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我用的是线下获得缩略图:重命名照片的文件名,但是缩略图是错误的
bitmap = MediaStore.Images.Thumbnails.getThumbnail(act.getApplicationContext().getContentResolver(), fid, MediaStore.Images.Thumbnails.MICRO_KIND, null);
我尝试用下面的代码来重命名文件名:
File rename = new File(oldname);
String newpath = newname;
rename.renameTo(new File(newname));
及以下使用代码更新数据库:
IntentFilter intentfilter = new IntentFilter(Intent.ACTION_MEDIA_SCANNER_STARTED);
intentfilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);
intentfilter.addDataScheme("file");
MediaScannerReceiver scanSdReceiver = new MediaScannerReceiver();
registerReceiver(scanSdReceiver, intentfilter);
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + Environment.getExternalStorageDirectory().getAbsolutePath())));
public class MediaScannerReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(action.equals("android.intent.action.MEDIA_SCANNER_FINISHED")) {
bitmap = MediaStore.Images.Thumbnails.getThumbnail(act.getApplicationContext().getContentResolver(), fid, MediaStore.Images.Thumbnails.MICRO_KIND, null);
}
}
}
文件更名成功,文件ID也得到了新的。 但缩略图显示是错误的。 如何获得正确的缩略图?