安卓作业

 第一个作业：图片选择器
在Textview中添加了一段关于跑马灯效果的代码：
 android:ellipsize="marquee"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:marqueeRepeatLimit="marquee_forever"
    android:scrollHorizontally="true"
        android:singleLine="true"
    android:scrollbars="horizontal

package com.example.zhoushasha.myapplication6;

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 android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    //获取控件
    private ImageView page;
    private RadioGroup rg1;
    private RadioGroup rg2;
    private RadioButton rb5;
    private RadioButton rb6;
    private RadioButton rb7;
    private RadioButton rb8;
    private RadioButton rb9;
    private RadioButton rb10;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //
        page = (ImageView) findViewById(R.id.page);
        rg1 = (RadioGroup) findViewById(R.id.rg1);
        rg2 = (RadioGroup) findViewById(R.id.rg2);
        rb5 = (RadioButton) findViewById(R.id.rb5);
        rb6 = (RadioButton) findViewById(R.id.rb6);
        rb7 = (RadioButton) findViewById(R.id.rb7);
        rb8 = (RadioButton) findViewById(R.id.rb8);
        rb9 = (RadioButton) findViewById(R.id.rb9);
        rb10 = (RadioButton) findViewById(R.id.rb10);
        //用setOnCheckedChangeListener添加监听对象
        rg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {   //监听rgrg RadioGroup组
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                if (rb8.isChecked()) {
                    page.setImageResource(R.drawable.map);//用于显示自己添加的图片
                    rg2.clearCheck();// 用于显示单选，不出现多选的情况
                }
                if (rb9.isChecked()) {
                    page.setImageResource(R.drawable.map1);
                    rg2.clearCheck();
                }
                if (rb10.isChecked()) {
                    page.setImageResource(R.drawable.map2);
                    rg2.clearCheck();
                }

            }
        });
        rg2.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {   //监听rgrg RadioGroup组
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                if (rb5.isChecked()) {
                    page.setImageResource(R.drawable.map3);//用于显示自己添加的图片
                    rg1.clearCheck();// ，用于显示单选，不出现多选的情况
                }
                if (rb6.isChecked()) {
                    page.setImageResource(R.drawable.map4);
                    rg1.clearCheck();
                }
                if (rb7.isChecked()) {
                    page.setImageResource(R.drawable.map5);
                    rg1.clearCheck();
                }

            }
        });
    }
}

第一个布局文件刚开始使用图形化界面布局，后来就有点搞乱了，又使用直接写代码的方法又改了一下
    

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout   xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    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.zhoushasha.myapplication6.MainActivity"
    android:weightSum="1"
    android:baselineAligned="false"
    android:orientation="vertical">

    <TextView
       android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="please you choose a flower you like:"
        android:id="@+id/text"
        android:layout_gravity="center"
        android:textSize="30dp"
        android:ellipsize="marquee"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:marqueeRepeatLimit="marquee_forever"
    android:scrollHorizontally="true"
        android:singleLine="true"
    android:scrollbars="horizontal" />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:textSize="100sp"
        android:id="@+id/page"
        android:scaleType="center"
        android:adjustViewBounds="false"
        android:cropToPadding="false"
        android:src="@mipmap/map"
        android:layout_marginTop="50dp" />

 <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="75dp">
     //使用两个RadioGroup可以实现两行，三列的布局

        <RadioGroup
            android:layout_width="match_parent"
            android:layout_height="58dp"
            android:id="@+id/rg1"
            android:orientation="horizontal" >

            <RadioButton
                android:text="梅花"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/rb8"
                android:textSize="25dp" />

            <RadioButton
                android:text="石楠花"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/rb10"
                android:textSize="25dp" />

            <RadioButton
                android:text="象牙花"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/rb9"
                android:textSize="25dp"
                android:layout_weight="1" />
        </RadioGroup>
   </LinearLayout>
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0.10">
    <RadioGroup
        android:layout_width="match_parent"
        android:id="@+id/rg2"
        android:orientation="horizontal"
        android:layout_height="wrap_content"
        android:layout_weight="0.90" />

        <RadioButton
            android:text="牡丹花"
            android:layout_width="wrap_content"
            android:id="@+id/rb7"
            android:textSize="25dp"
            android:layout_height="wrap_content" />

        <RadioButton
            android:id="@+id/rb5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="绣球花"
        android:textSize="25dp"/>

        <RadioButton
            android:text="玉兰花"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/rb6"
            android:textSize="25dp"/>
    </LinearLayout>
   </LinearLayout>

 第二个作业

1.使图片随着鼠标移动，显示坐标信息

2.点击按钮，给出提示信息退出

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    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.zhoushasha.myapplication7.MainActivity"
    android:weightSum="1">
//简单的设置两个控件，以及几个属性
 <ImageView
     android:id="@+id/mp"
     android:layout_width="96dp"
     android:layout_height="wrap_content"
     android:layout_alignParentTop="true"
     app:srcCompat="@drawable/map"
     android:layout_alignParentLeft="true"
     android:layout_alignParentStart="true"
     android:layout_weight="0.14" />
 <LinearLayout
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"/>
 <Button
    android:id="@+id/bt"
    android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="退出"
   android:layout_gravity="bottom"
 android:textSize="30dp" />
</LinearLayout>

package com.example.zhoushasha.myapplication7;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    //获取控件
    private ImageView mp;
    private Button bt;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mp = (ImageView) findViewById(R.id.mp);
        bt = (Button) findViewById(R.id.bt);
        //用setOnClickListenne添加监控对象bt
      bt.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
              Toast.makeText(MainActivity.this, "再按一次退出按钮",
                      Toast.LENGTH_LONG).show();
              bt.setOnClickListener(new View.OnClickListener() {
                  @Override
                  public void onClick(View v) {
                      MainActivity.this.finish();
                  }
              });
          }
      });
    }

        public boolean onTouchEvent(MotionEvent event) {
            //区分触屏事件的方式
            if (event.getAction() ==MotionEvent.ACTION_MOVE) {
                String pos="";
                float x =event.getX();//得到x轴的坐标
                float y =event.getY();//得到Y轴的坐标
                 pos ="X坐标："+x+",Y坐标"+y;
                mp.setX(x-200);
                mp.setY(y-400);
                Toast.makeText(this,pos,Toast.LENGTH_LONG).show();
            }
            return super.onTouchEvent(event);
        }

 }

        

以上部分方法，和代码使用来自于百度。