安卓课后作业任务一

①使用滚动字幕的标题“Please choose a flower you like''

网上查找的相关代码

<LinearLayout
    android:orientation ="vertical"
    android:gravity ="center_vertical"
    android:layout_width ="fill_parent"
    android:focusable ="true"
    android:layout_height="wrap_content"
    android:layout_marginTop="@dimen/activity_horizontal_margin">

    <TextView
        android:id="@+id/tittle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:lines="1"
        android:singleLine="true"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:scrollHorizontally="true"
        android:marqueeRepeatLimit="marquee_forever"
        android:ellipsize="marquee"
        android:text="Please choose a flower you like!"
        android:textColor="@android:color/holo_green_light"
        android:textSize="25sp"/>

<ImageView
                android:id="@+id/picture"
                android:layout_width="200dp"
                android:layout_height="200dp"
                android:layout_gravity="center"/>

②RadioGroup和radiobutton创建了两行三列的单选按钮：
            <RadioGroup
            android:id="@+id/kinds"
            android:layout_marginTop="20dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:orientation="vertical">
            <RadioGroup
                android:id="@+id/rg1"
                android:layout_marginTop="20dp"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:orientation="horizontal">
                <RadioButton
                android:id="@+id/hehua"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="@dimen/activity_vertical_margin"
                android:checked="true"
                android:text="荷花"
                android:textSize="20sp"/>
                <RadioButton
                    android:id="@+id/mudanhua"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:checked="true"
                    android:text="牡丹花"
                    android:textSize="20sp"/>
                    <RadioButton
                        android:id="@+id/meihua"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="@dimen/activity_vertical_margin"
                        android:checked="true"
                        android:text="梅花"
                        android:textSize="20sp"/>
                    </RadioGroup>
                <RadioGroup
                    android:id="@+id/rg2"
                    android:layout_marginTop="20dp"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:orientation="horizontal">
                        <RadioButton
                            android:id="@+id/rose"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_marginRight="@dimen/activity_vertical_margin"
                            android:checked="true"
                            android:text="玫瑰"
                            android:textSize="20sp"/>
                        <RadioButton
                            android:id="@+id/mantianx"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_gravity="center"
                            android:checked="true"
                            android:text="满天星"
                            android:textSize="20sp"/>

                        <RadioButton
                            android:id="@+id/yinghua"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_marginLeft="@dimen/activity_vertical_margin"
                            android:checked="true"
                            android:text="樱花"
                            android:textSize="20sp"/>
                </RadioGroup>
        </RadioGroup>

</LinearLayout>
    </LinearLayout>

③最后的任务一相关界面布局：


④对其功能的实现：

rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            //监听事件的建立1


            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                if (rbthehua.isChecked()) {
                    ivpicture.setImageResource(R.drawable.hehua);
                    rg2.clearCheck();//单选选项的实现
                }
                if (rbtmudanhua.isChecked()) {
                    ivpicture.setImageResource(R.drawable.mudanhua);
                    rg2.clearCheck();
                }
                if (rbtmeihua.isChecked()) {
                    ivpicture.setImageResource(R.drawable.meihua);
                    rg2.clearCheck();
                }

            }
        });
        rg2.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            //监听事件的建立2
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                if (rbtrose.isChecked()) {
                    ivpicture.setImageResource(R.drawable.rose);
                    rg1.clearCheck();
                }
                if (rbtmantianx.isChecked()) {
                    ivpicture.setImageResource(R.drawable.mantianx);
                    rg1.clearCheck();
                }
                if (rbtyinghua.isChecked()) {
                    ivpicture.setImageResource(R.drawable.yinghua);
                    rg1.clearCheck();
                }
            }

        });
    }
}
⑤完成