当用户在我的应用程序中使用相机拍摄照片时，我想为我的应用程序生成专用相册。此相册将用于保存从我的应用程序中的相机意图捕获的所有图像。它就像Messenger和Whatsapp应用程序一样工作。有谁知道怎么做？
public class ImageQueryActivity extends AppCompatActivity {
private LinearLayout mImageQueryLayout;
private ImageView mAddPhotoButton;
private String mCurrentPhotoPath;
final int REQUEST_IMAGE_CAPTURE = 1;
static final int REQUEST_GALLERY = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_query);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dispatchTakePictureIntent();
}
});
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mImageQueryLayout = (LinearLayout) findViewById(R.id.image_query_layout);
mAddPhotoButton = (ImageView) findViewById(R.id.add_photo_image_view);
mAddPhotoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dispatchTakePictureIntent();
}
});
}
// dp to pixel converter
public static int convDpToPx(Context context, float dp) {
DisplayMetrics metrics = context.getResources().getDisplayMetrics();
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, metrics);
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
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;
}
private void dispatchTakePictureIntent() {
AlertDialog.Builder builder = new AlertDialog.Builder(ImageQueryActivity.this);
builder.setPositiveButton("Camera", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
Toast.makeText(getApplicationContext(),
"Problem occurred while saving photo",
Toast.LENGTH_LONG).show();
}
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(getApplicationContext(),
"com.kelvin.foodizzy.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
galleryAddPic(mCurrentPhotoPath);
}
}
}
});
builder.setNegativeButton("Gallery", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent();
intent.setType("image/*").setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select File"), REQUEST_GALLERY);
}
});
builder.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == REQUEST_IMAGE_CAPTURE) {
ImageView imageView = new ImageView(this);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams
(LinearLayout.LayoutParams.MATCH_PARENT,
convDpToPx(getApplicationContext(), 180));
layoutParams.setMargins(layoutParams.leftMargin, layoutParams.topMargin,
layoutParams.rightMargin, convDpToPx(getApplicationContext(), 20));
imageView.setLayoutParams(layoutParams);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setImageBitmap(BitmapFactory.decodeFile(mCurrentPhotoPath));
galleryAddPic(mCurrentPhotoPath);
mImageQueryLayout.addView(imageView);
}
}
}
private void galleryAddPic(String file) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(file);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
sendBroadcast(mediaScanIntent);
}
}
答案 0 :(得分：0)
最后，我设法解决了我的问题。这项工作在24以上的API
//set file storage to getExternalStoragePublicDirectory
private File createImageFile() throws IOException {
@SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "Foodizzy");
if (!storageDir.exists()) {
if (!storageDir.mkdirs()) {
Log.d("Camera", "failed to create directory");
return null;
}
}
File image = File.createTempFile(
imageFileName,
".jpg",
storageDir
);
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
//Inside camera intent, use file provider to get photo uri
Intent takePictureIntent = new Intent();
takePictureIntent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
ex.printStackTrace();
}
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(getApplicationContext(),
BuildConfig.APPLICATION_ID + ".fileprovider", photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
//to store the image inside photo Gallery / (in my Nexus phone is Photos), create the following method
private void galleryAddPic() {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(mCurrentPhotoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
//and call the method inside onActivityResult
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == REQUEST_IMAGE_CAPTURE) {
//code to get bitmap or whatever
galleryAddPic();
}
}
}
//Inside AndroidManifest.xml, add provider inside application
<application
...
...>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
</application>
//create a file named "file_paths.xml" under xml and add the following code
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path name="external_files" path="."/>
</paths>