[英]Take photo w/ camera intent and display in imageView or textView?
I have a question about how to take an image using the camera intent (or camera API) and then bring the image into an imageView for me to display in my application. 我有一个关于如何使用相机意图(或相机API)拍摄图像的问题,然后将图像带入imageView,以便在我的应用程序中显示。 This is what I have so far. 这就是我到目前为止所拥有的。
I setup a button 我设置了一个按钮
Button btnPicture = (Button) findViewById(R.id.btn_picture);
btnPicture.setOnClickListener(this);
I setup a Camera method 我设置了一个Camera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);
}
And this is where I am lost. 这就是我迷失的地方。 I am trying to process the image that I took. 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);
}
My intent is to display the image that you took inside image_view. 我的目的是显示你在image_view中拍摄的图像。 I am not receiving an error, nothing happens. 我没有收到错误,没有任何反应。 When I take the picture, I am asked to either take another picture or after I use the device back button the application force closes. 当我拍照时,我被要求拍摄另一张照片,或者在我使用设备后退按钮后,应用程序强制关闭。 It seems that I am taken out of my application completely, and returning is a big issue. 似乎我完全退出了我的应用程序,返回是一个大问题。 Any suggestions? 有什么建议? What am I missing? 我错过了什么?
O yea, and here is my onActivityResult 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();
}
}
}
I am trying to put the image in getExtras, and then store it to a ByteArray. 我试图将图像放在getExtras中,然后将其存储到ByteArray。 Was another thing I was trying to do. 是我想要做的另一件事。 Not sure how it all comes together. 不知道这一切是如何结合在一起的。
The method which i found to be easy and helpful is this: 我觉得简单有用的方法是这样的:
MainActivity 主要活动
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);
}
and then in your activity onActivityResult method: 然后在你的活动onActivityResult方法:
@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 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;
}
}
and then on the ImageView onclick method will be like this: 然后在ImageView onclick方法将是这样的:
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);
}
}
To take photo correctly you should store it in temp file, because data in result intent can be null: 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null:
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);
And then get photo from Uri: 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);
}
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