用/相机意图拍照并在imageView和textView中显示？
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【中文标题】用/相机意图拍照并在imageView和textView中显示？【英文标题】：Take photo w/ camera intent and display in imageView or textView? 【发布时间】：2013-11-08 01:28:09 【问题描述】：我有一个关于如何使用相机意图（或相机 API）拍摄图像，然后将图像放入 imageView 以在我的应用程序中显示的问题。这是我目前所拥有的。
我设置了一个按钮
Button btnPicture = (Button) findViewById(R.id.btn_picture);
btnPicture.setOnClickListener(this);
我设置了一个相机方法
private void Camera()
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, TAKE_PICTURE_CODE);
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, REQUEST_CODE);
这就是我迷路的地方。我正在尝试处理我拍摄的图像。
private void processImage(Intent intent)
setContentView(R.layout.imagelayout);
ImageView imageView = (ImageView)findViewById(R.id.image_view);
cameraBitmap = (Bitmap)intent.getExtras().get("data");
imageView.setImageBitmap(cameraBitmap);
我的目的是显示您在 image_view 中拍摄的图像。我没有收到错误，没有任何反应。当我拍照时，系统会要求我再拍一张照片，或者在我使用设备后退按钮后，应用程序会关闭。看来我完全退出了我的申请，返回是一个大问题。有什么建议？我错过了什么？
是的，这是我的 onActivityResult
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if(TAKE_PICTURE_CODE == requestCode)
Bundle extras = data.getExtras();
if (extras.containsKey("data"))
Bitmap bmp = (Bitmap) extras.get("data");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, baos);
byte[] image = baos.toByteArray();
if (image != null)
Log.d(TAG, "image != null");
else
Toast.makeText(getBaseContext(), "Fail to capture image", Toast.LENGTH_LONG).show();
我正在尝试将图像放入 getExtras，然后将其存储到 ByteArray。这是我想做的另一件事。不知道这一切是如何结合在一起的。
【问题讨论】：
发布onActivityResult()..的代码。
这是一个很好的项目，可以处理大部分复杂性：github.com/CameraKit/camerakit-android。不需要onActivityResult(..)，简洁的onRequestPermissionsResult(..)实现。在这个问题的 [100 多行] 答案的海洋中，非常感谢：***.com/a/43707269/2162226
【参考方案1】：
我发现简单有用的方法是这样的：
MainActivity
private static String root = null;
private static String imageFolderPath = null;
private String imageName = null;
private static Uri fileUri = null;
private static final int CAMERA_IMAGE_REQUEST=1;
public void captureImage(View view)
ImageView imageView = (ImageView) findViewById(R.id.capturedImageview);
// fetching the root directory
root = Environment.getExternalStorageDirectory().toString()
+ "/Your_Folder";
// Creating folders for Image
imageFolderPath = root + "/saved_images";
File imagesFolder = new File(imageFolderPath);
imagesFolder.mkdirs();
// Generating file name
imageName = "test.png";
// Creating image here
File image = new File(imageFolderPath, imageName);
fileUri = Uri.fromFile(image);
imageView.setTag(imageFolderPath + File.separator + imageName);
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
startActivityForResult(takePictureIntent,
CAMERA_IMAGE_REQUEST);
然后在你的活动onActivityResult方法中：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
switch (requestCode)
case CAMERA_IMAGE_REQUEST:
Bitmap bitmap = null;
try
GetImageThumbnail getImageThumbnail = new GetImageThumbnail();
bitmap = getImageThumbnail.getThumbnail(fileUri, this);
catch (FileNotFoundException e1)
// TODO Auto-generated catch block
e1.printStackTrace();
catch (IOException e1)
// TODO Auto-generated catch block
e1.printStackTrace();
// Setting image image icon on the imageview
ImageView imageView = (ImageView) this
.findViewById(R.id.capturedImageview);
imageView.setImageBitmap(bitmap);
break;
default:
Toast.makeText(this, "Something went wrong...",
Toast.LENGTH_SHORT).show();
break;
GetImageThumbnail.java
public class GetImageThumbnail
private static int getPowerOfTwoForSampleRatio(double ratio)
int k = Integer.highestOneBit((int) Math.floor(ratio));
if (k == 0)
return 1;
else
return k;
public Bitmap getThumbnail(Uri uri, Context context)
throws FileNotFoundException, IOException
InputStream input = context.getContentResolver().openInputStream(uri);
BitmapFactory.Options onlyBoundsOptions = new BitmapFactory.Options();
onlyBoundsOptions.inJustDecodeBounds = true;
onlyBoundsOptions.inDither = true;// optional
onlyBoundsOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;// optional
BitmapFactory.decodeStream(input, null, onlyBoundsOptions);
input.close();
if ((onlyBoundsOptions.outWidth == -1)
|| (onlyBoundsOptions.outHeight == -1))
return null;
int originalSize = (onlyBoundsOptions.outHeight > onlyBoundsOptions.outWidth) ? onlyBoundsOptions.outHeight
: onlyBoundsOptions.outWidth;
double ratio = (originalSize > 400) ? (originalSize / 350) : 1.0;
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmapOptions.inSampleSize = getPowerOfTwoForSampleRatio(ratio);
bitmapOptions.inDither = true;// optional
bitmapOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;// optional
input = context.getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(input, null, bitmapOptions);
input.close();
return bitmap;
然后在ImageView的onclick方法上会是这样的：
public void showFullImage(View view)
String path = (String) view.getTag();
if (path != null)
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri imgUri = Uri.parse("file://" + path);
intent.setDataAndType(imgUri, "image/*");
startActivity(intent);
【讨论】：
谢谢，你的例子很广泛，但很有帮助。我面临强制关闭。当我摆脱似乎可以解决问题的 onlyBoundsOptions.inJustDecodeBounds 行但事情仍然没有按照我想要的方式工作时。我会继续插手的。但是你帮助我进步了，谢谢！ 这行得通。考虑将 getThumbnail() 设为静态，您不需要其类的实例即可使用它。【参考方案2】：要正确拍照，您应该将其存储在临时文件中，因为结果意图中的数据可以为空：
final Intent pickIntent = new Intent();
pickIntent.setType("image/*");
pickIntent.setAction(Intent.ACTION_GET_CONTENT);
final String pickTitle = activity.getString(R.string.choose_image);
final Intent chooserIntent = Intent.createChooser(pickIntent, pickTitle);
if (AvailabilityUtils.isExternalStorageReady())
final Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
final Uri fileUri = getCameraTempFileUri(activity, true);
takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS,
new Intent[] takePhotoIntent );
activity.startActivityForResult(chooserIntent, REQUEST_CODE);
然后从 Uri 获取照片：
if (requestCode == ProfileDataView.REQUEST_CODE
&& resultCode == Activity.RESULT_OK)
final Uri dataUri = data == null ? getCameraTempFileUri(context,
false) : data.getData();
final ParcelFileDescriptor pfd = context.getContentResolver()
.openFileDescriptor(imageUri, "r");
final FileDescriptor fd = pfd.getFileDescriptor();
final Bitmap bitmap = BitmapFactory.decodeFileDescriptor(fd);
【讨论】：
10x，但您也应该发布getCameraTempFileUri()。以上是关于用/相机意图拍照并在imageView和textView中显示？的主要内容，如果未能解决你的问题，请参考以下文章