安卓作业

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivityJun" >
    <LinearLayout
        android:layout_marginTop="@dimen/activity_horizontal_margin"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"        >
        <RadioGroup
            android:id="@+id/jun"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="5"
            android:orientation="horizontal">

            <RadioButton
                android:id="@+id/xunyicao"
                android:text="薰衣草"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />

            <RadioButton
                android:id="@+id/bianhua"
                android:text="彼岸花"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />

            <RadioButton
                android:id="@+id/yingsu"
                android:text="罂粟"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />
        </RadioGroup>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <RadioButton
            android:id="@+id/tianshanxuelian"
            android:text="天山雪莲"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <RadioButton
            android:id="@+id/tiantangniao"
            android:text="天堂鸟"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <RadioButton
            android:id="@+id/yujinxiang"
            android:text="郁金香"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>
    <TextView
        android:id="@+id/textView_paomadeng"
        android:layout_alignParentBottom="true"
        android:textColor="#6699ff"
        android:singleLine="true"
        android:marqueeRepeatLimit="marquee_forever"
        android:ellipsize="marquee"
        android:background="#ffffff"
        android:textSize="20dp"
        android:focusableInTouchMode="true"
        android:scrollHorizontally="true"
        android:layout_width="fill_parent"
        android:text="Pleasr choose a flower you like"
        android:layout_height="wrap_content" />

</RelativeLayout>
接下来是MainActivity.java

package com.example.my.myapplicationflower;

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;

public class MainActivity extends AppCompatActivity {
    private RadioButton xunyicao;
    private RadioButton bianhua;
    private RadioButton yingsu;
    private RadioButton tianshanxuelian;
    private RadioGroup jun;
    private RadioButton tiantangniao;
    private RadioButton yujinxiang;
    private ImageView imageView;
    @Override

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        xunyicao = (RadioButton) findViewById(R.id.taohua);
        bianhua = (RadioButton) findViewById(R.id.lanhua);
        yingsu = (RadioButton) findViewById(R.id.lianhua);

        tianshanxuelian = (RadioButton) findViewById(R.id.yinghua);
        tiantangniao = (RadioButton) findViewById(R.id.guihua);
        yujinxiang = (RadioButton) findViewById(R.id.meihua);
        jun = (RadioGroup) findViewById(R.id.zu1);
        imageView = (ImageView) findViewById(R.id.imageView);
        xunyicao.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (xunyicao.isChecked()) {
                    imageView.setImageResource(R.drawable.taohua);

                }
            }
        });
        bianhua.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (bianhua.isChecked()) {
                    imageView.setImageResource(R.drawable.lanhua);
                }
            }
        });
        yingsu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (yingsu.isChecked()) {
                    imageView.setImageResource(R.drawable.lianhua);
                }
            }
        });

        tianshanxuelian.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (tianshanxuelian.isChecked()) {
                    imageView.setImageResource(R.drawable.yinghua);
                }
            }
        });
        tiantangniao.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (tiantangniao.isChecked()) {
                    imageView.setImageResource(R.drawable.guihua);
                }
            }
        });
        yujinxiang.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (yujinxiang.isChecked()) {
                    imageView.setImageResource(R.drawable.meihua);
                }
            }
        });
    }
}