android-contentprovider

问题 At the bottom of the section in Google's dev guide on expansion files (http://developer.android.com/guide/market/expansion-files.html#ZipLib) there is the following text. APEZProvider - Most applications don't need to use this class. This class defines a ContentProvider that marshals the data from the ZIP files through a content provider Uri in order to provide file access for certain Android APIs that expect Uri access to media files. The sample application available in the Apk Expansion

问题 How to get the facebook id or url of a contacts that's been synced to the native contacts app via Facebook sync adapter? I went through different urls, but didn't see any info regarding facebook. I tried ContactsContract.Data.CONTENT_URI ContactsContract.CommonDataKinds.Email.CONTENT_URI ContactsContract.CommonDataKinds.Phone.CONTENT_URI ContactsContract.Contacts.CONTENT_URI as URIs already in the code below: Uri uri = ContactsContract.Data.CONTENT_URI; Cursor c = getContentResolver().query

问题 I've got two loaders, each of which loads data from a different content provider. The fragment is supplied with the ID of a medication from the first content provider, and the first loader loads all of the information related to that medication. The second loader is supposed to query the second content provider for all of the alarms associated with that medication. The first loader works just fine, and returns all of the correct data. However, the second loader appears to return a null cursor

问题 I've built my own content provider and I've run into an instance where I need to execute a query and include a limit param. The method call to managedQuery doesn't include this param and there fore I see no way to implement this w/o somehow overriding the managedQuery method? I've created a second query method in my content provider which accepts an additional param, the limit param but I don't think I can make the managedQuery method call this custom query method of my content provider. What

问题 Haloa ^^ I have the following issue : 02-16 21:08:13.550 2350-2350/com.tutos.android.content.provider E/ActivityThread﹕ Failed to find provider info for com.tutos.android.content.provider.androidprovider 02-16 21:08:13.550 2350-2350/com.tutos.android.content.provider D/AndroidRuntime﹕ Shutting down VM 02-16 21:08:13.550 2350-2350/com.tutos.android.content.provider E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.tutos.android.content.provider, PID: 2350 java.lang.RuntimeException: Unable

问题 When I get the data from the server, I insert the data into the my own content provider, but it always error. This is the log Caused by: java.lang.IllegalStateException: database not open at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1585) at com.weiboa.data.StatusProvider.insert(StatusProvider.java:107 at android.content.ContentProvider$Transport.insert(ContentProvider.java:210) at android.content.ContentResolver.insert(ContentResolver.java:606) at com

问题 I'm attempting to take a very generic approach in providing sharing options for sharing images from my app's private storage, but I've encountered a problem that appears to be specific to sharing images to the Facebook app (com.facebook.katana): I launch an intent with EXTRA_STREAM containing a Uri to an image inside the private directory of my app. Through a ContentProvider, I provide access to the desired file by returning the following in openFile() : return ParcelFileDescriptor.open(file,

问题 I do have a problem that gives me a headache. I store some images of my city in the sqlite database via a custom content provider. However when I run my app I get a null cursor. Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'int android.database.Cursor.getCount()' on a null object reference at theo.testing.androidcustomloaders.fragments.MainActivityFragment.onActivityCreated(MainActivityFragment.java:74) at android.support.v4.app.Fragment.performActivityCreated

问题 This is a question about image saving in android app. I am trying to make popular movies app of an udacity project.Link - https://docs.google.com/document/d/1gtXUu1nzLGWrGfVCD6tEA0YHoYA9UNyT2yByqjJemp8/pub?embedded=true I have picasso library for image downloading in ImageAdapter-- Here is my ImageAdapter code - package jindal5.mayank.popular_movies_14ce10032_gsc; public class ImageAdapter extends BaseAdapter { private String drawablePrefix; private Context mContext; private ArrayList<String>

问题 I googled several times but couldn't find what I was looking for. Android assigns an id to each sms message. I wanted to know if this id is always unique? Can I rely on it to identify sms messages or should I assign my own? Thanks :) 回答1: Since it uses the SQLite, that is a relational database, it's impossible to have a duplicate identifier. 回答2: Check out the source code for MmsSmsDatabaseHelper and note the implementation of the createSmsTables method: private void createSmsTables