当我打开我的画廊以便在节目中选择我的照片时。我得到以下错误。它返回null。 这是我的幻灯片扩展ListActivity:
public static Bitmap getThumbnail(Uri uri, ContentResolver cr,
BitmapFactory.Options options)
{
int id = Integer.parseInt(uri.getLastPathSegment());
Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(cr, id,
MediaStore.Images.Thumbnails.MICRO_KIND, options);
return bitmap;
}
在另一个SlideshowEditor中扩展了ListActivity:
private class LoadThumbnailTask extends AsyncTask<Object,Object,Bitmap>
{
ImageView imageView; // displays the thumbnail
// load thumbnail: ImageView, MediaType and Uri as args
@Override
protected Bitmap doInBackground(Object... params)
{
imageView = (ImageView) params[0];
return Slideshow.getThumbnail((Uri) params[1],
getContentResolver(), new BitmapFactory.Options());
} // end method doInBackground
// set thumbnail on ListView
@Override
protected void onPostExecute(Bitmap result)
{
super.onPostExecute(result);
imageView.setImageBitmap(result);
} // end method onPostExecute
}
和
protected Bitmap doInBackground(Object... params)
{
imageView = (ImageView) params[0];
return Slideshow.getThumbnail((Uri) params[1],
getContentResolver(), new BitmapFactory.Options());
}
我的logcat:
执行doInBackground()时发生错误 在android.os.AsyncTask $ 3.done(AsyncTask.java:300) 在java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355) at java.util.concurrent.FutureTask.setException(FutureTask.java:222) 在java.util.concurrent.FutureTask.run(FutureTask.java:242) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:841)引起:java.lang.NumberFormatException:无效的int:“image:54305” 在java.lang.Integer.invalidInt(Integer.java:137) 在java.lang.Integer.parse(Integer.java:374) 在java.lang.Integer.parseInt(Integer.java:365) 在java.lang.Integer.parseInt(Integer.java:331) 在com.harshadjadav.slideshow.Slideshow.getThumbnail(Slideshow.java:328) 在com.harshadjadav.slideshow.SlideshowEditor $ LoadThumbnailTask.doInBackground(SlideshowEditor.java:225) 在com.harshadjadav.slideshow.SlideshowEditor $ LoadThumbnailTask.doInBackground(SlideshowEditor.java:215) 在android.os.AsyncTask $ 2.call(AsyncTask.java:288) 在java.util.concurrent.FutureTask.run(FutureTask.java:237) 在
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
答案 0 :(得分:0)
在getThumbnail()
方法中,Uri.getLastPathSegment()
将返回String
,因此您收到此错误,您正在尝试将String
对象解析为{{1} }
您可以将方法更新为
int
可以像
一样打电话public static Bitmap getThumbnail(ContentResolver cr, String path) throws Exception { Cursor ca = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[] { MediaStore.MediaColumns._ID }, MediaStore.MediaColumns.DATA + "=?", new String[] {path}, null); if (ca != null && ca.moveToFirst()) { int id = ca.getInt(ca.getColumnIndex(MediaStore.MediaColumns._ID)); ca.close(); return MediaStore.Images.Thumbnails.getThumbnail(cr, id, MediaStore.Images.Thumbnails.MICRO_KIND, null ); } ca.close(); return null; }