内容提供者Content Provider

*读取联系人

StringBuilder sb = new StringBuilder();
// 1:得到中间人。
ContentResolver resolver = getContentResolver();
// 2:地址。
// contacts;com.android.contacts:表示2个都可以
String raw_contact_host = "content://com.android.contacts/raw_contacts";
String data_host = "content://com.android.contacts/data";
Uri uri = Uri.parse(raw_contact_host);
Uri data_uri = Uri.parse(data_host);
// 3:查询数据。
Cursor cursor = resolver.query(uri, new String[] { "_id", "display_name" }, null, null, null);
while (cursor.moveToNext()) {
    // contact_id
    int id = cursor.getInt(cursor.getColumnIndex("_id"));
    // ContentResolver resolver2 = getContentResolver();
    Cursor data_cursor = resolver.query(data_uri, null, "raw_contact_id=?", new String[] { id + "" }, null)
    while (data_cursor.moveToNext()) {
        String mimytype = data_cursor.getString(data_cursor.getColumnIndex("mimetype"));
        String data = data_cursor.getString(data_cursor.getColumnIndex("data1"));

        if (mimytype.equals("vnd.android.cursor.item/phone_v2")) {
            // 电话号码
            sb.append("电话号码:" + data);
        } else if (mimytype.equals("vnd.android.cursor.item/name")) {
            sb.append("名字:" + data);
        } else if (mimytype.equals("vnd.android.cursor.item/organization")) {
            sb.append("组织:" + data);
        }
    }
    // data_cursor.close();
    String display_name = cursor.getString(cursor.getColumnIndex("display_name"));
    sb.append("姓名:" + display_name);
}
cursor.close();
return sb.toString();

*读取短信

resolver = getContentResolver();
add = "content://sms/";
uri = Uri.parse(add);
// 1:得到中间人。
// 2:知道地址。
// 查询所有的短信。
// address:表示发短信的号码，date;发送的日期.body:发送的内容:这些都需要查看表才知道，不需要记忆。
Cursor cursor = resolver.query(uri, new String[] { "address", "date", "body" }, null, null, null);
while (cursor.moveToNext()) {
    String address = cursor.getString(cursor.getColumnIndex("address"));
    String body = cursor.getString(cursor.getColumnIndex("body"));
    int date = cursor.getInt(cursor.getColumnIndex("date"));
    System.out.println(address + "--" + body + "----" + date);
}
cursor.close();

*内容提供者

/*
 * authorities  ;主机名。
 * 1:创建一些地址。
 * http://www.sina.com/index.html
 * 访问别人的数据。
 * content://主机名/
 * content://com.qf.day15_sqlitedemo1.person/person ------1
 */
public class PersonContentProvider extends ContentProvider {
    private  static UriMatcher match;
    private static final String AUTHORITIES = "com.qf.day15_sqlitedemo1.person";
    private PersonSqliteOpenHelper helper;
    private SQLiteDatabase db;
    static{
        //创建匹配器。
        match = new UriMatcher(UriMatcher.NO_MATCH);//当不匹配的时候就返回-1
        //http://www.sina.com/
        //content://com.qf.day15_sqlitedemo1.person/person
        match.addURI(AUTHORITIES, "person", 1);//表示查询person里面的所有数据。
        match.addURI(AUTHORITIES, "person_id/#", 2);//表示查询person表中的id号为固定值的数据。
        match.addURI(AUTHORITIES, "person_name/*", 3);
    }
    //内容提供者创建的时候调用。
    @Override
    public boolean onCreate() {
        helper = new PersonSqliteOpenHelper(getContext());
        db = helper.getWritableDatabase();
        return true;
    }

    //查询
    @Override
    public Cursor query(Uri uri, String[] projection, String selection,
            String[] selectionArgs, String sortOrder) {
        Cursor cursor = null;
        //将别的应用的地址跟我们自己定义的地址进行匹配。
        int code = match.match(uri);
        System.out.println(code);
        //对值进行判断。
        if(code==1){
            cursor = db.query("person", projection, selection, selectionArgs, null, null, null);
        }else if(code==2){
            //获得id号
            int id =Integer.parseInt( uri.getLastPathSegment());
            cursor = db.query("person", projection, "_id=?", new String[]{id+""}, null, null, null);
        }
        return cursor;
    }
    //返回类型--一般不用
    @Override
    public String getType(Uri uri) {
        return null;
    }
    //插入数据
    @Override
    public Uri insert(Uri uri, ContentValues values) {
        return null;
    }
    //删除数据
    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        return 0;
    }
    //更新数据
    @Override
    public int update(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        return 0;
    }

}

 注：记得配置读写短信和读写联系人的权限

<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_SMS" />