uri new uri=uri.parse("content://com.changcheng.provider.contactprovider/contact")
uri uri=Uri.parse("content://com.changcheng.provider.contactprovider/contact")
android.uri uri=uri.parse("content://com.changcheng.provider.contactprovider/contact")
uri uri=android.uri.parse("content://com.changcheng.provider.contactprovider/contact")