我正在尝试捕获图像并将其保存在图库中.为此在onCreate我的代码

    Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
    File photo = new File(Environment.getExternalStorageDirectory(), "Pic.jpg");
    imageUri = Uri.fromFile(photo);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
    startActivityForResult(intent, TAKE_PICTURE);

和

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK && requestCode == TAKE_PICTURE) {
        Log.v("data", "data: " + data);
        Bundle extras = data.getExtras();
        if (extras.containsKey("data")) {
            bitmap = (Bitmap) extras.get("data");
            // ByteArrayOutputStream baos = new ByteArrayOutputStream();
            // bmp.compress(Bitmap.CompressFormat.PNG, 100, baos);
            // byte[] image = baos.toByteArray();
            if (bitmap != null) {
                // BitmapFactory.Options options = new
                // BitmapFactory.Options();
                // options.inSampleSize = 5;
                // Bitmap myImage = BitmapFactory.decodeByteArray(image, 0,
                // image.length, options);
                imageView.setImageBitmap(bitmap);
            }
        } else {
            Toast.makeText(getBaseContext(), "Please capture again", Toast.LENGTH_LONG).show();
        }
        showPopUpForUpload();
    }
}

现在我能够捕捉到图像,但之后我就会收到错误

12-17 15:28:56.090: E/AndroidRuntime(4684): FATAL EXCEPTION: main
12-17 15:28:56.090: E/AndroidRuntime(4684): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1888, result=-1, data=null} to activity {com.example.fashiongirl/com.example.fashiongirl.HomeActivity}: java.lang.NullPointerException
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2744)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:2787)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.app.ActivityThread.access$2000(ActivityThread.java:122)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1032)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.os.Looper.loop(Looper.java:132)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.app.ActivityThread.main(ActivityThread.java:4025)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at java.lang.reflect.Method.invokeNative(Native Method)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at java.lang.reflect.Method.invoke(Method.java:491)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at dalvik.system.NativeStart.main(Native Method)
12-17 15:28:56.090: E/AndroidRuntime(4684): Caused by: java.lang.NullPointerException
12-17 15:28:56.090: E/AndroidRuntime(4684):     at com.example.fashiongirl.HomeActivity.onActivityResult(HomeActivity.java:47)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.app.Activity.dispatchActivityResult(Activity.java:4541)
12-17 15:28:56.090: E/AndroidRuntime(4684):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2740)
12-17 15:28:56.090: E/AndroidRuntime(4684):     ... 11 more

空指针异常在线

Bundle extras = data.getExtras();

那么问题是什么？

解决方法:

我认为它是Android 4.0版的一个问题.

试着删除,

File photo = new File(Environment.getExternalStorageDirectory(), "Pic.jpg");
imageUri = Uri.fromFile(photo);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);

当您调用Capture intent时.现在你的结果包onActivityResult()不是NULL.

实际上,当您向Camera Intent提供MediaStore.EXTRA_OUTPUT参数时,相机应用程序不会使用捆绑数据进行回调. (我在Android 4.0中发现了这个问题)

您必须从Uri获取Image文件,并将其设置为MediaStore.EXTRA_OUTPUT参数.

更新：

或者使用下面的pathFromUri()方法并传递你设置为相机意图的Uri并获取真实文件路径,现在为此你不必使用Bundle extras = data.getExtras();

private String pathFromUri(Uri imageUri) {
    String[] filePathColumn = { MediaStore.Images.Media.DATA };
    Cursor cursor = getContentResolver().query(imageUri, filePathColumn,
                null, null, null);
    cursor.moveToFirst();
    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
    String filePath = cursor.getString(columnIndex);
    return filePath ;
}