Question

         if (resultCode == Activity.RESULT_OK && requestCode == 1
                && null != data)
            {               
            Uri selectedImage = data.getData();
            InputStream imageStream =getActivity().getContentResolver().openInputStream(selectedImage);
            System.out.println("dfsdf");
            Bitmap bitmap2 = BitmapFactory.decodeStream(imageStream);

基本上是onactivityresult这就是我如何阅读，我得到选定的图像为null。当我从文件管理器（/sdcard）中选择我的图像时......当我从uhf播放器中选择..我从相机或屏幕截图中选择时，它工作正常

               Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(
                        Intent.createChooser(intent, "Select Picture"), 1);

Answer 1

//Here is some sample code to pick photo from gallery or get from camera.

//声明以下内容

 private static final int SELECT_PHOTO = 100;
     private static final int CAMERA_REQUEST=101;

//调用startactivityforresult的方式从图库（SD卡）中选择照片

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
    photoPickerIntent.setType("image/*");
    startActivityForResult(photoPickerIntent, SELECT_PHOTO);

//调用startactivityforresult的方式从相机中选择照片

 Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
         startActivityForResult(cameraIntent, CAMERA_REQUEST);

// onActivityResult方法

 @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
            super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

                if(resultCode == RESULT_OK){  

                //pick image from gallery(sd card)  
                    if(requestCode==SELECT_PHOTO)
                    {

                    Uri selectedImage = imageReturnedIntent.getData();
                    InputStream imageStream = null;
                    try {
                        imageStream = getContentResolver().openInputStream(selectedImage);
                    } catch (FileNotFoundException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    Bitmap yourSelectedImage = BitmapFactory.decodeStream(imageStream);
                    imageView_Babypic.setImageBitmap(yourSelectedImage);
                }
                    //pick image from camera
                    else if (requestCode==CAMERA_REQUEST) {
                         Bitmap photo = (Bitmap) imageReturnedIntent.getExtras().get("data"); 
                         imageView_Babypic.setImageBitmap(photo);
                    }


                }

            }

//最后使用它在你的清单文件中使用相机

 <uses-permission android:name="android.permission.CAMERA"/>

Answer 2

使用此代码启动意向选择器 -

Intent pickIntent = new Intent();
                pickIntent.setType("image/*");
                pickIntent.setAction(Intent.ACTION_GET_CONTENT);

                Intent takePhotoIntent = new Intent(
                        MediaStore.ACTION_IMAGE_CAPTURE);

                String pickTitle = this
                        .getResources()
                        .getString(R.string.edit_general_select_or_take_picture); // Or
                                                                                    // get
                                                                                    // from
                // strings.xml
                Intent chooserIntent = Intent.createChooser(pickIntent,
                        pickTitle);
                chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS,
                        new Intent[] { takePhotoIntent });

                startActivityForResult(chooserIntent,
                        SELECT_PICTURE);

你的onActivityResult会是这样的 -

protected void onActivityResult(int requestCode, int resultCode,
            Intent imageReturnedIntent) {
        super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
        if (imageReturnedIntent != null) {
            if (imageReturnedIntent.getData() != null) {
                Uri selectedImage = imageReturnedIntent.getData();



            }
        }
    }

希望这有帮助。

intent在图片上返回null

2 个答案: