ContentProvider    ——>    ContentResolver

    内容提供者           URI          内容访问者

URI:统一资源标识符    //URL（是URI的一种）：统一资源定位符

注册ContentProvider：

    name:全路径

    authorities：认证，Uri的一部分，name的小写        //    uri = Uri.parse("content://" + AUTHORITY);

    exported:能否让别的应用程序访问当前程序的数据

1.ContentResolver：

a.获取通话记录    权限：READ_CALL_LOG

    Uri uri = CallLog.Calls.CONTENT_URI;    //    Uri.parse("content://call_log/calls")

    private ContentResolver resolver;

    resolver = getContentResolver();

    String[] projection = new String{

        CallLog.Calls._ID,                        //"_id"

        CallLog.Calls.CACHED_NAME,    //"name"

        CallLog.Calls.NUMBER,               //"number"

        CallLog.Calls.TYPE,                     //"type"

        CallLog.Calls.DATE                     //"date"

    };

    Cursor cursor = resolver.query(uri,projection,null,null,null);

b.获取短信记录    权限：READ_SMS

    Uri uri = Sms.CONTENT_URI;    //    Uri.parse("content://sms")

    String[] projection = new String[]{

        Sms.Draft._ID,                //"_id"

        Sms.Draft.ADDRESS,      //"address"

        Sms.Draft.BODY,            //"body"

        Sms.Draft.TYPE              //"type"

    };

    SimpleCursorAdapter()中from为projection

c.联系人    权限：READ_CONTACTS、WRITE_CONTACTS

  两张表    View_raw_contacts、View_data(在data/data/com.android.contacts/database/contact2.db数据库中)

    Uri rawUri = ContactsContract.RAWContacts.CONTENT_URI;    //    Uri.parse("content://com.android.contacts/raw_contacts")

    Uri dataUri = ContactsContract.Data.CONTENT_URI;    //    Uri.parse("content://com.android.contacts/data")

    Cursor rawCursor = resolver.query(rawUri, new String[]{"_id","contact_id",null,null,null});

    while(rawCursor.moveToNext()){

        String contact_id = rawCursor.getString(rawCursor.getColumnIndex("contact_id"));

        Cursor dataCursor = resolver.query(dataUri,

                                                               new String[]{""_id,"data1","mimtype"},

                                                               "raw_contact_id=?",

                                                                new String[]{contact_id},

                                                                null);

        while(dataCursor.moveToNext()){

            String mimetype = dataCursor.getString(dataCursor.getColumnIndex("mimetype"));

            String data1 = dataCursor.getString(dataCursor.getColumnIndex("data1"));

            if ("vnd.android.cursor.item/phone_v2".equals(mimetype)) {

                Log.i("info","联系人ID：" + contact_id + "，电话：" + data1);             } else if ("vnd.android.cursor.item/email_v2".equals(mimetype)) {                 Log.i("info",""联系人ID：" + contact_id + "，email：" + data1);             } else if ("vnd.android.cursor.item/name".equals(mimetype)) {                 Log.i("info",""联系人ID：" + contact_id + "，联系人姓名：" + data1);             }

        }

    }

    不能用SimpleCursorAdapter

2.Android四大组件之ContentProvider