嗨，我基本上是选择图像形式库或从相机捕捉并裁剪它。如果我裁剪从图库中选择的图像没有模糊，但如果我裁剪拍摄的图像意味着它变得模糊。
要启动相机，我已经使用了
private void cameraIntent()
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, REQUEST_CAMERA);
}
和相机onActivityResult
private void onCaptureImageResult(Intent data) {
Bitmap bm = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
crop(getImageUri(csActivity,bm));
}
这适用于裁剪图像
private void crop(Uri uri)
{
final Intent intent = new Intent("com.android.camera.action.CROP");
intent.setData(uri);
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 96);
intent.putExtra("outputY", 96);
intent.putExtra("noFaceDetection", true);
intent.putExtra("return-data", true);
startActivityForResult(intent, REQUEST_CROP);
}
在裁剪结果中我使用了
private void onCropImg(Intent data)
{
Bitmap bm = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 75, stream);
Uri tempUri = getImageUri(csActivity,bm);
// CALL THIS METHOD TO GET THE ACTUAL PATH
File destination = new File(getRealPathFromURI(tempUri));
csProfileImg.setImageBitmap(bm);
uploadProfileImg(destination);
}
和getImageUri
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
请帮帮我
答案 0 :(得分：0)
您可以使用库来裁剪图像，这样可以获得与图像质量一致的正确结果。使用：compile 'com.theartofdev.edmodo:android-image-cropper:2.3.+'
有关更多信息，请访问此页面：check my answer
答案 1 :(得分：0)
此答案将帮助其他人解决相机拍摄的照片的问题，该照片在裁剪时会产生模糊的图像。
通过在build.gradle中添加库：
implementation 'com.theartofdev.edmodo:android-image-cropper:2.3.+'
在Manifest上添加权限：
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
CameraActivity.java：
public class CameraActivity extends Activity {
private CropImageView mCropImageView;
private CircleImageView imVCature_pic;
private Uri mCropImageUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);
mCropImageView = (CropImageView) findViewById(R.id.CropImageView);
imVCature_pic = (CircleImageView) findViewById(R.id.imVCature_pic);
}
/**
* On load image button click, start pick image chooser activity.
*/
public void onLoadImageClick(View view) {
startActivityForResult(getPickImageChooserIntent(), 200);
}
/**
* Crop the image and set it back to the cropping view.
*/
public void onCropImageClick(View view) {
Bitmap cropped = mCropImageView.getCroppedImage(500, 500);
if (cropped != null)
imVCature_pic.setImageBitmap(cropped);
//mCropImageView.setImageBitmap(cropped);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
Uri imageUri = getPickImageResultUri(data);
// For API >= 23 we need to check specifically that we have permissions to read external storage,
// but we don't know if we need to for the URI so the simplest is to try open the stream and see if we get error.
boolean requirePermissions = false;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M &&
checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED &&
isUriRequiresPermissions(imageUri)) {
// request permissions and handle the result in onRequestPermissionsResult()
requirePermissions = true;
mCropImageUri = imageUri;
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 0);
}
if (!requirePermissions) {
mCropImageView.setImageUriAsync(imageUri);
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
if (mCropImageUri != null && grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
mCropImageView.setImageUriAsync(mCropImageUri);
} else {
Toast.makeText(CameraActivity.this, "Required permissions are not granted", Toast.LENGTH_LONG).show();
}
}
/**
* Create a chooser intent to select the source to get image from.<br/>
* The source can be camera's (ACTION_IMAGE_CAPTURE) or gallery's (ACTION_GET_CONTENT).<br/>
* All possible sources are added to the intent chooser.
*/
public Intent getPickImageChooserIntent() {
// Determine Uri of camera image to save.
Uri outputFileUri = getCaptureImageOutputUri();
List<Intent> allIntents = new ArrayList<>();
PackageManager packageManager = getPackageManager();
// collect all camera intents
Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
for (ResolveInfo res : listCam) {
Intent intent = new Intent(captureIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(res.activityInfo.packageName);
if (outputFileUri != null) {
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
}
allIntents.add(intent);
}
// collect all gallery intents
Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
List<ResolveInfo> listGallery = packageManager.queryIntentActivities(galleryIntent, 0);
for (ResolveInfo res : listGallery) {
Intent intent = new Intent(galleryIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(res.activityInfo.packageName);
allIntents.add(intent);
}
// the main intent is the last in the list (fucking android) so pickup the useless one
Intent mainIntent = allIntents.get(allIntents.size() - 1);
for (Intent intent : allIntents) {
if (intent.getComponent().getClassName().equals("com.android.documentsui.DocumentsActivity")) {
mainIntent = intent;
break;
}
}
allIntents.remove(mainIntent);
// Create a chooser from the main intent
Intent chooserIntent = Intent.createChooser(mainIntent, "Select source");
// Add all other intents
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, allIntents.toArray(new Parcelable[allIntents.size()]));
return chooserIntent;
}
/**
* Get URI to image received from capture by camera.
*/
private Uri getCaptureImageOutputUri() {
Uri outputFileUri = null;
File getImage = getExternalCacheDir();
if (getImage != null) {
outputFileUri = Uri.fromFile(new File(getImage.getPath(), "pickImageResult.jpeg"));
}
return outputFileUri;
}
/**
* Get the URI of the selected image from {@link #getPickImageChooserIntent()}.<br/>
* Will return the correct URI for camera and gallery image.
*
* @param data the returned data of the activity result
*/
public Uri getPickImageResultUri(Intent data) {
boolean isCamera = true;
if (data != null && data.getData() != null) {
String action = data.getAction();
isCamera = action != null && action.equals(MediaStore.ACTION_IMAGE_CAPTURE);
}
return isCamera ? getCaptureImageOutputUri() : data.getData();
}
/**
* Test if we can open the given Android URI to test if permission required error is thrown.<br>
*/
public boolean isUriRequiresPermissions(Uri uri) {
try {
ContentResolver resolver = getContentResolver();
InputStream stream = resolver.openInputStream(uri);
stream.close();
return false;
} catch (FileNotFoundException e) {
if (e.getCause() instanceof Exception) {
return true;
}
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
}
activity_camera.xml：
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="onLoadImageClick"
android:padding="@dimen/activity_horizontal_margin"
android:text="Load Image" />
<com.theartofdev.edmodo.cropper.CropImageView
android:id="@+id/CropImageView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="5"
android:scaleType="fitCenter" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="onCropImageClick"
android:padding="@dimen/activity_horizontal_margin"
android:text="Crop Image" />
</LinearLayout>