Android猜数字大小游戏

功能介绍：该程序能够提示猜大了猜小了，并且对空白输入处理，还对猜测次数限制，提供重置功能。

1、先看界面，一个输入框EditText，两个Button

2、界面设计  activity_main2.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=".Main2Activity">

    <EditText
        android:id="@+id/editText2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="number" />

    <Button
        android:id="@+id/button16"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="提交" />

    <Button
        android:id="@+id/button17"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="重新开始" />
</LinearLayout>

3、逻辑事件控制 Main2Activity.java

package com.example.myapplication;

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

import java.util.Random;

public class Main2Activity extends AppCompatActivity {
    private Button sure=null;
    private Button reset=null;
    int num = 5; //机会次数
    private EditText input_object=null;
    Random random = new Random(10);
    int rand = random.nextInt(10);
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        sure = (Button) findViewById(R.id.button16);
        reset = (Button) findViewById(R.id.button17);
        input_object = (EditText) findViewById(R.id.editText2);

        sure.setOnClickListener(new View.OnClickListener() {//监听确认按钮
            @Override
            public void onClick(View v) {
                String empt=input_object.getText().toString().trim();//提前检测输入是否为空

                if(num>0) {//机会用完就不能猜了
                    if (empt.isEmpty()) {//判断输入是否为空
                        Toast.makeText(Main2Activity.this, "你大爷的！别乱点。。。", Toast.LENGTH_LONG).show();
                    } else {
                        num--;//机会减少
                        int inputnum = (int) Integer.parseInt(input_object.getText().toString());//如果输入为空会产生致命影响
                        if (inputnum == rand) {//猜对
                            Toast.makeText(Main2Activity.this, "牛逼啊大爷！猜对了。。。", Toast.LENGTH_LONG).show();
                        } else if (inputnum < rand) {//猜小
                            Toast.makeText(Main2Activity.this, "猜小了。。。还有" + num+"次机会", Toast.LENGTH_LONG).show();
                        } else {//猜大
                            Toast.makeText(Main2Activity.this, "猜大了。。。还有" + num+"次机会", Toast.LENGTH_LONG).show();
                        }
                    }
                }else{//机会用完提示
                    Toast.makeText(Main2Activity.this, "大爷你玩完了", Toast.LENGTH_LONG).show();
                }
            }
        });

        reset.setOnClickListener(new View.OnClickListener() {//监听重置按钮
            @Override
            public void onClick(View v) {
                rand = random.nextInt(10);//重新产生随机数
                num=5;//机会重置
                Toast.makeText(Main2Activity.this, "随机数重置", Toast.LENGTH_LONG).show();
            }
        });
    }
}