我有一个带有两个主按钮的应用程序。一个打开一个画廊,每个照片在设备上,另一个弹出相机。两者都工作正常,但事情就是这样:当我用相机按钮拍照时,它没有在画廊上显示!即使我关闭应用程序并再次打开它(强制库的代码再次运行)。我可以让图片显示的唯一方法是通过USB将设备连接到我的计算机,然后断开连接(我认为强制进行媒体搜索,更新等等。)
以下是相机意图的代码:
if (getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)){
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File photo = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), "IMG_" + timeStamp + ".jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photo));
imageUri = Uri.fromFile(photo);
startActivityForResult(intent, 1);
} else {
Toast.makeText(getApplicationContext(), "Seu dispositivo Android não possui uma câmera funcional.", Toast.LENGTH_LONG).show();
}
以下是图库的代码:
final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
final String orderBy = MediaStore.Images.Media._ID;
Cursor imagecursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,null, orderBy);
int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
this.count = imagecursor.getCount();
this.thumbnails = new Bitmap[this.count];
this.arrPath = new String[this.count];
this.thumbnailsselection = new boolean[this.count];
for (int i = 0; i < this.count; i++) {
imagecursor.moveToPosition(i);
int id = imagecursor.getInt(image_column_index);
thumbnails[i] = MediaStore.Images.Thumbnails.getThumbnail(
getApplicationContext().getContentResolver(), id,
MediaStore.Images.Thumbnails.MICRO_KIND, null);
arrPath[i]= imagecursor.getString(dataColumnIndex);
PS:我知道不推荐使用managedQuery,但这是我知道怎么做的唯一方法...... 谢谢!
答案 0 :(得分:0)
您可以尝试在编写文件后通知内容URI发生了更改:
getContentResolver().notifyChange(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null);
答案 1 :(得分:0)
保存文件后输入此代码,我解决了问题
// to tell system update data
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(file)));