Androld 作业

xml

<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.administrator.myapplication.MainActivity">
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Please choose a flower Please choose a flower"           让文字滚动  代码是网上找的 第一次发现字数不够就不能滚动于是就输了两遍
    android:textSize="24sp"
    android:textColor="#0000cd"
    android:singleLine="true"
    android:ellipsize="marquee"
    android:focusableInTouchMode="true"
    android:focusable="true"/>
    <LinearLayout
        android:layout_width="251dp"
        android:layout_height="267dp"
        android:paddingLeft="20dp"
        android:orientation="horizontal">
    <ImageView
        android:id="@+id/img_hua"
        android:layout_width="wrap_content"                               增加一行显示图片，给它一个id在后面调用drawable中的图片
        android:layout_height="wrap_content"
        android:src="@drawable/mudan"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft="20dp"
        android:orientation="horizontal">


    <RadioGroup
        android:id="@+id/rg_hua1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/rbtn_mudan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"                           使用RadioGroup和RadioButton创建一行三个选项，同上又加了一个变成两行六选项肉点小问题
                                                                              就是在实现后两行都可以选一个。
            android:text="牡丹"
            android:textSize="20sp"/>
        <RadioButton
            android:id="@+id/rbtn_yueji"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="月季"
            android:textSize="20sp"/>
        <RadioButton
            android:id="@+id/rbtn_lanhua"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="兰花"
            android:textSize="20sp"/>
            </RadioGroup>
    </LinearLayout>
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft="20dp"
        android:orientation="horizontal">

        <RadioGroup
            android:id="@+id/rg_hua2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <RadioButton
                android:id="@+id/rbtn_qiangwei"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="蔷薇"
                android:textSize="20sp"/>
            <RadioButton
                android:id="@+id/rbtn_yinghua"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="樱花"
                android:textSize="20sp"/>
            <RadioButton
                android:id="@+id/rbtn_hehua"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="荷花"
                android:textSize="20sp"/>
        </RadioGroup>
    </LinearLayout>
</RadioGroup>

java

package com.example.administrator.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;

import static com.example.administrator.myapplication.R.mipmap.mudan;

public class MainActivity extends AppCompatActivity {
    private ImageView imgHua;
    private RadioGroup rgHua1;
    private RadioButton rbtnMudan;
    private RadioButton rbtnYueji;                                定义组件
    private RadioButton rbtnLanhua;

    private RadioGroup rgHua2;
    private RadioButton rbtnQiangwei;
    private RadioButton rbtnYinghuai;
    private RadioButton rbtnHehua;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imgHua=(ImageView)findViewById(R.id.img_hua);
        rgHua1 = (RadioGroup) findViewById(R.id.rg_hua1);
        rbtnMudan = (RadioButton) findViewById(R.id.rbtn_mudan);
        rbtnYueji = (RadioButton) findViewById(R.id.rbtn_yueji);              获取组件
        rbtnLanhua = (RadioButton) findViewById(R.id.rbtn_lanhua);
        rgHua2 = (RadioGroup) findViewById(R.id.rg_hua2);
        rbtnQiangwei = (RadioButton) findViewById(R.id.rbtn_qiangwei);
        rbtnYinghuai = (RadioButton) findViewById(R.id.rbtn_yinghua);
        rbtnHehua = (RadioButton) findViewById(R.id.rbtn_hehua);


    }


    public void onClick(View V){
        if(rbtnMudan.isChecked()){
            imgHua.setImageResource(R.drawable.mudan);}
            else if(rbtnYueji.isChecked()){
               imgHua.setImageResource(R.drawable.yueji);}
        else if(rbtnLanhua.isChecked()){
            imgHua.setImageResource(R.drawable.lanhua);}                  监听drawable中的图片  但是这个不会。
        else if(rbtnQiangwei.isChecked()){
            imgHua.setImageResource(R.drawable.qiangwei);}
        else if(rbtnYinghuai.isChecked()){
            imgHua.setImageResource(R.drawable.yinghua);}
        else if(rbtnHehua.isChecked()){
            imgHua.setImageResource(R.drawable.hehua);}

        }






    }