<application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".MainActivity"android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter><intent-filter><data android:mimeType="vnd.android.cursor.dir/person" /></intent-filter><intent-filter><data android:mimeType="vnd.android.cursor.item/person" /></intent-filter></activity><!-- 配置内容提供者,android:authorities为该内容提供者取名作为在本应用中的唯一标识 --><provider android:name=".providers.PersonProvider" android:authorities="cn.xyCompany.providers.personProvider"/></application>

内容提供者
package cn.xy.cotentProvider.app.providers;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.util.Log;
import cn.xy.cotentProvider.service.DBOpeningHelper;/*** contentProvider作为一种组件必须放在应用所在包或其子包下，主要作用是对外共享数据* 测试步骤1：将本项目先部署* 测试步骤2：调用测试方法* @author xy* */
public class PersonProvider extends ContentProvider
{private DBOpeningHelper dbHelper;// 若不匹配采用UriMatcher.NO_MATCH(-1)返回private static final UriMatcher MATCHER = new UriMatcher(UriMatcher.NO_MATCH);// 匹配码private static final int CODE_NOPARAM = 1;private static final int CODE_PARAM = 2;static{// 对等待匹配的URI进行匹配操作，必须符合cn.xyCompany.providers.personProvider/person格式// 匹配返回CODE_NOPARAM，不匹配返回-1MATCHER.addURI("cn.xyCompany.providers.personProvider", "person", CODE_NOPARAM);// #表示数字 cn.xyCompany.providers.personProvider/person/10// 匹配返回CODE_PARAM，不匹配返回-1MATCHER.addURI("cn.xyCompany.providers.personProvider", "person/#", CODE_PARAM);}@Overridepublic boolean onCreate(){dbHelper = new DBOpeningHelper(this.getContext());return true;}/*** 外部应用向本应用插入数据*/@Overridepublic Uri insert(Uri uri, ContentValues values){SQLiteDatabase db = dbHelper.getWritableDatabase();switch (MATCHER.match(uri)){case CODE_NOPARAM:// 若主键值是自增长的id值则返回值为主键值，否则为行号，但行号并不是RecNo列long id = db.insert("person", "name", values); Uri insertUri = ContentUris.withAppendedId(uri, id); return insertUri;default:throw new IllegalArgumentException("this is unkown uri:" + uri);}}/*** 外部应用向本应用删除数据*/@Overridepublic int delete(Uri uri, String selection, String[] selectionArgs){SQLiteDatabase db = dbHelper.getWritableDatabase();switch (MATCHER.match(uri)){case CODE_NOPARAM:return db.delete("person", selection, selectionArgs); // 删除所有记录case CODE_PARAM:long id = ContentUris.parseId(uri); // 取得跟在URI后面的数字Log.i("provider", String.valueOf(id));String where = "id = " + id;if (null != selection && !"".equals(selection.trim())){where += " and " + selection;}return db.delete("person", where, selectionArgs);default:throw new IllegalArgumentException("this is unkown uri:" + uri);}}/*** 外部应用向本应用更新数据*/@Overridepublic int update(Uri uri, ContentValues values, String selection, String[] selectionArgs){SQLiteDatabase db = dbHelper.getWritableDatabase();switch (MATCHER.match(uri)){case CODE_NOPARAM:return db.update("person",values,selection, selectionArgs); // 更新所有记录case CODE_PARAM:long id = ContentUris.parseId(uri); // 取得跟在URI后面的数字String where = "id = " + id;if (null != selection && !"".equals(selection.trim())){where += " and " + selection;}return db.update("person",values,where,selectionArgs);default:throw new IllegalArgumentException("this is unkown uri:" + uri);}}/*** 返回对应的内容类型* 如果返回集合的内容类型，必须以vnd.android.cursor.dir开头* 如果是单个元素，必须以vnd.android.cursor.item开头*/@Overridepublic String getType(Uri uri){switch(MATCHER.match(uri)){case CODE_NOPARAM:return "vnd.android.cursor.dir/person";case CODE_PARAM:return "vnd.android.cursor.item/person";default:throw new IllegalArgumentException("this is unkown uri:" + uri);}}@Overridepublic Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder){SQLiteDatabase db = dbHelper.getReadableDatabase();switch (MATCHER.match(uri)){case CODE_NOPARAM:return db.query("person", projection, selection, selectionArgs, null, null, sortOrder);case CODE_PARAM:long id = ContentUris.parseId(uri); // 取得跟在URI后面的数字String where = "id = " + id;if (null != selection && !"".equals(selection.trim())){where += " and " + selection;}return db.query("person", projection, where, selectionArgs, null, null, sortOrder);default:throw new IllegalArgumentException("this is unkown uri:" + uri);}}}测试代码
package cn.xy.test.test;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.test.AndroidTestCase;
import android.util.Log;/*** 测试代码* @author xy**/
public class TestProviders extends AndroidTestCase
{// 在执行该测试方法时需要先将还有内容提供者的项目部署到Android中，否则无法找到内容提供者public void testInsert(){Uri uri = Uri.parse("content://cn.xyCompany.providers.personProvider/person");ContentResolver resolver = this.getContext().getContentResolver();ContentValues values = new ContentValues();values.put("name", "xy");values.put("phone", "111");resolver.insert(uri, values); // 内部调用内容提供者的insert方法
    }// 不带id参数的删除public void testDelete1(){Uri uri = Uri.parse("content://cn.xyCompany.providers.personProvider/person");ContentResolver resolver = this.getContext().getContentResolver();int rowAffect = resolver.delete(uri, null, null);Log.i("rowAffect", String.valueOf(rowAffect));}// 带参数的删除，通过URI传递了id至contentProvider并可追加其他条件public void testDelete2(){Uri uri = Uri.parse("content://cn.xyCompany.providers.personProvider/person/18");ContentResolver resolver = this.getContext().getContentResolver();int rowAffect = resolver.delete(uri, "name = ?", new String[] { "XY2" }); // 在provider中手动进行了拼装Log.i("rowAffect", String.valueOf(rowAffect));}public void testUpdate(){Uri uri = Uri.parse("content://cn.xyCompany.providers.personProvider/person/19");ContentResolver resolver = this.getContext().getContentResolver();ContentValues values = new ContentValues();values.put("name", "newxy");values.put("phone", "new111");int rowAffect = resolver.update(uri, values, null, null);Log.i("rowAffect", String.valueOf(rowAffect));}public void testQuery(){Uri uri = Uri.parse("content://cn.xyCompany.providers.personProvider/person/19");ContentResolver resolver = this.getContext().getContentResolver();Cursor cursor = resolver.query(uri, new String[]{"id","name","phone"}, null, null, "id asc");if(cursor.moveToFirst()){Log.i("query", cursor.getString(cursor.getColumnIndex("name")));}cursor.close();}
}

分类: Android Pro

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