AS第五六周作业

1.

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

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

    @Override
    public void onBackPressed() {
        AlertDialog dialog;
        AlertDialog.Builder builder=new AlertDialog.Builder(this)
                .setTitle("普通对话框")
                .setIcon(R.mipmap.ic_launcher)
                .setMessage("是否确定退出应用：")
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        MainActivity.this.finish();

                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                });
        dialog=builder.create();
        dialog.show();
    }
}

2.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="15dp">

    <RadioGroup
        android:id="@+id/rg_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <RadioButton
            android:id="@+id/rb_1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="男"
            android:checked="true"
            android:textSize="18sp"
            android:textColor="#FF6600"
            android:onClick="click1"/>
        <RadioButton
            android:id="@+id/rb_2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女"
            android:textSize="18sp"
            android:textColor="#FF6600"
            android:onClick="click2"/>
    </RadioGroup>



</RelativeLayout>

package com.example.aaa;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
 
public class MainActivity extends AppCompatActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
    } public void click1(View view){
        Toast.makeText(this,"您选择的是男",Toast.LENGTH_LONG).show();
    }
    public void click2(View view){
        Toast.makeText(this,"您选择的是女",Toast.LENGTH_LONG).show();
    }
}

 

 3.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:background="#00dd00">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:text="1.TextView显示的文本信息"
        android:textSize="30sp"
        android:layout_marginLeft="40dp"
        android:layout_marginRight="20dp"
        android:layout_marginTop="30dp"
        android:textColor="#FF0000"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:text="2.按钮"
        android:textSize="30sp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="25dp"
        android:layout_marginTop="90dp"
        android:textColor="#FF0000"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="60dp"

        android:text="3.编辑框：请输入信息"
        android:textSize="30sp"
        android:layout_marginLeft="25dp"
        android:layout_marginRight="25dp"
        android:layout_marginTop="180dp"
        android:textColor="#FF0000"/>
    <RadioGroup
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:orientation="horizontal">
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="4.男"
            android:textSize="40sp"
            android:textColor="#FF0000"
            android:layout_marginTop="250dp"/>
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女"
            android:textSize="49sp"
            android:textColor="#FF0000"
            android:layout_marginTop="250dp"
            />

    </RadioGroup>
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="电脑"
        android:textColor="#FF0000"
        android:textSize="40sp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginTop="300dp"/>
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="手机"
        android:textColor="#FF0000"
        android:textSize="40sp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginTop="340dp"/>

</RelativeLayout>

4.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    
    <TextView
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:gravity="center"
        android:text="购物商城"
        android:textColor="#CC0000"
        android:textSize="18sp"
        android:background="#33FFFF"></TextView>

    <ListView
        android:id="@+id/lv"
        android:layout_width="match_content"
        android:layout_height="wrap_content"></ListView>
    
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ImageView
        android:layout_width="120dp"
        android:layout_height="90dp"
        android:id="@+id/iv"
        />
    <RelativeLayout
        android:layout_width="wrap_parent"
        android:layout_height="wrap_parent"
        android:layout_toRightOf="@id/iv"
        >
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/title"
            android:layout_marginTop="50dp"
            android:layout_marginLeft="15dp"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="价格:"
            android:id="@+id/jg"
            android:layout_below="@id/title"
            android:layout_marginTop="50dp"
            android:layout_marginLeft="15dp"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/price"
            android:layout_toRightOf="@id/jg"
            android:layout_below="@id/title"
            android:layout_marginTop="50dp"
            android:layout_marginLeft="15dp"/>
    </RelativeLayout>
</LinearLayout>

package com.example.aaa;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.ImageView;



public class Main2Activity extends Activity{
    private ListView mListView;
    private String[] titles={"桌子","苹果","蛋糕","线衣","猕猴桃","围巾"};
    private String[] prices={"1800元","10元/千克","300元","350"+"元","10元/kg","280元"};
    private int[] icons={R.drawable.table,R.drawable.apple,R.drawable.cake,R.drawable.wireclothes,R.drawable.kiwifruit,R.drawable.scarf};
    protected void onCreate(Bundle savedInstancestate){
        super.onCreate(savedInstancestate);
        setContentView(R.layout.activity_main2);
        mListView=(ListView)findViewById(R.id.lv);
        MyBaseAdapter mAdapter =new MyBaseAdapter();
        mListView.setAdapter(mAdapter);
    }
class MyBaseAdapter extends BaseAdapter{
        public int getCount(){
            return titles.length;
        }
        public Object getItem(int position){
            return titles[position];
        }
        public long getItemId(int position) {
        return position;
        }
        public View getView(int position,View convertView,ViewGroup parent){
            View view=View.inflate(Main2Activity.this,R.layout.activity_main3,null);
            TextView title=(TextView)view.findViewById(R.id.title);
            TextView price=(TextView)view.findViewById(R.id.price);
            ImageView iv=(ImageView)view.findViewById(R.id.iv);
            title.setText(titles[position]);
            price.setText(prices[position]);
            iv.setBackgroundResource(icons[position]);
            return view;
        }
}




    }