参考：contentprovider的学习实例总结 http://www.cnblogs.com/chenglong/articles/1892029.html
Android学习十九：ContentProvider初步 http://blog.sina.com.cn/s/blog_5688414b0100xagp.html
android 自定义 Content Provider示例 http://byandby.iteye.com/blog/837466
实例源码下载：http://download.csdn.net/detail/yang_hui1986527/4430639
Profile.java
package com.snowdream.contentprovider;
import android.net.Uri;
public class Profile {
/**
* 表格名称
*/
public static final String TABLE_NAME = "profile";
/**
* 列表一，_ID，自动增加
*/
public static final String COLUMN_ID = "_id";
/**
* 列表二，名称
*/
public static final String COLUMN_NAME = "name";
public static final String AUTOHORITY = "com.snowdream.provider";
public static final int ITEM = 1;
public static final int ITEM_ID = 2;
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/vnd.snowdream.profile";
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.snowdream.profile";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTOHORITY + "/profile");
}
package com.snowdream.contentprovider;
import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DBHelper extends SQLiteOpenHelper {
/**
* 数据库名称
*/
private static final String DATABASE_NAME = "test.db";
/**
* 数据库版本
*/
private static final int DATABASE_VERSION = 1;
public DBHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) throws SQLException {
//创建表格
db.execSQL("CREATE TABLE IF NOT EXISTS "+ Profile.TABLE_NAME + "("+ Profile.COLUMN_ID +" INTEGER PRIMARY KEY AUTOINCREMENT," + Profile.COLUMN_NAME +" VARCHAR NOT NULL);");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) throws SQLException {
//删除并创建表格
db.execSQL("DROP TABLE IF EXISTS "+ Profile.TABLE_NAME+";");
onCreate(db);
}
}
MyProvider.java
package com.snowdream.contentprovider;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
public class MyProvider extends ContentProvider {
DBHelper mDbHelper = null;
SQLiteDatabase db = null;
private static final UriMatcher mMatcher;
static{
mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
mMatcher.addURI(Profile.AUTOHORITY,Profile.TABLE_NAME, Profile.ITEM);
mMatcher.addURI(Profile.AUTOHORITY, Profile.TABLE_NAME+"/#", Profile.ITEM_ID);
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}
@Override
public String getType(Uri uri) {
switch (mMatcher.match(uri)) {
case Profile.ITEM:
return Profile.CONTENT_TYPE;
case Profile.ITEM_ID:
return Profile.CONTENT_ITEM_TYPE;
default:
throw new IllegalArgumentException("Unknown URI"+uri);
}
}
@Override
public Uri insert(Uri uri, ContentValues values) {
// TODO Auto-generated method stub
long rowId;
if(mMatcher.match(uri)!=Profile.ITEM){
throw new IllegalArgumentException("Unknown URI"+uri);
}
rowId = db.insert(Profile.TABLE_NAME,null,values);
if(rowId>0){
Uri noteUri=ContentUris.withAppendedId(Profile.CONTENT_URI, rowId);
getContext().getContentResolver().notifyChange(noteUri, null);
return noteUri;
}
throw new SQLException("Failed to insert row into " + uri);
}
@Override
public boolean onCreate() {
// TODO Auto-generated method stub
mDbHelper = new DBHelper(getContext());
db = mDbHelper.getReadableDatabase();
return true;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
// TODO Auto-generated method stub
Cursor c = null;
switch (mMatcher.match(uri)) {
case Profile.ITEM:
c = db.query(Profile.TABLE_NAME, projection, selection, selectionArgs, null, null, sortOrder);
break;
case Profile.ITEM_ID:
c = db.query(Profile.TABLE_NAME, projection,Profile.COLUMN_ID + "="+uri.getLastPathSegment(), selectionArgs, null, null, sortOrder);
break;
default:
throw new IllegalArgumentException("Unknown URI"+uri);
}
c.setNotificationUri(getContext().getContentResolver(), uri);
return c;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}
}
MainActivity.java
package com.snowdream.contentprovider;
import com.snowdream.contentprovider.R;
import android.app.ListActivity;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.widget.SimpleCursorAdapter;
public class MainActivity extends ListActivity {
private SimpleCursorAdapter adapter= null;
private Cursor mCursor = null;
private ContentResolver mContentResolver = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initData();
initAdapter();
}
public void initData(){
mContentResolver = getContentResolver();
//填充数据
for (int i = 0; i < 100; i++) {
ContentValues values = new ContentValues();
values.put(Profile.COLUMN_NAME, "张三"+i);
mContentResolver.insert(Profile.CONTENT_URI, values);
}
}
public void initAdapter(){
//查询表格，并获得Cursor
//查询全部数据
mCursor = mContentResolver.query(Profile.CONTENT_URI, new String[]{Profile.COLUMN_ID,Profile.COLUMN_NAME}, null, null, null);
//查询部分数据
//String selection = Profile.COLUMN_ID + " LIKE '%1'";
//mCursor = mContentResolver.query(Profile.CONTENT_URI, new String[]{Profile.COLUMN_ID,Profile.COLUMN_NAME}, selection, null, null);
//查询一个数据
//Uri uri = ContentUris.withAppendedId(Profile.CONTENT_URI, 50);
//mCursor = mContentResolver.query(uri, new String[]{Profile.COLUMN_ID,Profile.COLUMN_NAME}, null, null, null);
startManagingCursor(mCursor);
//设置adapter
adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, mCursor, new String[]{Profile.COLUMN_ID,Profile.COLUMN_NAME}, new int[]{android.R.id.text1,android.R.id.text2});
setListAdapter(adapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
预览效果：
