Android相机意图在某些手机上崩溃应用程序(约占其中的20%)

Question

我已经对这个问题进行了大量的研究,并且看到了一些很好的反应,并找到了一些很好的"解决方案"来解决这个问题.不幸的是,我仍然在某些设备上遇到很多应用程序崩溃.崩溃发生在某人拍摄照片后,相机意图应将信息传递回调用活动.出于我的应用程序的目的,我只是使用新拍摄的照片覆盖任何现有照片,因此我可以使用几乎一个静态路径到文件位置.以下是我如何调用意图:

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        // get the file path from an external class (necessary for galaxy nexus)
        imageFileAndPath = ImageServices.getOutputImageFileUri(cont);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageFileAndPath);
        startActivityForResult(intent, CAMERA_REQUEST_CODE);

imageFileAndPath只是一个URI变量,我是从一个单独的类创建的,因为这解决了另一个问题,即按"完成"或复选标记或者它在特定设备上关闭相机意图没有做任何事情几种设备类型.通过从单独的类创建URI,它可以解决该问题,原因不明.

我的onActivityResult看起来像这样:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(resultCode == Activity.RESULT_OK)
    {
        if (requestCode == CAMERA_REQUEST_CODE) {
            setupImageView();
    imageView = (ImageView) findViewById(R.id.image_view);
            webView.setVisibility(View.GONE);
            imageView.setVisibility(View.VISIBLE);
            button.setVisibility(View.GONE);
            reTakePicButton.setVisibility(View.VISIBLE);
            rl.setVisibility(View.VISIBLE);    
        }
    }
}

因为我不需要动态路径来保存我的照片(因为它覆盖了现有的照片),我只是在我的活动中调用另一种方法来调整照片的大小并相应地旋转它.该方法如下:

private void setupImageView() {     
    imageLocation = Environment.getExternalStorageDirectory().getAbsolutePath() + "/myappphoto/myappphoto.jpg";


    // Get the dimensions of the View
    Display display = getWindowManager().getDefaultDisplay();
    Point size = getDisplaySize(display);
    int targetW = size.x;

    // Get the dimensions of the bitmap
    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
    bmOptions.inJustDecodeBounds = true;

    BitmapFactory.decodeFile(imageLocation, bmOptions);
    int photoW = bmOptions.outWidth;
    int photoH = bmOptions.outHeight;

    // Determine how much to scale down the image
    int scaleFactor = Math.min(photoW / targetW, photoH / targetW);

    // Decode the image file into a Bitmap sized to fill the View
    bmOptions.inJustDecodeBounds = false;
    bmOptions.inSampleSize = scaleFactor;
    bmOptions.inPurgeable = true;

    Bitmap bitmap = BitmapFactory.decodeFile(imageLocation, bmOptions);
    int rotationForImage = getRotationForImage(imageLocation);
    if (rotationForImage != 0) {
        int targetWidth = rotationForImage == 90 || rotationForImage == 270 ? bitmap.getHeight() : bitmap.getWidth();
        int targetHeight = rotationForImage == 90 || rotationForImage == 270 ? bitmap.getWidth() : bitmap.getHeight();




        Bitmap rotatedBitmap = Bitmap.createBitmap(targetWidth, targetHeight, bitmap.getConfig());
        Canvas canvas = new Canvas(rotatedBitmap);
        Matrix matrix = new Matrix();
        matrix.setRotate(rotationForImage, bitmap.getWidth() / 2, bitmap.getHeight() / 2);
        canvas.drawBitmap(bitmap, matrix, new Paint());

        bitmap.recycle();
        bitmap = rotatedBitmap;

    }



    Bitmap resized;

    if(bitmap.getWidth() >= 900 || bitmap.getHeight() >=900)
    {
        int newWidth = Math.round(bitmap.getWidth()/2);
        int newHeight = Math.round(bitmap.getHeight()/2);
        resized = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true);
    }
    else
    {
        resized = bitmap;
    }
    //bitmap.recycle();
    bitmap = resized;


    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 70, bytes);

    try
    {
        File f = new File(imageLocation);
        f.createNewFile();
        //write the bytes in file
        FileOutputStream fo = new FileOutputStream(f);
        fo.write(bytes.toByteArray());
        fo.close();
    }
    catch(java.io.IOException e){}
    imageView.setImageBitmap(bitmap);

}

您可以在该方法顶部看到从相机意图中保存的图像文件的静态路径.

我想调整大小,旋转方法可能导致崩溃,但我不明白为什么会这样,所有看起来都像是非常标准的java编码给我.

任何人都可以看到我在这里做的事情明显错误吗？正如我在这个帖子的标题中所说,我的代码导致大约20%运行它的设备崩溃,这是不可接受的.我可以处理5%而不是20%.

我意识到Android开发在这方面有点噩梦,因为你必须考虑到许多不同的设备类型(制造商,Android等版本),但我认为相机活动应该比这更好地标准化.正如我在这篇帖子的顶部所说的那样,我已经做了很多关于这个问题的研究,并看到了几个与我有类似问题的人,但没有覆盖大多数设备的良好解决方案.我真的不想从零开始编写(我认为我不应该写)我自己的相机.在Android设备上必须更好地实现默认的内置摄像头意图......我还没有找到它.正如您所看到的,我甚至不关心动态创建图像,这应该使这个项目更容易.

TIA

编辑:根据下面的评论,我添加了一个失败的相机堆栈跟踪.它看起来像一个空指针异常.我拍了6张照片,并继续使用调用相机意图的按钮返回,直到最终失败.这是堆栈跟踪:

STACK_TRACE
"java.lang.RuntimeException: Unable to resume activity {com.myapp/com.myapp.MyActivity}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=904, result=-1, data=null} to activity {com.myapp/com.myapp.MyActivity}: java.lang.NullPointerException
    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2124)
    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2139)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1672)
    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2836)
    at android.app.ActivityThread.access$1600(ActivityThread.java:117)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3687)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=904, result=-1, data=null} to activity {com.myapp/com.myapp.MyActivity}: java.lang.NullPointerException
    at android.app.ActivityThread.deliverResults(ActivityThread.java:2536)
    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2111)
    ... 13 more
Caused by: java.lang.NullPointerException
    at com.myapp.MyActivity.onActivityResult(EnterContest.java:257)
    at android.app.Activity.dispatchActivityResult(Activity.java:3908)
    at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
    ... 14 more
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=904, result=-1, data=null} to activity {com.myapp/com.myapp.MyActivity}: java.lang.NullPointerException
    at android.app.ActivityThread.deliverResults(ActivityThread.java:2536)
    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2111)
    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2139)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1672)
    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2836)
    at android.app.ActivityThread.access$1600(ActivityThread.java:117)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3687)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
    at com.myapp.MyActivity.onActivityResult(EnterContest.java:257)
    at android.app.Activity.dispatchActivityResult(Activity.java:3908)
    at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
    ... 14 more
java.lang.NullPointerException
    at com.myapp.MyActivity.onActivityResult(EnterContest.java:257)
    at android.app.Activity.dispatchActivityResult(Activity.java:3908)
    at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2111)
    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2139)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1672)
    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2836)
    at android.app.ActivityThread.access$1600(ActivityThread.java:117)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3687)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
    at dalvik.system.NativeStart.main(Native Method)

Answer 1

也许是猜测，但我认为我遇到了同样的问题，我修复了在新的 AsyncTask 中而不是在 UI 线程中读取位图的问题。

异常发生（显然以随机方式）调用

getContentResolver().notifyChange(selectedImage, null);

其中 selectedImage 是之前设置的 URI

intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo));

您在 com.myapp.MyActivity.onActivityResult(EnterContest.java:257) 中调用了什么？

我有一个使用 ACRA 收集的堆栈跟踪：

java.lang.RuntimeException: Unable to resume activity {com.infonair.meetme.app/com.infonair.meetme.activity.photo.TakePhotoActivity}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=7898789, result=-1, data=Intent { dat=content://media/external/images/media/9 }} to activity {com.infonair.meetme.app/com.infonair.meetme.activity.photo.TakePhotoActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2126)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2141)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1674)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2838)
at android.app.ActivityThread.access$1600(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3737)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:894)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=7898789, result=-1, data=Intent { dat=content://media/external/images/media/9 }} to activity {com.infonair.meetme.app/com.infonair.meetme.activity.photo.TakePhotoActivity}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:2538)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2113)
... 13 more
Caused by: java.lang.NullPointerException
at android.os.Parcel.readException(Parcel.java:1328)
at android.os.Parcel.readException(Parcel.java:1276)
at android.content.IContentService$Stub$Proxy.notifyChange(IContentService.java:458)
at android.content.ContentResolver.notifyChange(ContentResolver.java:912)
at android.content.ContentResolver.notifyChange(ContentResolver.java:898)
at com.infonair.meetme.activity.photo.TakePhotoActivity.onActivityResult(TakePhotoActivity.java:154)
at android.app.Activity.dispatchActivityResult(Activity.java:3908)
at android.app.ActivityThread.deliverResults(ActivityThread.java:2534)
... 14 more
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=7898789, result=-1, data=Intent { dat=content://media/external/images/media/9 }} to activity {com.infonair.meetme.app/com.infonair.meetme.activity.photo.TakePhotoActivity}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:2538)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2113)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2141)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1674)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2838)
at android.app.ActivityThread.access$1600(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3737)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:894)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.os.Parcel.readException(Parcel.java:1328)
at android.os.Parcel.readException(Parcel.java:1276)
at android.content.IContentService$Stub$Proxy.notifyChange(IContentService.java:458)
at android.content.ContentResolver.notifyChange(ContentResolver.java:912)
at android.content.ContentResolver.notifyChange(ContentResolver.java:898)
at com.infonair.meetme.activity.photo.TakePhotoActivity.onActivityResult(TakePhotoActivity.java:154)
at android.app.Activity.dispatchActivityResult(Activity.java:3908)
at android.app.ActivityThread.deliverResults(ActivityThread.java:2534)
... 14 more
java.lang.NullPointerException
at android.os.Parcel.readException(Parcel.java:1328)
at android.os.Parcel.readException(Parcel.java:1276)
at android.content.IContentService$Stub$Proxy.notifyChange(IContentService.java:458)
at android.content.ContentResolver.notifyChange(ContentResolver.java:912)
at android.content.ContentResolver.notifyChange(ContentResolver.java:898)
at com.infonair.meetme.activity.photo.TakePhotoActivity.onActivityResult(TakePhotoActivity.java:154)
at android.app.Activity.dispatchActivityResult(Activity.java:3908)
at android.app.ActivityThread.deliverResults(ActivityThread.java:2534)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2113)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2141)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1674)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2838)
at android.app.ActivityThread.access$1600(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3737)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:894)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
at dalvik.system.NativeStart.main(Native Method)