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[英]How to resize image that captured from camera and display on imageview
[英]Android display captured image from Camera in CircleImageView
我在論壇中搜索了類似的問題,但我沒有找到我的代碼的正確答案。 我有一個活動,用戶可以選擇(從對話框中)是從畫廊上傳照片還是用相機拍攝。 我想在 CircularImageView 中顯示用戶選擇的照片。 我能夠為從畫廊中挑選的圖像做到這一點,但不幸的是,如果我用相機拍攝它就不起作用。 這是CircularImageView的布局代碼:
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/photo"
android:layout_width="160dp"
android:layout_height="160dp"
android:layout_marginTop="20dp"
android:layout_gravity="center"
android:layout_centerInParent="true"
android:src="@mipmap/add_profile_photo_round"
app:civ_border_width="0dp"
app:civ_border_color="#000000" />
這是 Java 代碼:
TextView take_photo = (TextView) dialog.findViewById(R.id.take_photo);
...
take_photo.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
public void onClick(View v) {
takePhotoFromCamera();
dialog.dismiss();
}
});
pick_gallery.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
choosePhotoFromGallary();
dialog.dismiss();
}
});
}
public void choosePhotoFromGallary() {
Intent galleryIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, GALLERY);
}
@RequiresApi(api = Build.VERSION_CODES.M)
private void takePhotoFromCamera() {
if (checkSelfPermission(Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.CAMERA},
MY_CAMERA_REQUEST_CODE);
}
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == this.RESULT_CANCELED) {
return;
}
if (requestCode == GALLERY) {
if (data != null) {
Uri contentURI = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), contentURI);
image.setImageBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
} else if (requestCode == MY_CAMERA_REQUEST_CODE) {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
final Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(),
options);
image.setImageBitmap(bitmap);
} catch (NullPointerException e) {
e.printStackTrace();
}
}
}
正如我已經說過的,它適用於畫廊中的圖像,但不適用於捕獲的圖像。 謝謝你的幫助 PS如果我的英語不好,對不起
編輯:我試圖修改代碼,但它仍然不起作用
else if (requestCode == MY_CAMERA_REQUEST_CODE) {
try {
ParcelFileDescriptor parcelFileDescriptor = getContentResolver().openFileDescriptor(fileUri, "r");
assert parcelFileDescriptor != null;
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap bitmap = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
image.setImageBitmap(bitmap);
} catch (NullPointerException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
第二次編輯:我已經使用了這段代碼,但它仍然不起作用:
ParcelFileDescriptor parcelFileDescriptor = getContentResolver().openFileDescriptor(Objects.requireNonNull(data.getData()), "r");
assert parcelFileDescriptor != null;
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap bitmap = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
image.setImageBitmap(bitmap);
} catch (NullPointerException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
不應使用fileUri.getPath()
,您不知道Uri
是否指向文件。 將您的 bitmap 更改為以下
ParcelFileDescriptor parcelFileDescriptor = getContentResolver().openFileDescriptor(data.getData(), "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
image.setImageBitmap(bitmap);
編輯:
我認為從長遠來看,最好的解決方案是使用圖像緩存庫。 原因是,您可能會遇到OutOfMemoryException
,而且它會為您處理所有事情。 我會推薦畢加索。
首先實現它,通過將以下內容添加到您的應用程序級build.gradle
:
implementation 'com.squareup.picasso:picasso:2.71828'
然后將您的onActivityResult
更改為以下內容:
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == this.RESULT_CANCELED) {
return;
}
if (requestCode == GALLERY || requestCode == MY_CAMERA_REQUEST_CODE) {
Picasso.get().load(data.getData()).fit().centerCrop()
.placeholder(R.drawable.user_placeholder) // You can add a placeholder while the image loads
.error(R.drawable.user_placeholder_error) // You can add an image for when there's an error loading image from Gallery
.into(image);
}
}
如果它對其他人有用,我發現了這段代碼並且它有效:
Bitmap bmp = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
// convert byte array to Bitmap
Bitmap bitmap = BitmapFactory.decodeByteArray(byteArray, 0,
byteArray.length);
encodedString = Base64.encodeToString(byteArray, 0);
image.setImageBitmap(bitmap);
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