摘要:
1. package com.example.myapplication; import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertD 阅读全文
摘要:
1. <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android 阅读全文