这是有效的！我不确定发生了什么变化。我确实使用 git，而且我已经查看了我的提交和代码几个小时了。
正如标题所示，我的 uri 匹配器停止匹配。
下面我粘贴了我的内容提供者的相关部分。
public class Provider extends ContentProvider {
private static final String TAG = "Provider";
private static final String SCHEME = ContentResolver.SCHEME_CONTENT;
private static final String AUTHORITY = "com.snot.bodyweightworkout.database.provider";
private static final String BASE_URI = SCHEME + AUTHORITY;
public static final Uri URI_EXERCISES = Uri.parse(BASE_URI + "/exercise");
public static final Uri URI_PROGRAMS = Uri.parse(BASE_URI + "/program");
public static final Uri URI_PROGRAM_EXERCISES = Uri.parse(BASE_URI + "/program/#/exercise");
private static final int EXERCISE = 1;
private static final int EXERCISES = 2;
private static final int PROGRAM = 3;
private static final int PROGRAMS = 4;
private static final int PROGRAM_EXERCISES = 5;
private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH);
static
{
sURIMatcher.addURI(AUTHORITY, "/exercise", EXERCISES);
sURIMatcher.addURI(AUTHORITY, "/exercise/#", EXERCISE);
sURIMatcher.addURI(AUTHORITY, "/program", PROGRAMS);
sURIMatcher.addURI(AUTHORITY, "/program/#", PROGRAM);
sURIMatcher.addURI(AUTHORITY, "/program/#/exercise", PROGRAM_EXERCISES);
}
...
然后是应该进行实际匹配的部分。
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
Log.v(TAG, "URI: " + uri);
Cursor result = null;
int match = sURIMatcher.match(uri);
switch(match)
{
case PROGRAMS:
result = DatabaseHandler
.getInstance(getContext())
.getReadableDatabase()
.query(Program.TABLE_NAME, Program.FIELDS, null, null, null, null, null, null);
result.setNotificationUri(getContext().getContentResolver(), URI_PROGRAMS);
break;
case PROGRAM:
final long pid = Long.parseLong(uri.getLastPathSegment());
result = DatabaseHandler
.getInstance(getContext())
.getReadableDatabase()
.query(Program.TABLE_NAME, Program.FIELDS,
Program.COL_ID + " IS ?",
new String[] { String.valueOf(pid) }, null, null, null, null);
result.setNotificationUri(getContext().getContentResolver(), URI_PROGRAMS);
break;
...
default:
throw new UnsupportedOperationException("Unmatched(" + match + ") URI: " + uri.toString());
我正在尝试使用这样的游标加载器进行查询：
getLoaderManager().initLoader(0, null, new LoaderManager.LoaderCallbacks<Cursor>() {
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
return new CursorLoader(getActivity(), Provider.URI_PROGRAMS, Program.FIELDS, null, null, null);
}
每次默认都会被击中。不匹配我最终得到一个 FC 和我的日志中的以下行。
E/AndroidRuntime( 1979): Caused by: java.lang.UnsupportedOperationException: Unmatched(-1) URI: content://com.snot.bodyweightworkout.database.provider/program
我已经主演了好几个小时了，我真的需要一些新鲜的眼睛来达到顶峰。因此，如果某个善良的灵魂可以看看它，我将非常感激。提前致谢。