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Google PhotoIntentActivityサンプルを使用して、アプリにネイティブAndroidカメラを実装しています。 このサンプルでは、メインアクティビティ（PhotoIntentActivity）からボタンをクリックすると、カメラが起動し、写真を撮ると、写真は常に同じアクティビティに配置されたImageViewで視覚化されます。 そこにとどまるのではなく、私は新しい活動の中で意図を開始して写真を視覚化したいと思います。Androidカメラで写真を撮った後に新しいアクティビティを開始します
私は、主なアクティビティで写真がどこに渡されたか、どこで/どのように新しいインテントを立ち上げるべきか理解できません。これはコードです：
public class PhotoIntentActivity extends Activity {
private static final int ACTION_TAKE_PHOTO = 1;
private static final String BITMAP_STORAGE_KEY = "viewbitmap";
private static final String IMAGEVIEW_VISIBILITY_STORAGE_KEY = "imageviewvisibility";
private ImageView mImageView;
private Bitmap mImageBitmap;
private static final String VIDEO_STORAGE_KEY = "viewvideo";
private static final String VIDEOVIEW_VISIBILITY_STORAGE_KEY = "videoviewvisibility";
private VideoView mVideoView;
private Uri mVideoUri;
private String mCurrentPhotoPath;
private static final String JPEG_FILE_PREFIX = "IMG_";
private static final String JPEG_FILE_SUFFIX = ".jpg";
private AlbumStorageDirFactory mAlbumStorageDirFactory = null;
/* Photo album for this application */
private String getAlbumName() {
return getString(R.string.album_name);
}
private File getAlbumDir() {
File storageDir = null;
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
storageDir = mAlbumStorageDirFactory.getAlbumStorageDir(getAlbumName());
if (storageDir != null) {
if (! storageDir.mkdirs()) {
if (! storageDir.exists()){
Log.d("CameraSample", "failed to create directory");
return null;
}
}
}
} else {
Log.v(getString(R.string.app_name), "External storage is not mounted READ/WRITE.");
}
return storageDir;
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = JPEG_FILE_PREFIX + timeStamp + "_";
File albumF = getAlbumDir();
File imageF = File.createTempFile(imageFileName, JPEG_FILE_SUFFIX, albumF);
return imageF;
}
private File setUpPhotoFile() throws IOException {
File f = createImageFile();
mCurrentPhotoPath = f.getAbsolutePath();
return f;
}
private void setPic() {
/* There isn't enough memory to open up more than a couple camera photos */
/* So pre-scale the target bitmap into which the file is decoded */
/* Get the size of the ImageView */
int targetW = mImageView.getWidth();
int targetH = mImageView.getHeight();
/* Get the size of the image */
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
int photoW = bmOptions.outWidth;
int photoH = bmOptions.outHeight;
/* Figure out which way needs to be reduced less */
int scaleFactor = 1;
if ((targetW > 0) || (targetH > 0)) {
scaleFactor = Math.min(photoW/targetW, photoH/targetH);
}
/* Set bitmap options to scale the image decode target */
bmOptions.inJustDecodeBounds = false;
bmOptions.inSampleSize = scaleFactor;
bmOptions.inPurgeable = true;
/* Decode the JPEG file into a Bitmap */
Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
/* Associate the Bitmap to the ImageView */
mImageView.setImageBitmap(bitmap);
mVideoUri = null;
mImageView.setVisibility(View.VISIBLE);
mVideoView.setVisibility(View.INVISIBLE);
}
private void galleryAddPic() {
Intent mediaScanIntent = new Intent("android.intent.action.MEDIA_SCANNER_SCAN_FILE");
File f = new File(mCurrentPhotoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
private void dispatchTakePictureIntent(int actionCode) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
switch(actionCode) {
case ACTION_TAKE_PHOTO:
File f = null;
try {
f = setUpPhotoFile();
mCurrentPhotoPath = f.getAbsolutePath();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
} catch (IOException e) {
e.printStackTrace();
f = null;
mCurrentPhotoPath = null;
}
break;
default:
break;
} // switch
startActivityForResult(takePictureIntent, actionCode);
}
private void handleBigCameraPhoto() {
if (mCurrentPhotoPath != null) {
setPic();
galleryAddPic();
mCurrentPhotoPath = null;
}
}
private void handleCameraVideo(Intent intent) {
mVideoUri = intent.getData();
mVideoView.setVideoURI(mVideoUri);
mImageBitmap = null;
mVideoView.setVisibility(View.VISIBLE);
mImageView.setVisibility(View.INVISIBLE);
}
Button.OnClickListener mTakePicOnClickListener =
new Button.OnClickListener() {
@Override
public void onClick(View v) {
dispatchTakePictureIntent(ACTION_TAKE_PHOTO);
}
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mImageView = (ImageView) findViewById(R.id.imageView1);
mVideoView = (VideoView) findViewById(R.id.videoView1);
mImageBitmap = null;
mVideoUri = null;
Button picBtn = (Button) findViewById(R.id.btnIntend);
setBtnListenerOrDisable(
picBtn,
mTakePicOnClickListener,
MediaStore.ACTION_IMAGE_CAPTURE
);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) {
mAlbumStorageDirFactory = new FroyoAlbumDirFactory();
} else {
mAlbumStorageDirFactory = new BaseAlbumDirFactory();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case ACTION_TAKE_PHOTO: {
if (resultCode == RESULT_OK) {
handleBigCameraPhoto();
}
break;
} // ACTION_TAKE_PHOTO
} // switch
}
// Some lifecycle callbacks so that the image can survive orientation change
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putParcelable(BITMAP_STORAGE_KEY, mImageBitmap);
outState.putParcelable(VIDEO_STORAGE_KEY, mVideoUri);
outState.putBoolean(IMAGEVIEW_VISIBILITY_STORAGE_KEY, (mImageBitmap != null));
outState.putBoolean(VIDEOVIEW_VISIBILITY_STORAGE_KEY, (mVideoUri != null));
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
mImageBitmap = savedInstanceState.getParcelable(BITMAP_STORAGE_KEY);
mVideoUri = savedInstanceState.getParcelable(VIDEO_STORAGE_KEY);
mImageView.setImageBitmap(mImageBitmap);
mImageView.setVisibility(
savedInstanceState.getBoolean(IMAGEVIEW_VISIBILITY_STORAGE_KEY) ?
ImageView.VISIBLE : ImageView.INVISIBLE
);
mVideoView.setVideoURI(mVideoUri);
mVideoView.setVisibility(
savedInstanceState.getBoolean(VIDEOVIEW_VISIBILITY_STORAGE_KEY) ?
ImageView.VISIBLE : ImageView.INVISIBLE
);
}
/**
* Indicates whether the specified action can be used as an intent. This
* method queries the package manager for installed packages that can
* respond to an intent with the specified action. If no suitable package is
* found, this method returns false.
* http://android-developers.blogspot.com/2009/01/can-i-use-this-intent.html
*
* @param context The application's environment.
* @param action The Intent action to check for availability.
*
* @return True if an Intent with the specified action can be sent and
* responded to, false otherwise.
*/
public static boolean isIntentAvailable(Context context, String action) {
final PackageManager packageManager = context.getPackageManager();
final Intent intent = new Intent(action);
List<ResolveInfo> list =
packageManager.queryIntentActivities(intent,
PackageManager.MATCH_DEFAULT_ONLY);
return list.size() > 0;
}
private void setBtnListenerOrDisable(
Button btn,
Button.OnClickListener onClickListener,
String intentName
) {
if (isIntentAvailable(this, intentName)) {
btn.setOnClickListener(onClickListener);
} else {
btn.setText(
getText(R.string.cannot).toString() + " " + btn.getText());
btn.setClickable(false);
}
}
}
誰でもお手伝いできますか？ ありがとう
[：あなたは新しい
Activityでこのパスを取得することができます次にサンプル]（https://github.com/commonsguy/cw-omnibus/tree/master/Camera/FileProvider）をシナリオの対象としています。 – CommonsWare
非常に興味深い。ありがとう！ – andraga91