[英]how to load a picture captured from camera in another activity on image view?
[英]How to pass a captured image from custom camera to another activity?
我目前正在嘗試構建一個自定義相機應用程序,該應用程序將捕獲圖像,然后將其顯示在另一個活動中(通過更新 ImageView)。
目前,我可以通過我的相機預覽在設備上成功捕獲和保存圖像,甚至可以使用捕獲的圖像成功更新該活動中的 ImageView - 但是,我在將捕獲的圖像傳遞給第二個活動。
我在網上看到很多結合使用 ActivityResult 和 Intent 的解決方案,但它們似乎都使用設備的本機相機應用程序,而不是像我這樣使用自定義相機。
我的 CameraActivity 類如下所示:
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_activity);
swatch = (ImageView) findViewById(R.id.swatch);
preview = (FrameLayout) findViewById(R.id.camera_preview);
cameraButton = (Button) findViewById(R.id.captureButton);
cameraButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mCamera.takePicture(null, null, mPicture);
}
});
}
private Camera.PictureCallback mPicture = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
if (pictureFile == null) {
Log.d("Camera error",
"Error creating media file, check storage permissions: ");
return;
}
Log.i("Picture", pictureFile.toString());
try {
final ImageView imageView = (ImageView) findViewById(R.id.imageView);
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
BitmapFactory.Options scalingOptions = new BitmapFactory.Options();
scalingOptions.inSampleSize = camera.getParameters().getPictureSize().width / imageView.getMeasuredWidth();
final Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length, scalingOptions);
} catch (FileNotFoundException e) {
Log.d("Camera error", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("Camera error", "Error accessing file: " + e.getMessage());
}
finish();
openColourDetectorActivity();
}
};
private static File getOutputMediaFile(int type) {
File mediaStorageDir = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM),
"Medici");
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.i("Medici", "failed to create directory");
return null;
}
}
@SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyymmddhhmmss")
.format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ "IMG_" + timeStamp + ".jpg");
} else {
return null;
}
return mediaFile;
}
public void openColourDetectorActivity() {
Intent intent = new Intent(this, ColourDetectorActivity.class);
startActivity(intent);
}
當然,我試圖在該活動的 onCreate 方法的另一端接收它。
知道我該怎么做嗎?
openColourDetectorActivity(pictureFile);
public void openColourDetectorActivity(File file) {
Intent intent = new Intent(this, ColourDetectorActivity.class);
intent.putExtra("FILE", file.getPath());
startActivity(intent);
}
在 ColorDetectorActivity 中:
new File(getIntent().getStringExtra("FILE"))
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