android多活动练习--人品计算器

效果图如下：

第二个页面：

显示结果和姓名、性别有关，代码如下：

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="姓名" />

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

        <RadioButton
            android:id="@+id/rb1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="男" />

        <RadioButton
            android:id="@+id/rb2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女" />

        <RadioButton
            android:id="@+id/rb3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="其他" />
    </RadioGroup>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="btnClick"
        android:text="计算" />

</LinearLayout>

MainActivity.java：

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private EditText et_name;
    private RadioGroup rg;
    private RadioButton rb1;
    private RadioButton rb2;
    private RadioButton rb3;

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

        initView();

    }

    public void initView() {
        et_name = findViewById(R.id.name);
        rg = findViewById(R.id.rg);
        rb1 = findViewById(R.id.rb1);
        rb1 = findViewById(R.id.rb3);
        rb1 = findViewById(R.id.rb1);
    }

    public void btnClick(View view) {
        //获取用户名
        String name = et_name.getText().toString().trim();
        //判断是否为空
        if (TextUtils.isEmpty(name)) {
            Toast.makeText(getApplicationContext(), "请输入姓名", Toast.LENGTH_SHORT).show();
        } else {
            //判断性别
            int radioButtonId = rg.getCheckedRadioButtonId();
            int sex = 0;//sex代表性别
            switch (radioButtonId) {
                case R.id.rb1://代表男
                    sex = 1;
                    break;
                case R.id.rb2://代表女
                    sex = 2;
                    break;
                case R.id.rb3://代表其他
                    sex = 3;
                    break;
            }
            if (sex == 0) {
                Toast.makeText(getApplicationContext(), "请输入性别", Toast.LENGTH_SHORT).show();

            } else {
                //跳转页面
                Intent intent = new Intent(MainActivity.this, ResultActivity.class);
                intent.putExtra("name", name);
                intent.putExtra("sex", sex);
                startActivity(intent);
            }
        }
    }
}

activity_result.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ResultActivity"
    android:orientation="vertical">
    <TextView
        android:id="@+id/rName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="张三"/>
    <TextView
        android:id="@+id/rSex"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="男"/>
    <TextView
        android:id="@+id/result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="您的人品很好"/>

</LinearLayout>

ResulrActivity.java:

import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import java.util.Random;

public class ResultActivity extends AppCompatActivity {

    private TextView rName;
    private TextView rSex;
    private TextView result;
    private byte[] bytes;

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

        rName = findViewById(R.id.rName);
        rSex = findViewById(R.id.rSex);
        result = findViewById(R.id.result);

        //获取传递来的数据
        Intent intent = getIntent();
        String name = intent.getStringExtra("name");
        int sex = intent.getIntExtra("sex", 0);
        rName.setText(name);
        String str = name;
        switch (sex) {
            case 1:
                rSex.setText("男");
                str = name + "男";
                break;
            case 2:
                rSex.setText("女");
                str = name + "女";
                break;
            case 3:
                rSex.setText("其他");
                str = name + "其他";
                break;
        }
        //计算结果使用随机数
        bytes = str.getBytes();
        int totle = 0;
        for (byte b : bytes) {
            int number = b & 0xff;//b&1111 1111
            totle += number;

        }
        int score = Math.abs(totle) % 100;
        if (score > 90) {
            result.setText("你的人品不错");
        } else if (score > 90) {
            result.setText("你的人品还行");
        } else if (score > 70) {
            result.setText("你的人品刚及格");
        } else if (score > 50) {
            result.setText("你快被世界抛弃了");
        } else if (score > 40) {
            result.setText("虽然被抛弃了，你要活着，");
        }//重点不是数据，然是页面间的传值


    }
}

这就完成了，只适合小白练习而已，做个小笔记。