ManagedQuery在Android中已被弃用,推荐使用ContentResolver来代替,以下是使用ContentResolver进行查询的示例:
获取ContentResolver对象:ContentResolver contentResolver = getContentResolver();
构建Uri对象,表示要查询的内容URI:Uri uri = Uri.parse("content://com.example.provider/book");
定义要查询的列:String[] projection = {"_id", "name", "author"};
执行查询操作:Cursor cursor = contentResolver.query(uri, projection, null, null, null);
遍历查询结果:if (cursor != null) {while (cursor.moveToNext()) {int id = cursor.getInt(cursor.getColumnIndex("_id"));String name = cursor.getString(cursor.getColumnIndex("name"));String author = cursor.getString(cursor.getColumnIndex("author"));// 处理查询结果}}
关闭Cursor:if (cursor != null) {cursor.close();}
请注意,这只是一个基本示例,具体的查询条件和操作根据实际需求进行调整。