11111111111111111111111111111111111111111111111111111111111111111111111111111
xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Spinner
        android:id="@+id/spinner_1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

11111111111111111111111111111111111111111111111111111111111111111111111111111
java:java:java:java:java:java:java:java:java:java:java:java:java:java:java:


package com.example.spinner_siver;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import java.lang.reflect.Array;

public class MainActivity extends AppCompatActivity {
    Spinner spinner_1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        spinner_1 = findViewById(R.id.spinner_1);

        String[] arr1 = {"全部", "纪录片", "动画片", "音乐", "漫画", "舞蹈"};
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, androidx.appcompat.R.layout.support_simple_spinner_dropdown_item, arr1);
        spinner_1.setAdapter(adapter);

        spinner_1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                TextView text = (TextView)view;
                String str = text.getText().toString();
                Toast.makeText(MainActivity.this, "你选择了"+str, Toast.LENGTH_SHORT).show();
            }

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

            }
        });
    }
}








22222222222222222222222222222222222222222222222222222222222222
xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:xml:

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@drawable/xingkongtwo"
    tools:context=".MainActivity2">

    <TextView
        android:id="@+id/TEXTVIEW_SHOWNAME"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:textStyle="bold"
        android:textColor="#ffffff"
        android:layout_margin="5dp"
        android:textSize="20sp"
        android:text="显示名字"
        />

    <TextView
        android:id="@+id/TEXTVIEW_SHOWBIRTH"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:textStyle="bold"
        android:textColor="#ffffff"
        android:layout_margin="5dp"
        android:textSize="20sp"
        android:text="显示生日"
        />

    <ImageView
        android:id="@+id/IMAGE_STAR"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:src="@drawable/ic_launcher_foreground"
        android:layout_gravity="center"
        />
    <TextView
        android:id="@+id/TEXTVIEW_STAR"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:textStyle="bold"
        android:textColor="#ffffff"
        android:layout_margin="5dp"
        android:textSize="20sp"
        android:text="显示星座内容"
        />

    <Button
        android:id="@+id/BTN_BACK"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="25sp"
        android:textStyle="bold"
        android:text = "返回"
        android:layout_gravity="center"
        android:backgroundTint="#A2C7FF"
        />


</LinearLayout>

22222222222222222222222222222222222222222222222222222222222222
java:java:java:java:java:java:java:java:java:java:java:java:java:java:java:

public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        //定义控件
        TextView Text_showname;
        TextView Text_showbirth;
        ImageView img_star;
        TextView Text_showstar;
        //绑定控件
        Text_showname = findViewById(R.id.TEXTVIEW_SHOWNAME);
        Text_showbirth = findViewById(R.id.TEXTVIEW_SHOWBIRTH);
        img_star = findViewById(R.id.IMAGE_STAR);
        Text_showstar = findViewById(R.id.TEXTVIEW_STAR);
        //接收第一页传递过来的值并显示在对应的文本控件上
        String str_name = getIntent().getStringExtra("input_name");
        Text_showname.setText("您好"+str_name);
        int year = getIntent().getIntExtra("year",0);
        int mon = getIntent().getIntExtra("mon",0);
        int day = getIntent().getIntExtra("day",0);
        Text_showbirth.setText("您的出生日期为:"+year+"年"+mon+"月"+day+"日");
        //星座图片和星座属性选择
        int [] imgarr = {R.drawable.baiyang,R.drawable.jinniu,R.drawable.shuangzi,
                R.drawable.juxie,R.drawable.shizi,R.drawable.chunv,
                R.drawable.tiancheng,R.drawable.tianxie,R.drawable.sheshou,
                R.drawable.mojie,R.drawable.shuiping,R.drawable.shuangyu };
        int [] contentaar = {R.string.白羊座,R.string.金牛座,R.string.双子座,
                                R.string.巨蟹座,R.string.狮子座,R.string.处女座,
                                R.string.天秤座,R.string.天蝎座,R.string.射手座,
                                R.string.摩羯座,R.string.水瓶座,R.string.双鱼座};
        //设置星座
        int index = findstar(mon,day);
        img_star.setImageResource(imgarr[index]);
        Text_showstar.setText(contentaar[index]);

        //通信
        Button btn;
        btn = findViewById(R.id.BTN_BACK);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity2.this,MainActivity.class);
                startActivity(intent);
            }
        });


    }

    private int findstar(int mon, int day)
    {
        int i = 0;
        if(mon == 3 && day >=21 || mon == 4 && day <=19){i = 0;}
        if(mon == 4 && day >=20 || mon == 5 && day <=20){i = 1;}
        if(mon == 5 && day >=21 || mon == 6 && day <=21){i = 2;}
        if(mon == 6 && day >=22 || mon == 7 && day <=22){i = 3;}
        if(mon == 7 && day >=23 || mon == 8 && day <=22){i = 4;}
        if(mon == 8 && day >=23 || mon == 9 && day <=22){i = 5;}
        if(mon == 9 && day >=23 || mon == 10 && day <=23){i = 6;}
        if(mon == 10 && day >=24 || mon == 11 && day <=22){i = 7;}
        if(mon == 11 && day >=23 || mon == 12 && day <=21){i = 8;}
        if(mon == 12 && day >=22 || mon == 1 && day <=19){i = 9;}
        if(mon == 1 && day >=20 || mon == 2 && day <=18){i = 10;}
        if(mon == 2 && day >=19 || mon == 3 && day <=20){i = 11;}
        return i;
    }
}