android - URIMatcher 不匹配

Question

这很有效!我不确定发生了什么变化。我确实使用 git，现在我已经检查了我的提交和代码几个小时。

如标题所示，我的 uri 匹配器已停止匹配。

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);
         }

每次默认都被命中。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

我已经关注这个几个小时了，我真的需要一些新鲜的眼光来达到顶峰。因此，如果有好心人可以看一看，我将非常感激。提前致谢。

Answer 1

不需要起始 /，因此定义您的 addUri() 方法调用如下:

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);
}