我正在开发一个要求拍照的应用程序。拍摄照片后,将创建一个文件,并使用文件路径将照片放置在ImageView
中。
一切似乎都很好,相机活动开始了,我可以拍照了,但是当我们返回通话活动时,ImageView
一直空白。
有什么建议么?
请在下面查看我的代码
public void takePhotoButtonOnClick(View view) {
dispatchTakePictureIntent();
Bitmap bmImg = BitmapFactory.decodeFile(mCurrentPhotoPath);
photoImage.setImageBitmap(bmImg);
}
static final int REQUEST_TAKE_PHOTO = 1;
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
}
// Continue only if the File was successfully created
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(this,
"hwardak.employeecenter.FileProvider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
String mCurrentPhotoPath;
private File createImageFile() throws IOException {
// Create an image file name
String imageFileName = editText_id.getText().toString().trim() + "_photo_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
XML
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/photoImage"
android:layout_gravity="center_horizontal"
android:src="@mipmap/empty_profile"
/>
答案 0 :(得分:0)
您需要实现方法onActivityResult
,然后在那里更新ImageView
。
另请参阅https://developer.android.com/training/basics/intents/result ...例如:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if (resultCode == RESULT_OK && requestCode == REQUEST_TAKE_PHOTO) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
mImageView.setImageBitmap(imageBitmap);
}
}
也许下次阅读整个页面,而不仅仅是一半... https://developer.android.com/training/camera/photobasics