catch (IOException e) { 
     Log.e(TAG, "file.createNewFile" + file.getAbsolutePath() + ":FAILED", e); 
    } 

    // Create content:// URI for file, required since Android N 
    // See: https://developer.android.com/reference/android/support/v4/content/FileProvider.html 
    mFileUri = FileProvider.getUriForFile(this, 
      "com.mordred.youlift.fileprovider", file); 



    //this is my own set of fixes to grant permission to uri, not sure its neceary though, seems like overkill 
    Context context = this; 
    Intent intent = new Intent(); 
    intent.setAction(Intent.ACTION_SEND); 
    List<ResolveInfo> resInfoList = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY); 
    for (ResolveInfo resolveInfo : resInfoList) { 
     String packageName = resolveInfo.activityInfo.packageName; 
     context.grantUriPermission(packageName, mFileUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION); 
    } 
    // Create and launch the intent 
    context.grantUriPermission(getPackageName(), mFileUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION); 
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    takePictureIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); 
    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mFileUri); 

    //condition suggested by android developers 
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) { 
     startActivityForResult(takePictureIntent, RC_TAKE_PICTURE); 
    } 
} 

相機崩潰時我把圖片上傳圖片到火力存儲和應用程序說「拍照失敗」根據到我的onactivityresult（）函數中的if結構。這裏是它的代碼

@Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     Log.d(TAG, "onActivityResult:" + requestCode + ":" + resultCode + ":" + data); 
     if (requestCode == RC_TAKE_PICTURE) { 
      if (resultCode == RESULT_OK) { 
       if (mFileUri != null) { 
        uploadFromUri(mFileUri); 
       } else { 
        Log.w(TAG, "File URI is null"); 
       } 
      } else { 
       Toast.makeText(this, "Taking picture failed.", Toast.LENGTH_SHORT).show(); 
      } 
     } 
    } 

我的堆棧跟蹤是

08-14 14:22:39.722 26970-26970/com.mordred.youlift D/PictureActivity: launchCamera 
08-14 14:22:39.727 26970-26970/com.mordred.youlift I/dalvikvm: Could not find method android.app.Fragment.requestPermissions, referenced from method pub.devrel.easypermissions.EasyPermissions.executePermissionsRequest 
08-14 14:22:39.727 26970-26970/com.mordred.youlift W/dalvikvm: VFY: unable to resolve virtual method 391: Landroid/app/Fragment;.requestPermissions ([Ljava/lang/String;I)V 
08-14 14:22:39.727 26970-26970/com.mordred.youlift D/dalvikvm: VFY: replacing opcode 0x6e at 0x001d 
08-14 14:22:39.727 26970-26970/com.mordred.youlift I/dalvikvm: Could not find method android.app.Fragment.shouldShowRequestPermissionRationale, referenced from method pub.devrel.easypermissions.EasyPermissions.shouldShowRequestPermissionRationale 
08-14 14:22:39.727 26970-26970/com.mordred.youlift W/dalvikvm: VFY: unable to resolve virtual method 396: Landroid/app/Fragment;.shouldShowRequestPermissionRationale (Ljava/lang/String;)Z 
08-14 14:22:39.727 26970-26970/com.mordred.youlift D/dalvikvm: VFY: replacing opcode 0x6e at 0x001c 
08-14 14:22:39.727 26970-26970/com.mordred.youlift W/EasyPermissions: hasPermissions: API version < M, returning true by default 
08-14 14:22:39.742 26970-26970/com.mordred.youlift D/PictureActivity: file.createNewFile:/storage/sdcard0/photos/a520231b-ff0c-435d-a3db-a3e9816d6726.jpg:true 
08-14 14:22:42.682 26970-26970/com.mordred.youlift W/IInputConnectionWrapper: showStatusIcon on inactive InputConnection 
08-14 14:23:26.567 26970-26983/com.mordred.youlift E/DatabaseUtils: Writing exception to parcel 
                       java.lang.SecurityException: Permission Denial: reading android.support.v4.content.FileProvider uri      content://com.mordred.youlift.fileprovider/external/a520231b-ff0c-435d-a3db-a3e9816d6726.jpg from pid=27383, uid=1000 requires the provider be exported, or grantUriPermission() 
                    at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:332) 
                    at android.content.ContentProvider$Transport.openAssetFile(ContentProvider.java:250) 
                    at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:236) 
                    at android.os.Binder.execTransact(Binder.java:367) 
                    at dalvik.system.NativeStart.run(Native Method) 
08-14 14:23:27.597 26970-26970/com.mordred.youlift D/PictureActivity: onActivityResult:101:0:null 

Answer 1

首先，你遍歷活動是ACTION_SEND，這是不是你做什麼好，因爲你正在使用ACTION_IMAGE_CAPTURE。

二，將Intent.FLAG_GRANT_WRITE_URI_PERMISSION添加到takePictureIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);。

另外請注意，您只需要執行其中的一個：addFlags()或grantUriPermission()，這取決於操作系統版本：

if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.LOLLIPOP) { 
    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 | 
      Intent.FLAG_GRANT_READ_URI_PERMISSION); 
    } 
    } 

（其中i是ACTION_IMAGE_CAPTUREIntent）

Here is the full activity這樣代碼來自。