【Android开发小项目】2、猜数字游戏 You win or you suck？

文章目录

Android开发小项目_2、猜数字游戏

界面Preview

实现方式：拖动Platte

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对每个组件进行命名

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Java活动代码

package com.example.guess_num;

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

import java.util.Random;

public class MainActivity extends AppCompatActivity {
//    private int rand1;
//    private int rand2;
    private int points;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //when app loads up
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        pickrandom();
    }
    private void pickrandom(){
        //Create random numbers
        Random randy = new Random();
        int rand1 = randy.nextInt(10);
        int rand2 = 0;
        rand1 = randy.nextInt(10);
        while (true){
            rand2 = randy.nextInt(10);
            if(rand2 != rand1) break;
        }
        rand2 = randy.nextInt(10);

        Button lbutt =(Button) findViewById(R.id.button_1);
        lbutt.setText(Integer.toString(rand1));
        Button rbutt =(Button) findViewById(R.id.button_2);
        rbutt.setText(Integer.toString(rand2));
    }

    public void rightButton(View view) {
        Button lbutt = (Button) findViewById(R.id.button_1);
        String ltext = lbutt.getText().toString();
        int rand1 = Integer.parseInt(ltext);    //"3" -> 3
        Button rbutt = (Button) findViewById(R.id.button_2);
        String rtext = rbutt.getText().toString();
        int rand2 = Integer.parseInt(rtext);    //"3" -> 3
        if(rand1 <= rand2){
            //correct
            points++;
            Toast.makeText(this,"Great Job!",Toast.LENGTH_SHORT).show();
        }else{
            //incorrect
            points--;
            Toast.makeText(this,"You Suck",Toast.LENGTH_SHORT).show();
        }
        //update display of points
        TextView tv = (TextView) findViewById(R.id.bottom_text);
        tv.setText("Points:" + points);

        pickrandom();
    }

    public void leftButton(View view) {
        Button lbutt = (Button) findViewById(R.id.button_1);
        String ltext = lbutt.getText().toString();
        int rand1 = Integer.parseInt(ltext);    //"3" -> 3
        Button rbutt = (Button) findViewById(R.id.button_2);
        String rtext = rbutt.getText().toString();
        int rand2 = Integer.parseInt(rtext);    //"3" -> 3
        if(rand1 <= rand2){
            //correct
            points++;
            Toast.makeText(this,"Great Job!",Toast.LENGTH_SHORT).show();
        }else{
            //incorrect
            points--;
            Toast.makeText(this,"You Suck",Toast.LENGTH_SHORT).show();
        }
        //update display of points
        TextView tv = (TextView) findViewById(R.id.bottom_text);
        tv.setText("Points:" + points);

        pickrandom();
    }
}

注：部分代码解释

parseInt方法简介

新建Wiget对象 深入理解findViewById（）

TextView tv = (TextView) findViewById(R.id.bottom_text);
posted @ 2019-05-30 09:14  嗨Sirius  阅读(107)  评论(0)  编辑  收藏  举报