Android 使用BaseAdapter制作ListView和实现注册界面

使用BaseAdapter制作图2的ListView

• 效果图
  

MainActivity.java

package com.example.listview;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private String[] titles = {"毡帽系列","蜗牛系列","小蜜蜂系列",
            "毡帽系列","蜗牛系列","小蜜蜂系列"};

    private String[] descs = {"此系列服装有点cute,像不像小车夫。",
            "宝宝变成了蜗牛,爬啊爬啊","小蜜蜂,啪哨,飞到西,飞到东",
            "此系列服装有点cute,像不像小车夫。",
            "宝宝变成了蜗牛,爬啊爬啊","小蜜蜂,啪哨,飞到西,飞到东"};
    private int[] ivs = {R.drawable.a,R.drawable.b,R.drawable.c,
            R.drawable.a,R.drawable.b,R.drawable.c};
    private ListView mlistView;

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

        mlistView = (ListView)findViewById(R.id.mlistView);
        MyBaseAdapter myBaseAdapter = new MyBaseAdapter();
        mlistView.setAdapter(myBaseAdapter);
    }

    class MyBaseAdapter extends BaseAdapter{
        @Override
        public int getCount() {
            return titles.length;
        }

        @Override
        public Object getItem(int i) {
            return titles[i];
        }

        @Override
        public long getItemId(int i) {
            return i;
        }

        @Override
        public View getView(int i, View convertview, ViewGroup viewGroup) {
            //加载布局文件
            View view = View.inflate(MainActivity.this,R.layout.list_item,null);
            TextView title = (TextView) view.findViewById(R.id.title);
            TextView desc = (TextView) view.findViewById(R.id.desc);
            ImageView iv = (ImageView) view.findViewById(R.id.iv);
            title.setText(titles[i]);
            desc.setText(descs[i]);
            iv.setBackgroundResource(ivs[i]);
            return view;
        }
    }

}

activity_main.xml

<androidx.constraintlayout.widget.ConstraintLayout 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">

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <ListView
            android:id="@+id/mlistView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:divider="#cbcbcb"
            android:dividerHeight="2px">
        ListView>

    LinearLayout>

androidx.constraintlayout.widget.ConstraintLayout>

list_item.xml

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/iv"
            android:layout_marginLeft="10dp"
            android:layout_width="120dp"
            android:layout_height="match_parent"
            />

        <LinearLayout
            android:layout_marginRight="10dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:id="@+id/title"
                android:text="毡帽系列"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="25sp" />

            <TextView
                android:id="@+id/desc"
                android:text="此系列服装有点cute,像不像小车夫。"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp" />

            <ImageView
                android:layout_gravity="right"
                android:id="@+id/icon"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:src="@drawable/t"/>
        LinearLayout>
    LinearLayout>

androidx.constraintlayout.widget.ConstraintLayout>

实现注册界面

MainActivity.java

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {

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

    private EditText name;
    private EditText pwd;
    private EditText pwd2;
    private RadioGroup rdg;
    private String gender = "男";
    private String hobbys;
    private CheckBox like_swimming;
    private CheckBox like_music;
    private CheckBox like_book;
    Spinner sp;
    private String[] starArray = {"小学", "初中", "中专/高中", "专科", "本科", "硕士", "博士"};
    private String education;

    // 实现注册按钮点击事件
    public void click(View view) {
        name = (EditText) findViewById(R.id.name);
        pwd = (EditText) findViewById(R.id.pwd);
        pwd2 = (EditText) findViewById(R.id.pwd2);
        rdg = (RadioGroup) findViewById(R.id.rdg);
        hobbys = new String();
        like_swimming = (CheckBox) findViewById(R.id.like_swimming);
        like_music = (CheckBox) findViewById(R.id.like_music);
        like_book = (CheckBox) findViewById(R.id.like_book);

        // 设置喜欢的监听事件
        like_swimming.setOnCheckedChangeListener(this);
        like_music.setOnCheckedChangeListener(this);
        like_book.setOnCheckedChangeListener(this);

        //从布局文件中获取名叫sp_dialog的下拉框
        sp = findViewById(R.id.education);
        //设置下拉框默认的显示第6项
        sp.setSelection(5);
        //给下拉框设置选择监听器，一旦用户选中某一项，就触发监听器的onItemSelected方法
        sp.setOnItemSelectedListener(new MySelectedListener());

        // 设置性别点击事件的监听,获取性别数据
        rdg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int checkId) {
                if (checkId != R.id.rbtn) {
                    gender = "女";
                } else {
                    gender = "男";
                }
            }
        });

        String data = "用户名: " + name.getText().toString() + " 密码：" + pwd.getText().toString()
                + " 确认密码：" + pwd2.getText().toString() + " 性别: " + gender +
                " 学历 " + education + " 爱好 " + hobbys;
        Toast.makeText(MainActivity.this, data, Toast.LENGTH_LONG).show();
    }

    //爱好 多选框的点击事件
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        String motion = buttonView.getText().toString();
        if (isChecked) {
            if (!hobbys.contains(motion)) {
                hobbys = hobbys + motion;
            }
        } else {
            if (hobbys.contains(motion)) {
                hobbys = hobbys.replace(motion, "");
            }
        }
    }

    // 学历 下拉框的监听事件
    class MySelectedListener implements AdapterView.OnItemSelectedListener {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
            education = starArray[i];
        }

        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {

        }
    }
}

activity_main.xml

<androidx.constraintlayout.widget.ConstraintLayout 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">

    <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="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginTop="70dp"
            android:text="注册"
            android:textSize="40dp" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="30dp">

            <EditText
                android:id="@+id/name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:layout_weight="1"
                android:textSize="30dp"
                android:hint="用户名" />
        LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <EditText
                android:id="@+id/pwd"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:layout_weight="1"
                android:textSize="30dp"
                android:hint="密码" />
        LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <EditText
                android:id="@+id/pwd2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:layout_weight="1"
                android:textSize="30dp"
                android:hint="确认密码" />
        LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="10dp"
                android:text="性别"
                android:textSize="30dp" />

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

                <RadioButton
                    android:id="@+id/rbtn"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:checked="true"
                    android:textSize="30dp"
                    android:text="男" />

                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textSize="30dp"
                    android:text="女" />
            RadioGroup>
        LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="6dp"
                android:text="学历"
                android:textSize="30dp" />

            <Spinner
                android:id="@+id/education"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginTop="6dp"
                android:entries="@array/education">
            Spinner>
        LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginTop="6dp"
                android:text="爱好"
                android:textSize="30dp" />

            <CheckBox
                android:id="@+id/like_swimming"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="20dp"
                android:layout_marginTop="6dp"
                android:textSize="30dp"
                android:text="游泳" />

            <CheckBox
                android:id="@+id/like_music"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="20dp"
                android:layout_marginTop="6dp"
                android:textSize="30dp"
                android:text="音乐" />

            <CheckBox
                android:id="@+id/like_book"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="20dp"
                android:layout_marginTop="6dp"
                android:textSize="30dp"
                android:text="读书" />
        LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center">
            <Button
                android:background="#708090"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="30dp"
                android:text="注册"
                android:onClick="click"/>
        LinearLayout>

    LinearLayout>

androidx.constraintlayout.widget.ConstraintLayout>