从相机，Android捕获图像时获取nullpointer异常？

我在可以正常工作的索尼，三星和HTC设备上测试了我的代码。但这不适用于karbonn等其他设备...

这是我的代码

    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create
    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file

    // start the image capture Intent
    startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

这是onactivity结果代码

   @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            Uri selectedImage = data.getData();
            try {
                String[] filePathColumn = { MediaStore.Images.Media.DATA };
                Cursor cursor = getContentResolver().query(selectedImage,
                        filePathColumn, null, null, null);
                cursor.moveToFirst();
                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                filePath = cursor.getString(columnIndex);
            } catch (Exception e) {
                filePath = selectedImage.getPath();
            }
            Log.v("log", "filePath is : " + filePath);


        } else if (resultCode == RESULT_CANCELED) {
            // User cancelled the image capture
        } else {
            // Image capture failed, advise user
        }
    }
}

这是我得到的异常的日志

    java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=100, result=-1, data=null} to activity {com.pstpl.crime/com.pstpl.crimeverify.VerficationActivity}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:2980)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3023)
at android.app.ActivityThread.access$1100(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1177)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
    Caused by: java.lang.NullPointerException
at com.pstpl.crimeverify.VerficationActivity.onActivityResult(VerficationActivity.java:281)
at android.app.Activity.dispatchActivityResult(Activity.java:4662)
at android.app.ActivityThread.deliverResults(ActivityThread.java:2976)
... 11 more

错误是在URI中它为空。我该如何解决这个问题？