内容提供者ContentProvider
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首先在需要提供内容提供者的应用中添加内容提供者的代码
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package com.example.sqllite;
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import com.example.sqllite.servise.DBOpenHelp;
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import android.content.ContentProvider;
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import android.content.ContentUris;
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import android.content.ContentValues;
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import android.content.UriMatcher;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteDatabase;
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import android.net.Uri;
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public class personProvider extends ContentProvider {
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private DBOpenHelp dbOpenHelp;
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//Uri匹配器,检验是否匹配
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private static final UriMatcher MATCHER=new UriMatcher(UriMatcher.NO_MATCH);
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private static final int SUCCESS=1;
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static {
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MATCHER.addURI("com.contentProvide.providers.personProvides", "person", SUCCESS);
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}
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@Override
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public boolean onCreate() {
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dbOpenHelp=new DBOpenHelp(this.getContext());
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return true;
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}
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@Override
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public int delete(Uri uri, String selection, String[] selectionArgs) {
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// TODO Auto-generated method stub
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return 0;
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}
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@Override
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public String getType(Uri uri) {
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// TODO Auto-generated method stub
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return null;
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}
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@Override
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public Uri insert(Uri uri, ContentValues values) {
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SQLiteDatabase db=dbOpenHelp.getWritableDatabase();
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switch (MATCHER.match(uri)) {
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case SUCCESS:
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long rowID=db.insert("person", "name", values);
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//Uri insertUri=Uri.parse("content://com.contentProvide.providers.personProvides/person/"+rowID);
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Uri insertUri=ContentUris.withAppendedId(uri, rowID);
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db.close();
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return insertUri;
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default:
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throw new IllegalArgumentException("未知的Uir");
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}
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}
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@Override
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public Cursor query(Uri uri, String[] projection, String selection,
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String[] selectionArgs, String sortOrder) {
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// TODO Auto-generated method stub
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return null;
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}
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@Override
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public int update(Uri uri, ContentValues values, String selection,
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String[] selectionArgs) {
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// TODO Auto-generated method stub
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return 0;
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}
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}
2.在原应用中添加配置项
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.sqllite"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.sqllite.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- 添加内容提供者的配置 -->
<provider android:name=".personProvider" android:authorities="com.contentProvide.providers.personProvides"/>
</application>
</manifest>
3.新应用中进行访问
Uri uri=Uri.parse("content://com.contentProvide.providers.personProvides/person");
//访问contentProvider的帮助类
ContentResolver resolver=this.getApplicationContext().getContentResolver();
ContentValues values=new ContentValues();
values.put("name", "hahha");
values.put("age", 33);
values.put("amount", "123");
resolver.insert(uri, values);