安卓 : Content Provider : Uri Type Wrong on Jellybean 4. 2.2

转载作者：行者123 更新时间：2023-11-29 20:06:57

我在 Jellybean 4.2.2 上获取正确的 uriType 时遇到问题。下面给出的代码在其他版本上工作正常。

package com.karacraft.security;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;   
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.util.Log;

import com.karacraft.data.ItemsContract;
import com.karacraft.data.MasterSahabDatabaseHelper;
import com.karacraft.data.MerchandisesContract;
import com.karacraft.data.OrdersContract;
import com.karacraft.data.StaffContract;
import com.karacraft.data.StatsContract;
import com.karacraft.data.SuitsContract;
import com.karacraft.data.TailorsContract;
import com.karacraft.utils.Constants;


public class MasterSahabProvider extends ContentProvider
{
public static final String AUTHORITY ="com.karacraft.security.mastersahab";
public static final String KEY_URI = "/#";

//database
private MasterSahabDatabaseHelper database;

//Table Names
private static final String ITEMS_TABLE         = "/" + ItemsContract.TABLE_ITEMS;
private static final String MERCHANDISES_TABLE  = "/" + MerchandisesContract.TABLE_MERCHANDISES;
private static final String ORDERS_TABLE        = "/" + OrdersContract.TABLE_ORDERS;
private static final String SUITS_TABLE         = "/" + SuitsContract.TABLE_SUITS;
private static final String TAILORS_TABLE       = "/" + TailorsContract.TABLE_TAILORS;
private static final String STAFF_TABLE         = "/" + StaffContract.TABLE_STAFF;
private static final String STATS_TABLE         = "/" + StatsContract.TABLE_STATS;

//Uri for Multiple Tables
public static final Uri CONTENT_URI_ITEMS           = Uri.parse("content://" + AUTHORITY + ITEMS_TABLE);
public static final Uri CONTENT_URI_MERCHANDISES    = Uri.parse("content://" + AUTHORITY + MERCHANDISES_TABLE);
public static final Uri CONTENT_URI_ORDERS          = Uri.parse("content://" + AUTHORITY + ORDERS_TABLE);
public static final Uri CONTENT_URI_SUITS           = Uri.parse("content://" + AUTHORITY + SUITS_TABLE);
public static final Uri CONTENT_URI_TAILORS         = Uri.parse("content://" + AUTHORITY + TAILORS_TABLE);
public static final Uri CONTENT_URI_STAFF           = Uri.parse("content://" + AUTHORITY + STAFF_TABLE);
public static final Uri CONTENT_URI_STATS           = Uri.parse("content://" + AUTHORITY + STATS_TABLE);

public static final Uri CONTENT_URI_ORDERS_BY_MERC  = Uri.parse("content://" + AUTHORITY + ORDERS_TABLE);

//Return value setup for Uri Matchers
private static final int ITEMS          = 10;
private static final int ITEM_ID        = 20;
private static final int MERCHANDISES   = 30;
private static final int MERCHANDISE_ID = 40;
private static final int ORDERS         = 50;
private static final int ORDERS_ID      = 60;
private static final int SUITS          = 70;
private static final int SUITS_ID       = 80;
private static final int TAILORS        = 90;
private static final int TAILORS_ID     = 100;
private static final int STAFF          = 110;
private static final int STAFF_ID       = 120;
private static final int STATS          = 130;
private static final int STATS_ID       = 140;

private static final int ORDERS_BY_MERC = 200;

//Custom Method
private static final UriMatcher uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
static {
    uriMatcher.addURI(AUTHORITY, ITEMS_TABLE,ITEMS);
    uriMatcher.addURI(AUTHORITY, ITEMS_TABLE + KEY_URI,ITEM_ID);
    uriMatcher.addURI(AUTHORITY, MERCHANDISES_TABLE,MERCHANDISES);
    uriMatcher.addURI(AUTHORITY, MERCHANDISES_TABLE + KEY_URI,MERCHANDISE_ID);
    uriMatcher.addURI(AUTHORITY, ORDERS_TABLE,ORDERS);
    uriMatcher.addURI(AUTHORITY, ORDERS_TABLE + KEY_URI,ORDERS_ID);
    uriMatcher.addURI(AUTHORITY, SUITS_TABLE,SUITS);
    uriMatcher.addURI(AUTHORITY, SUITS_TABLE + KEY_URI,SUITS_ID);
    uriMatcher.addURI(AUTHORITY, TAILORS_TABLE,TAILORS);
    uriMatcher.addURI(AUTHORITY, TAILORS_TABLE + KEY_URI,TAILORS_ID);
    uriMatcher.addURI(AUTHORITY, STAFF_TABLE , STAFF);
    uriMatcher.addURI(AUTHORITY, STAFF_TABLE + KEY_URI, STAFF_ID);
    uriMatcher.addURI(AUTHORITY, STATS_TABLE , STATS);
    uriMatcher.addURI(AUTHORITY, STATS_TABLE + KEY_URI, STATS_ID);

    uriMatcher.addURI(AUTHORITY,ORDERS_TABLE ,ORDERS);
}

public boolean onCreate()
{
    //Create Database
    database = new MasterSahabDatabaseHelper(getContext());
    return false;
}

/**
URI         uri         The URI of the object(s) to access. This is the only argument that must not be null
String[]    projection  This String array indicates which columns/attributes of the objects you want to access
String      selection   With this argument you can determine which records to return
String[]    selectionArgs   The binding parameters to the previous selection argument
String      sortOrder   If the result should be ordered you must use this argument to determine the sort order
*/
@Nullable
@Override
public Cursor query(Uri uri
        , String[] projection
        , String selection
        , String[] selectionArgs
        , String sortOrder)
{
    //Using SQLiteQueryBuilder instead of query() method
    SQLiteQueryBuilder builder = new SQLiteQueryBuilder();
    SQLiteDatabase db = database.getWritableDatabase();
    Cursor cursor=null;

    int uriType = uriMatcher.match(uri);
    Log.d(Constants.APP_TAG,"URIType is : " + uriType);
    Log.d(Constants.APP_TAG,"URI is : " + uri.toString());

    switch (uriType){
        case ITEMS:
            //Set the table
            builder.setTables(ItemsContract.TABLE_ITEMS);
            //adding the ID to original Query
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case ITEM_ID:
            //Set the table
            builder.setTables(ItemsContract.TABLE_ITEMS);
            //adding the ID to original Query
            builder.appendWhere(ItemsContract.ITEM_ID + "=" + uri.getLastPathSegment());
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(), uri);
            break;
        case MERCHANDISES:
            //Set the table
            builder.setTables(MerchandisesContract.TABLE_MERCHANDISES);
            //adding the ID to original Query
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case MERCHANDISE_ID:
            //Set the table
            builder.setTables(MerchandisesContract.TABLE_MERCHANDISES);
            //adding the ID to original Query
            builder.appendWhere(MerchandisesContract.MERCHANDISE_ID + "=" + uri.getLastPathSegment());
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case ORDERS:
            //Set the table
            builder.setTables(OrdersContract.TABLE_ORDERS);
            //adding the ID to original Query
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case ORDERS_ID:
            //Set the table
            builder.setTables(OrdersContract.TABLE_ORDERS);
            //adding the ID to original Query
            builder.appendWhere(OrdersContract.ORDER_ID + "=" + uri.getLastPathSegment());
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case TAILORS:
            //Set the table
            builder.setTables(TailorsContract.TABLE_TAILORS);
            //adding the ID to original Query
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case TAILORS_ID:
            //Set the table
            builder.setTables(TailorsContract.TABLE_TAILORS);
            //adding the ID to original Query
            builder.appendWhere(TailorsContract.TAILOR_ID + "=" + uri.getLastPathSegment());
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case SUITS:
            //Set the table
            builder.setTables(SuitsContract.TABLE_SUITS);
            //adding the ID to original Query
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case SUITS_ID:
            //Set the table
            builder.setTables(SuitsContract.TABLE_SUITS);
            //adding the ID to original Query
            builder.appendWhere(SuitsContract.SUITS_ID + "=" + uri.getLastPathSegment());
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case STAFF:
            //Set the table
            builder.setTables(StaffContract.TABLE_STAFF);
            //adding the ID to original Query
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case STAFF_ID:
            //Set the table
            builder.setTables(StaffContract.TABLE_STAFF);
            //adding the ID to original Query
            builder.appendWhere(StaffContract.STAFF_ID + "=" + uri.getLastPathSegment());
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case STATS:
            //Set the table
            builder.setTables(StatsContract.TABLE_STATS);
            //adding the ID to original Query
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case STATS_ID:
            //Set the table
            builder.setTables(StatsContract.TABLE_STATS);
            //adding the ID to original Query
            builder.appendWhere(StatsContract.STATS_ID + "=" + uri.getLastPathSegment());
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
            break;
        case ORDERS_BY_MERC:
            //Set the table
            //builder.setTables("orders LEFT OUTER JOIN staff ON (orders.staff_id = staff._id)");
            builder.setTables("orders LEFT OUTER JOIN staff ON orders.staff_id = staff._id");
            //builder.setTables("orders,staff");
            //adding the ID to original Query
            cursor = builder.query(db,projection,selection,selectionArgs,null,null,sortOrder);
            // make sure that potential listeners are getting notified
            cursor.setNotificationUri(getContext().getContentResolver(),uri);
        default:
            throw new IllegalArgumentException("Unknown URI: " + uri);
    }
    return cursor;
}

@Nullable
@Override
public String getType(Uri uri)
{
    return null;
}

@Nullable
@Override
public Uri insert(Uri uri
        , ContentValues values)
{
    int uriType = uriMatcher.match(uri);
    SQLiteDatabase db = database.getWritableDatabase();
    Log.d(Constants.APP_TAG,"URIType is : " + uriType);
    Log.d(Constants.APP_TAG,"URI is : " + uri.toString());

    long id = 0;
    switch (uriType){
        case ITEMS:
            id = db.insert(ItemsContract.TABLE_ITEMS, null, values);
            getContext().getContentResolver().notifyChange(uri,null);
            return Uri.parse(ITEMS_TABLE + "/" + id);

        case MERCHANDISES:
            id = db.insert(MerchandisesContract.TABLE_MERCHANDISES,null,values);
            getContext().getContentResolver().notifyChange(uri,null);
            return Uri.parse(MERCHANDISES_TABLE + "/" + id);

        case ORDERS:
            id = db.insert(OrdersContract.TABLE_ORDERS,null,values);
            getContext().getContentResolver().notifyChange(uri,null);
            return Uri.parse(ORDERS_TABLE + "/" + id);

        case SUITS:
            id = db.insert(SuitsContract.TABLE_SUITS,null,values);
            getContext().getContentResolver().notifyChange(uri,null);
            return Uri.parse(SUITS_TABLE + "/" + id);

        case STAFF:
            id = db.insert(StaffContract.TABLE_STAFF,null, values);
            getContext().getContentResolver().notifyChange(uri,null);
            return Uri.parse(STAFF_TABLE + "/" + id);

        case TAILORS:
            id = db.insert(TailorsContract.TABLE_TAILORS,null,values);
            getContext().getContentResolver().notifyChange(uri,null);
            return Uri.parse(TAILORS_TABLE + "/" + id);

        case STATS:
            id = db.insert(StatsContract.TABLE_STATS,null,values);
            getContext().getContentResolver().notifyChange(uri,null);
            return Uri.parse(STATS_TABLE + "/" + id);
        default:
            throw new IllegalArgumentException("Unknown URI: " + uri);
    }
}

@Override
public int delete(Uri uri
        , String selection
        , String[] selectionArgs)
{
    int uriType = uriMatcher.match(uri);
    SQLiteDatabase sqlDB = database.getWritableDatabase();
    int rowsDeleted = 0;
    String id ="";

    Log.d(Constants.APP_TAG,"URIType is : " + uriType);
    Log.d(Constants.APP_TAG,"URI is : " + uri.toString());

    switch (uriType) {
        case ITEMS:
            rowsDeleted = sqlDB.delete(ItemsContract.TABLE_ITEMS, selection, selectionArgs);
            break;
        case ITEM_ID:
            id = uri.getLastPathSegment();
            if (TextUtils.isEmpty(selection)) {
                rowsDeleted = sqlDB.delete(ItemsContract.TABLE_ITEMS, ItemsContract.ITEM_ID + "=" + id, null);
            } else {
                rowsDeleted = sqlDB.delete(ItemsContract.TABLE_ITEMS, ItemsContract.ITEM_ID + "=" + id + " AND " + selection, selectionArgs);
            }
            break;
        case MERCHANDISES:
            rowsDeleted = sqlDB.delete(MerchandisesContract.TABLE_MERCHANDISES, selection, selectionArgs);
            break;
        case MERCHANDISE_ID:
            id = uri.getLastPathSegment();
            if (TextUtils.isEmpty(selection)) {
                rowsDeleted = sqlDB.delete(MerchandisesContract.TABLE_MERCHANDISES, MerchandisesContract.MERCHANDISE_ID+ "=" + id, null);
            } else {
                rowsDeleted = sqlDB.delete(MerchandisesContract.TABLE_MERCHANDISES, MerchandisesContract.MERCHANDISE_ID + "=" + id + " AND " + selection, selectionArgs);
            }
            break;
        case TAILORS:
            rowsDeleted = sqlDB.delete(TailorsContract.TABLE_TAILORS, selection, selectionArgs);
            break;
        case TAILORS_ID:
            id = uri.getLastPathSegment();
            if (TextUtils.isEmpty(selection)) {
                rowsDeleted = sqlDB.delete(TailorsContract.TABLE_TAILORS, TailorsContract.TAILOR_ID + "=" + id, null);
            } else {
                rowsDeleted = sqlDB.delete(TailorsContract.TABLE_TAILORS, TailorsContract.TAILOR_ID + "=" + id + " AND " + selection, selectionArgs);
            }
            break;
        case STAFF:
            rowsDeleted = sqlDB.delete(StaffContract.TABLE_STAFF, selection, selectionArgs);
            break;
        case STAFF_ID:
            id = uri.getLastPathSegment();
            if (TextUtils.isEmpty(selection)) {
                rowsDeleted = sqlDB.delete(StaffContract.TABLE_STAFF, StaffContract.STAFF_ID + "=" + id, null);
            } else {
                rowsDeleted = sqlDB.delete(StaffContract.TABLE_STAFF, StaffContract.STAFF_ID + "=" + id + " AND " + selection, selectionArgs);
            }
            break;
        case SUITS:
            rowsDeleted = sqlDB.delete(SuitsContract.TABLE_SUITS, selection, selectionArgs);
            break;
        case SUITS_ID:
            id = uri.getLastPathSegment();
            if (TextUtils.isEmpty(selection)) {
                rowsDeleted = sqlDB.delete(SuitsContract.TABLE_SUITS, SuitsContract.SUITS_ID + "=" + id, null);
            } else {
                rowsDeleted = sqlDB.delete(SuitsContract.TABLE_SUITS, SuitsContract.SUITS_ID + "=" + id + " AND " + selection, selectionArgs);
            }
            break;
        case ORDERS:
            rowsDeleted = sqlDB.delete(OrdersContract.TABLE_ORDERS, selection, selectionArgs);
            break;
        case ORDERS_ID:
            id = uri.getLastPathSegment();
            if (TextUtils.isEmpty(selection)) {
                rowsDeleted = sqlDB.delete(OrdersContract.TABLE_ORDERS, OrdersContract.ORDER_ID + "=" + id, null);
            } else {
                rowsDeleted = sqlDB.delete(OrdersContract.TABLE_ORDERS, OrdersContract.ORDER_ID + "=" + id + " AND " + selection, selectionArgs);
            }
            break;
        case STATS:
            rowsDeleted = sqlDB.delete(StatsContract.TABLE_STATS, selection, selectionArgs);
            break;
        case STATS_ID:
            id = uri.getLastPathSegment();
            if (TextUtils.isEmpty(selection)) {
                rowsDeleted = sqlDB.delete(StatsContract.TABLE_STATS, StatsContract.STATS_ID + "=" + id, null);
            } else {
                rowsDeleted = sqlDB.delete(StatsContract.TABLE_STATS, StatsContract.STATS_ID + "=" + id + " AND " + selection, selectionArgs);
            }
            break;
        default:
            throw new IllegalArgumentException("Unknown URI: " + uri);
    }
    getContext().getContentResolver().notifyChange(uri, null);
    return rowsDeleted;
}

@Override
public int update(Uri uri
        , ContentValues values
        , String selection
        , String[] selectionArgs)
{
    int uriType = uriMatcher.match(uri);
    SQLiteDatabase db = database.getWritableDatabase();
    int rowsUpdated=0;
    Log.d(Constants.APP_TAG,"URIType is : " + uriType);
    Log.d(Constants.APP_TAG,"URI is : " + uri.toString());

    switch (uriType){
        case ITEMS:
            rowsUpdated = db.update(ItemsContract.TABLE_ITEMS,values,selection,selectionArgs);
            break;
        case ITEM_ID:
            String id = uri.getLastPathSegment();
            if(TextUtils.isEmpty(selection)){
                rowsUpdated = db.update(ItemsContract.TABLE_ITEMS,values, ItemsContract.ITEM_ID + "=" + id,null);
            }else{
                rowsUpdated = db.update(ItemsContract.TABLE_ITEMS,values, ItemsContract.ITEM_ID + "=" + id + " AND " + selection,selectionArgs);
            }
            break;
        default:
            throw new IllegalArgumentException("Unknown URI: " + uri);
    }
    getContext().getContentResolver().notifyChange(uri,null);
    return rowsUpdated;
    }
}

我已经用模拟器和物理设备检查了上面的内容提供程序代码，并且一切正常(我已经在 5.0、5.1 和 6.0 模拟器上试过了)。

这是 (JellyBean 4.2.2) 的 Logcat:

02-20 21:12:27.480 1796-1808/? D/PTI: URIType is : -1
02-20 21:12:27.480 1796-1808/? D/PTI: URI is : content://com.karacraft.security.mastersahab/items
02-20 21:12:27.480 1796-1808/? E/DatabaseUtils: Writing exception to parcel
    java.lang.IllegalArgumentException: Unknown URI: content://com.karacraft.security.mastersahab/items
at com.karacraft.security.MasterSahabProvider.query(MasterSahabProvider.java:260)
at android.content.ContentProvider.query(ContentProvider.java:652)
at android.content.ContentProvider$Transport.query(ContentProvider.java:189)
at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:113)
at android.os.Binder.execTransact(Binder.java:351)
at dalvik.system.NativeStart.run(Native Method)

在其他系统上，URI 总是按预期出现。

这是 KitKat 4.4.4 的 Logcat:

02-21 01:06:51.591 1872-1884/? D/PTI: URIType is : 10
02-21 01:06:51.591 1872-1884/? D/PTI: URI is : content://com.karacraft.security.mastersahab/items
02-21 01:06:51.631 1872-1883/? D/PTI: URIType is : 50
02-21 01:06:51.631 1872-1883/? D/PTI: URI is : content://com.karacraft.security.mastersahab/orders
02-21 01:06:51.631 1872-1884/? D/PTI: URIType is : 70
02-21 01:06:51.631 1872-1884/? D/PTI: URI is : content://com.karacraft.security.mastersahab/suits
02-21 01:06:51.631 1872-1883/? D/PTI: URIType is : 90
02-21 01:06:51.631 1872-1883/? D/PTI: URI is : content://com.karacraft.security.mastersahab/tailors
02-21 01:06:51.631 1872-1884/? D/PTI: URIType is : 130
02-21 01:06:51.631 1872-1884/? D/PTI: URI is : content://com.karacraft.security.mastersahab/stats
02-21 01:06:51.641 1872-1883/? D/PTI: URIType is : 110
02-21 01:06:51.641 1872-1883/? D/PTI: URI is : content://com.karacraft.security.mastersahab/staff
02-21 01:06:51.641 1872-1884/? D/PTI: URIType is : 30
02-21 01:06:51.641 1872-1884/? D/PTI: URI is : content://com.karacraft.security.mastersahab/merchandises

它在 Kitkat 上显示正确的 URI。

找到解决方案，感谢@MARTEN 的回答

将表名的前导斜杠更改为 URI 解决了这个问题。

//Table Names
private static final String ITEMS_TABLE         = "/" + ItemsContract.TABLE_ITEMS;
private static final String MERCHANDISES_TABLE  = "/" + MerchandisesContract.TABLE_MERCHANDISES;
private static final String ORDERS_TABLE        = "/" + OrdersContract.TABLE_ORDERS;
private static final String SUITS_TABLE         = "/" + SuitsContract.TABLE_SUITS;
private static final String TAILORS_TABLE       = "/" + TailorsContract.TABLE_TAILORS;
private static final String STAFF_TABLE         = "/" + StaffContract.TABLE_STAFF;
private static final String STATS_TABLE         = "/" + StatsContract.TABLE_STATS;

//Uri for Multiple Tables
public static final Uri CONTENT_URI_ITEMS           = Uri.parse("content://" + AUTHORITY + ITEMS_TABLE);
public static final Uri CONTENT_URI_MERCHANDISES    = Uri.parse("content://" + AUTHORITY + MERCHANDISES_TABLE);
public static final Uri CONTENT_URI_ORDERS          = Uri.parse("content://" + AUTHORITY + ORDERS_TABLE);
public static final Uri CONTENT_URI_SUITS           = Uri.parse("content://" + AUTHORITY + SUITS_TABLE);
public static final Uri CONTENT_URI_TAILORS         = Uri.parse("content://" + AUTHORITY + TAILORS_TABLE);
public static final Uri CONTENT_URI_STAFF           = Uri.parse("content://" + AUTHORITY + STAFF_TABLE);
public static final Uri CONTENT_URI_STATS           = Uri.parse("content://" + AUTHORITY + STATS_TABLE);

这个

  //Table Names
private static final String ITEMS_TABLE         =  ItemsContract.TABLE_ITEMS;
private static final String MERCHANDISES_TABLE  =  MerchandisesContract.TABLE_MERCHANDISES;
private static final String ORDERS_TABLE        =  OrdersContract.TABLE_ORDERS;
private static final String SUITS_TABLE         =  SuitsContract.TABLE_SUITS;
private static final String TAILORS_TABLE       =  TailorsContract.TABLE_TAILORS;
private static final String STAFF_TABLE         =  StaffContract.TABLE_STAFF;
private static final String STATS_TABLE         =  StatsContract.TABLE_STATS;

//Uri for Multiple Tables
public static final Uri CONTENT_URI_ITEMS           = Uri.parse("content://" + AUTHORITY + "/" + ITEMS_TABLE);
public static final Uri CONTENT_URI_MERCHANDISES    = Uri.parse("content://" + AUTHORITY + "/" +MERCHANDISES_TABLE);
public static final Uri CONTENT_URI_ORDERS          = Uri.parse("content://" + AUTHORITY + "/" +ORDERS_TABLE);
public static final Uri CONTENT_URI_SUITS           = Uri.parse("content://" + AUTHORITY + "/" +SUITS_TABLE);
public static final Uri CONTENT_URI_TAILORS         = Uri.parse("content://" + AUTHORITY + "/" +TAILORS_TABLE);
public static final Uri CONTENT_URI_STAFF           = Uri.parse("content://" + AUTHORITY + "/" +STAFF_TABLE);
public static final Uri CONTENT_URI_STATS           = Uri.parse("content://" + AUTHORITY + "/" +STATS_TABLE);

最佳答案

在 Android 4.3 中添加了对带有前导斜杠的路径的支持。参见 addUri 的描述, 说明

Starting from API level JELLY_BEAN_MR2, this method will accept a leading slash in the path.

因此只需删除路径中的前导斜线即可。

即替换

uriMatcher.addURI(AUTHORITY, ITEMS_TABLE,ITEMS);

通过

uriMatcher.addURI(AUTHORITY, ItemsContract.TABLE_ITEMS);

顺便说一句。 query 方法中的最后一个 case 语句缺少一个 break; 这意味着 Uri 将始终抛出异常.

关于安卓 : Content Provider : Uri Type Wrong on Jellybean 4. 2.2，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35529287/

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安卓 EditText 安卓 :textDirection
我想将 EditText 始终设置为 LTR，我该怎么做？android:textDirection 似乎确实是答案，我无法让项目使用该指令进行编译最佳答案为 editText 使用引力 andr
安卓 AppWidget + 安卓 :clearTaskOnLaunch ="true"
我希望我的应用在每次打开时都显示登录屏幕。使用 android:clearTaskOnLaunch="true" 一切正常。但是有一个错误，只有在手机关机并且应用程序首先使用小部件启动时才会发生。 I
Android WebView 从内部存储加载 |安卓 11 |安卓
实际上我的要求是我想将动态文件加载到像图像一样的网页中。视频，音频等，它来自 Assets 或应用程序自己的文件目录，这不是问题。我尝试使用以下两种方式。方式一这是我的 html 文件在 ass
安卓 DatePickerDialog API 23 (安卓 6)
我正在触发一个 DatePickerDialog，在 api 22 (Android 5.1) 之前它一直在工作并显示良好，我在上面设置混合和最大日期(最小 = 当前日期，最大 = 从当前日期开始的
安卓 : How to avoid header from scrolling in listview , 安卓？
我有一个 ListView ，我在其中将标题 View 添加到该列表。一切都很好，但是当滚动列表 headerview 也随着列表移动时，所以我想避免 headerview 滚动，我的意思是当我列表到
安卓 - 安卓 2.1 上的 SDK 4.0
虽然我在android上做过一些app，但我还是一头雾水。是否可以使用 SDK 4.0 中的功能，并在 android 2.1 或更低版本上运行该应用程序？我尝试了你们提到的方法，但出现错误 - F
安卓 GridView 安卓 :numColumns ="auto_fit" always create only two columns
您好，我正在开发小型 android 应用程序，我想在其中显示带有一些元素的简单 gridview。它工作正常。唯一的问题是即使有空间，它也总是只显示两列。它平均将屏幕分成 2 列并仅显示两个元素。如
安卓 2.3.3 & 4.1.2 安卓 :configChanges for detecting Orientation change
我正在使用 Android 2.3.3 API 构建一个应用程序。我需要识别方向的变化并执行一些操作。所以我在 Android Manifest 中添加了以下内容， android:configCha
安卓 NFC : can we use intent filter with mime type? (安卓 2.3.3)
我正在尝试在“点击”包含特定 MIME 类型的 nfc 标签时开始一项 Activity 。我制作了一个 mime 类型为“text/plain”的标签，并将其添加到 list 中:
安卓。将文件保存到设备上的共享目录中
我可以将一些数据保存到文件中 val byteArrayOutputStream = ByteArrayOutputStream() byteArrayOutputStream.wri
安卓:阿拉伯语字体
我正在尝试解析一个包含复杂阿拉伯字母的 XML 文件.. 当我在 android 2.3.7 上测试时，并不是所有的阿拉伯字母都被支持，仍然有一些复杂的显示为方 block .. 但是在 androi
安卓。确定设备是否为平板电脑的最佳方法是什么？
我需要编写一个方法来确定设备是平板电脑还是手机。我不需要根据这个显示不同的用户界面。我只需要有关设备的信息，以便将来我可以将其发送到指标。在互联网上，我找到了很多方法来确定设备是否是平板电脑。我已经
安卓，文字转语音
我正在玩文字转语音，让我的测试应用程序更有趣。它适用于模拟器，但不适用于我的手机，因为我的默认语言环境不是英语。但是，文本是英文的，所以 tts 当然应该使用英文。据我所知，我可以实现一个自动安装，
安卓。如何使用整洁架构的分页？
我正在使用 MVVM 和整洁的架构编写应用程序。在其中一个屏幕上，我需要使用 pagination 实现 RecyclerView。我将使用库 Paging3。 Android 开发者推荐在存储库层使
安卓。遗失证书如何找回
这个问题在这里已经有了答案: I lost my .keystore file? (12 个回答) 4年前关闭。当我以前的操作系统损坏并安装新的(7 月 3 日)时，以前的 android_key_
安卓。如何使用整洁架构的分页？
我正在使用 MVVM 和整洁的架构编写应用程序。在其中一个屏幕上，我需要使用 pagination 实现 RecyclerView。我将使用库 Paging3。 Android 开发者推荐在存储库层使
安卓|在导航栏上添加行
在我的 v27\style.xml 中，我有以下代码来设置白色导航栏: @color/colorPrimary @color/colorPrimaryDark @color/
安卓。发送多附件电子邮件
我想通过发送电子邮件 startActivity(Intent.createChooser(new Intent(android.content.Intent.ACTION_SEND))) 我知道要将
安卓:自定义列表适配器
我实现了一个自定义 ListView ，它看起来像 Twitter 时间线。 adapter = new MyClickableListAdapter(this, R.layout.timeline,
安卓;带有自定义对话框的进度条
我有一个显示启动画面的自定义对话框； mSplashDialog = new Dialog(MyActivity.this,R.layout.splash); mSplashDialog.setCon

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安卓 : Content Provider : Uri Type Wrong on Jellybean 4. 2.2

找到解决方案，感谢@MARTEN 的回答