捕获照片时模拟器崩溃(NullPointerException)

拍摄照片时出现一些问题.

到目前为止,我可以从相机,仿真器和真实设备中拍摄照片,而不会出现问题.但是这些图片已保存在默认路径上.

我想编辑该路线,所以我可以自己设定.

我这样做是这样的:

File folder = new File(Environment.getExternalStorageDirectory().toString()+"/ImagesFolder/");
            folder.mkdirs();

            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            Uri uriSavedImage=Uri.fromFile(new File(Environment.getExternalStorageDirectory().toString()+"/ImagesFolder/imatge.jpg"));
            cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage);

            startActivityForResult(cameraIntent, 1888);

该产品正在实际的设备上运行,即索尼爱立信Xperia Ray.它创建文件夹,并将图像保存在那里.

但是问题出在模拟器上.恐怕这会在其他设备上发生.

这是logcat:

01-06 21:35:21.115: E/AndroidRuntime(1565): FATAL EXCEPTION: main
01-06 21:35:21.115: E/AndroidRuntime(1565): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=264032, result=-1, data=null} to activity {com.exercise.AndroidViewPager/com.exercise.AndroidViewPager.AndroidViewPagerActivity}: java.lang.NullPointerException
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3319)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:3362)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.app.ActivityThread.access$1100(ActivityThread.java:141)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1282)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.os.Looper.loop(Looper.java:137)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.app.ActivityThread.main(ActivityThread.java:5039)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at java.lang.reflect.Method.invokeNative(Native Method)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at java.lang.reflect.Method.invoke(Method.java:511)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at dalvik.system.NativeStart.main(Native Method)
01-06 21:35:21.115: E/AndroidRuntime(1565): Caused by: java.lang.NullPointerException
01-06 21:35:21.115: E/AndroidRuntime(1565):     at com.exercise.AndroidViewPager.MyFragmentD.onActivityResult(MyFragmentD.java:52)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.support.v4.app.FragmentActivity.onActivityResult(FragmentActivity.java:152)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.app.Activity.dispatchActivityResult(Activity.java:5293)
01-06 21:35:21.115: E/AndroidRuntime(1565):     at android.app.ActivityThread.deliverResults(ActivityThread.java:3315)
01-06 21:35:21.115: E/AndroidRuntime(1565):     ... 11 more

碰撞:

01-06 21:35:21.115: E/AndroidRuntime(1565): Caused by: java.lang.NullPointerException
01-06 21:35:21.115: E/AndroidRuntime(1565):     at com.exercise.AndroidViewPager.MyFragmentD.onActivityResult(MyFragmentD.java:52)

来自这里:

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if( requestCode == 1888 && resultCode == -1) { //-1 = TOT HA ANAT BE.
        Bitmap photo = (Bitmap) data.getExtras().get("data");
        Log.d("debugging",""+photo.getHeight());
        Log.d("debugging",""+photo.getWidth());
        ((ImageView) myFragmentView.findViewById(R.id.fotoCapturada)).setImageBitmap(photo);
    }
}

究竟:

Bitmap photo = (Bitmap) data.getExtras().get("data");

经过一番研究,我发现并不清楚…

您能在这个问题上帮助我吗?

谢谢.

最佳答案
由于您的数据额外方法无效,因此您可以尝试在启动Intent时存储文件的字段或路径.

File resultingFile;//This will be in your class definition

File folder = new File(Environment.getExternalStorageDirectory().toString()+"/ImagesFolder/");
folder.mkdirs();

Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
resultingFile = new File(folder.toString() + "/image.jpg");
Uri uriSavedImage=Uri.fromFile(resultingFile);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage);

startActivityForResult(cameraIntent, 1888);

因此,当您输入onActivityResult时,您可以针对RESULT_OK和RESULT_CANCELED测试resultCode.当我使用onActivityResult时,我会这样做:

if(requestCode == 1888){
  if(resultCode == RESULT_OK){ //Called when the user saves the image
     if(resultingFile.exists(){
       Bitmap photo = BitmapFactory.decodeFile(resultingFile.getPath()); 
       ((ImageView) myFragmentView.findViewById(R.id.fotoCapturada)).setImageBitmap(photo);
     }
  }else if(resultCode == RESULT_CANCELED){ //Called when the user presses back or cancels the saving of the image

  }
}

转载注明原文:捕获照片时模拟器崩溃(NullPointerException) - 代码日志