android - 调用相机 Intent 后 onActivityResult 中的 NullPointerException

Question

这是我的问题:我需要将照片保存到默认相机位置，然后将其复制到我的私有(private)位置，添加 GPS 标签进行复制，然后删除原始照片。为什么这么绕？因为在某些设备上，当在请求 Intent 中使用 MediaStore.EXTRA_OUTPUT 时，照片无论如何都会保存在默认位置。现在，当应用程序接近完成时，在新设备(摩托罗拉 MB526)上进行测试时，它会在接受拍照后崩溃。同样的事情发生在模拟器上。

问题是，在 onActivityResult(int requestCode, int resultCode, Intent data) data.getData() 中返回 null。

所以我的问题是 - 是否有任何统一的方法可以将图片保存在给定位置而不是其他地方？

编辑:

捕捉图像 Intent

protected void takePhotos() {
    Intent imageIntent = new Intent(
            android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(imageIntent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
}

和结果

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
            if (resultCode == RESULT_OK && data != null) {
                Uri capturedImageUri = data.getData();
                Log.d("cameraResult", "data =" + data.getDataString());
                String capturedPicFilePath = getRealPathFromURI(capturedImageUri);
                writeImageData(capturedImageUri, capturedPicFilePath);
            } else if (resultCode == RESULT_CANCELED) {
                Toast.makeText(this, "Picture not taken",
                        Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "Picture not taken",
                        Toast.LENGTH_SHORT).show();
            }
        }
    }
}

public String getRealPathFromURI(Uri contentUri) {
    String[] projx = { MediaStore.Images.Media.DATA };
    Cursor cursor;
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.GINGERBREAD_MR1) {
        CursorLoader loader = new CursorLoader(this, contentUri, projx,
                null, null, null);
        cursor = loader.loadInBackground();
    } else {
        cursor = this.managedQuery(contentUri, projx, null, null, null);
    }
    int column_index = cursor
            .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}

logCat 输出:

07-23 18:42:26.486: D/cameraResult(1744): data =null
07-23 18:42:26.486: D/AndroidRuntime(1744): Shutting down VM
07-23 18:42:26.486: W/dalvikvm(1744): threadid=1: thread exiting with uncaught exception (group=0xb70334f0)
07-23 18:42:26.496: E/AndroidRuntime(1744): FATAL EXCEPTION: main
07-23 18:42:26.496: E/AndroidRuntime(1744): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1513, result=-1, data=Intent { act=inline-data (has extras) }} to activity {arios.e_gps/arios.e_gps.photos.PhotoListAct}: java.lang.NullPointerException
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.app.ActivityThread.access$2000(ActivityThread.java:117)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.os.Looper.loop(Looper.java:130)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.app.ActivityThread.main(ActivityThread.java:3683)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at java.lang.reflect.Method.invokeNative(Native Method)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at java.lang.reflect.Method.invoke(Method.java:507)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at dalvik.system.NativeStart.main(Native Method)
07-23 18:42:26.496: E/AndroidRuntime(1744): Caused by: java.lang.NullPointerException
07-23 18:42:26.496: E/AndroidRuntime(1744):     at arios.e_gps.photos.PhotoListAct.getRealPathFromURI(PhotoListAct.java:316)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at arios.e_gps.photos.PhotoListAct.onActivityResult(PhotoListAct.java:165)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.app.Activity.dispatchActivityResult(Activity.java:3908)
07-23 18:42:26.496: E/AndroidRuntime(1744):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2528)
07-23 18:42:26.496: E/AndroidRuntime(1744):     ... 11 more

Answer 1

请求缩略图时，Data.getData() 不为空。将图片记录到任何位置时，它始终为空。