I’m trying to show images in the specific folder using default Android Gallery. I found only one sample code to do this. I have simplified that code and now it’s much clear:
public class ScanActivity extends Activity implements MediaScannerConnectionClient {
private static final String SCAN_DIR = Environment.getExternalStorageDirectory() + File.separator + "MyFolder" + File.separator;
private static final String FILE_TYPE="image/*";
private String scanPath;
private MediaScannerConnection conn;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
scanPath = SCAN_DIR + new File(SCAN_DIR).list()[0];
conn = new MediaScannerConnection(getApplicationContext(), this);
conn.connect();
}
@Override
public void onMediaScannerConnected()
{
conn.scanFile(scanPath, FILE_TYPE);
}
@Override
public void onScanCompleted(String path, Uri uri)
{
try
{
if (uri != null)
{
//uri = content://media/external/images/media/11271
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, FILE_TYPE);
startActivity(intent);
}
}
finally
{
conn.disconnect();
conn = null;
}
}
}
On Android Froyo (2.2) it works OK – the gallery opens all images in MyFolder directory, but on Jelly Bean (4.1) I see just black screen (see the screenshot below). Of course scanned folder contains photos on both devices.
The logcat output:
11-03 18:31:31.872: W/DataManager(12540): exception in creating media object: /local/image/item/11271
11-03 18:31:31.872: W/DataManager(12540): java.lang.RuntimeException: cannot find data for: /local/image/item/11271
11-03 18:31:31.872: W/DataManager(12540): at com.android.gallery3d.data.LocalImage.<init>(LocalImage.java:104)
11-03 18:31:31.872: W/DataManager(12540): at com.android.gallery3d.data.LocalSource.createMediaObject(LocalSource.java:106)
11-03 18:31:31.872: W/DataManager(12540): at com.android.gallery3d.data.DataManager.getMediaObject(DataManager.java:165)
11-03 18:31:31.872: W/DataManager(12540): at com.android.gallery3d.data.LocalSource.getDefaultSetOf(LocalSource.java:183)
11-03 18:31:31.872: W/DataManager(12540): at com.android.gallery3d.data.DataManager.getDefaultSetOf(DataManager.java:261)
11-03 18:31:31.872: W/DataManager(12540): at com.android.gallery3d.app.Gallery.startViewAction(Gallery.java:198)
11-03 18:31:31.872: W/DataManager(12540): at com.android.gallery3d.app.Gallery.initializeByIntent(Gallery.java:91)
11-03 18:31:31.872: W/DataManager(12540): at com.android.gallery3d.app.Gallery.onCreate(Gallery.java:68)
11-03 18:31:31.872: W/DataManager(12540): at android.app.Activity.performCreate(Activity.java:5008)
11-03 18:31:31.872: W/DataManager(12540): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
11-03 18:31:31.872: W/DataManager(12540): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2140)
11-03 18:31:31.872: W/DataManager(12540): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2211)
11-03 18:31:31.872: W/DataManager(12540): at android.app.ActivityThread.access$600(ActivityThread.java:143)
11-03 18:31:31.872: W/DataManager(12540): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1209)
11-03 18:31:31.872: W/DataManager(12540): at android.os.Handler.dispatchMessage(Handler.java:99)
11-03 18:31:31.872: W/DataManager(12540): at android.os.Looper.loop(Looper.java:137)
11-03 18:31:31.872: W/DataManager(12540): at android.app.ActivityThread.main(ActivityThread.java:4965)
11-03 18:31:31.872: W/DataManager(12540): at java.lang.reflect.Method.invokeNative(Native Method)
11-03 18:31:31.872: W/DataManager(12540): at java.lang.reflect.Method.invoke(Method.java:511)
11-03 18:31:31.872: W/DataManager(12540): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
11-03 18:31:31.872: W/DataManager(12540): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
11-03 18:31:31.872: W/DataManager(12540): at dalvik.system.NativeStart.main(Native Method)
11-03 18:31:31.872: V/StateManager(12540): startState class com.android.gallery3d.app.PhotoPage
11-03 18:31:31.911: V/NFC(12540): this device does not have NFC support
11-03 18:31:32.044: W/DecodeService(12540): java.lang.NullPointerException
11-03 18:31:32.044: W/DecodeService(12540): at java.io.File.fixSlashes(File.java:185)
11-03 18:31:32.044: W/DecodeService(12540): at java.io.File.<init>(File.java:134)
11-03 18:31:32.044: W/DecodeService(12540): at java.io.FileInputStream.<init>(FileInputStream.java:105)
11-03 18:31:32.044: W/DecodeService(12540): at com.android.gallery3d.data.DecodeUtils.decodeThumbnail(DecodeUtils.java:92)
11-03 18:31:32.044: W/DecodeService(12540): at com.android.gallery3d.data.LocalImage$LocalImageRequest.onDecodeOriginal(LocalImage.java:188)
11-03 18:31:32.044: W/DecodeService(12540): at com.android.gallery3d.data.ImageCacheRequest.run(ImageCacheRequest.java:74)
11-03 18:31:32.044: W/DecodeService(12540): at com.android.gallery3d.data.LocalImage$LocalImageRequest.run(LocalImage.java:154)
11-03 18:31:32.044: W/DecodeService(12540): at com.android.gallery3d.data.ImageCacheRequest.run(ImageCacheRequest.java:28)
11-03 18:31:32.044: W/DecodeService(12540): at com.android.gallery3d.util.ThreadPool$Worker.run(ThreadPool.java:124)
11-03 18:31:32.044: W/DecodeService(12540): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
11-03 18:31:32.044: W/DecodeService(12540): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
11-03 18:31:32.044: W/DecodeService(12540): at java.lang.Thread.run(Thread.java:856)
11-03 18:31:32.044: W/DecodeService(12540): at com.android.gallery3d.util.PriorityThreadFactory$1.run(PriorityThreadFactory.java:43)
11-03 18:31:32.044: W/ImageCacheRequest(12540): decode orig failed /local/image/item/11271,THUMB
I googled and found no information about this exception.
I’m really confused about this problem and don’t know how to fix it. Does anyone have idea how to fix it? Thanks.
It seems that I found problem. Changing line
to this line:
fixed a problem. I’m not sure but this seems to be an Android bug.