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POHow to read image files from the gallery of the phone
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  1. POHow to read image files from the gallery of the phone
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    copied!<p>I have a problem with this code, in practice i'm trying to read from the gallery of the phone only the file name image2.jpg image3.jpg ... etc. but this code gives me error </p> <p>this is the Code:</p> <pre><code> public static Uri getRandomImage(ContentResolver resolver) { String secondo = "image2.jpg"; String terzo = "image3.jpg"; String quarto = "image4.jpg"; String quinto = "image5.jpg"; String sesto = "image6.jpg"; String settimo = "image7.jpg"; String ottavo = "image8.jpg"; String[] projection = new String[] { BaseColumns._ID, MediaColumns.DATA, }; Uri uri = Media.EXTERNAL_CONTENT_URI; Cursor cursor = Media.query(resolver, uri, projection, null, MediaColumns._ID); if (cursor == null || cursor.getCount() &lt;= 0) { return null; } cursor.moveToPosition(new Random().nextInt(cursor.getCount())); String completefilepath = cursor.getString(cursor.getColumnIndex(MediaColumns.DATA)); if(completefilepath == secondo || completefilepath == terzo || completefilepath == quarto || completefilepath == quinto || completefilepath == sesto || completefilepath == settimo || completefilepath == ottavo){ string = cursor.getString(1); } return Uri.withAppendedPath(uri, string); } </code></pre> <p>this is the LOGCAT:</p> <pre><code>E/AndroidRuntime(9147): FATAL EXCEPTION: main E/AndroidRuntime(9147): java.lang.IllegalStateException: Unknown URL: content://media/external/images/media/null E/AndroidRuntime(9147): at android.os.Parcel.readException(Parcel.java:1268) E/AndroidRuntime(9147): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:160) E/AndroidRuntime(9147): at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:125) E/AndroidRuntime(9147): at android.content.ContentProviderProxy.openAssetFile(ContentProviderNative.java:538) E/AndroidRuntime(9147): at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:467) E/AndroidRuntime(9147): at android.content.ContentResolver.openFileDescriptor(ContentResolver.java:380) E/AndroidRuntime(9147): at it.bisemanuDEV.slidepuzzle.TileView.getImageFromUri(TileView.java:559) E/AndroidRuntime(9147): at it.bisemanuDEV.slidepuzzle.TileView.newGame(TileView.java:156) E/AndroidRuntime(9147): at it.bisemanuDEV.slidepuzzle.SlidePuzzleActivity.onOptionsItemSelected(SlidePuzzleActivity.java:377) E/AndroidRuntime(9147): at android.app.Activity.onMenuItemSelected(Activity.java:2762) E/AndroidRuntime(9147): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:730) E/AndroidRuntime(9147): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:143) E/AndroidRuntime(9147): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855) E/AndroidRuntime(9147): at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:532) E/AndroidRuntime(9147): at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122) E/AndroidRuntime(9147): at android.view.View$PerformClick.run(View.java:8819) E/AndroidRuntime(9147): at android.os.Handler.handleCallback(Handler.java:603) E/AndroidRuntime(9147): at android.os.Handler.dispatchMessage(Handler.java:92) E/AndroidRuntime(9147): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime(9147): at android.app.ActivityThread.main(ActivityThread.java:4627) E/AndroidRuntime(9147): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(9147): at java.lang.reflect.Method.invoke(Method.java:521) E/AndroidRuntime(9147): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) E/AndroidRuntime(9147): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) E/AndroidRuntime(9147): at dalvik.system.NativeStart.main(Native Method) </code></pre>
 

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