随机报价生成器的简单应用程序,请帮忙:)

时间:2013-03-23 17:50:21

标签: java eclipse random generator

感谢您提供的任何意见。我是编码新手,并设法创建一个文本播放应用程序(以随机大小和颜色显示一行文本)。我试图创建一个随机引用应用程序,并有两个按钮。我想用它们从两个单独的列表中选择一个引用。我该怎么做?我拥有的另一个按钮体验是我制作的另一个初学者应用程序,它在计数器中添加或删除了一个数字:

package com.example;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class FOREVERAPHONE extends Activity {
    int counter;
    Button add, sub;
    TextView display;

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

        counter = 0;
        add = (Button) findViewById(R.id.bAdd);
        sub = (Button) findViewById(R.id.bSub);
        display = (TextView) findViewById(R.id.tvDisplay);
        add.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                counter += 1;
                display.setText("counter");
            }
        });
        add.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                counter -= 1;
                display.setText("counter");
            }
        });
    }

}

请帮忙!我花了几个小时试图弄清楚它!非常感谢你。

1 个答案:

答案 0 :(得分:0)

有一个名为Random的类,可用于模拟随机数的生成。

试试这个:

package com.example;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Random;
import java.util.ArrayList<E>;

public class FOREVERAPHONE extends Activity {
    int selector;
    Button add, sub;
    TextView display;
    // List of random quotes
    ArrayList<String> listOfRandomQuotes;

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

        listOfRandomQuotes = new ArrayList<String>();
        listOfRandomQuotes.add("A penny saved is a penny earned.");
        listOfRandomQuotes.add("You must be the change you wish to see in the world.");
        listOfRandomQuotes.add("I have decided to stick with love. Hate is too great a burden to bear.");
        listOfRandomQuotes.add("By failing to prepare, you are preparing to fail.");

        add = (Button) findViewById(R.id.bAdd);
        sub = (Button) findViewById(R.id.bSub);
        display = (TextView) findViewById(R.id.tvDisplay);
        add.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Random randomNumber = new Random();
                selector = randomNumber.nexInt(4);
                display.setText(listOfRandomQuotes.get(selector));
            }
        });
    }

}

每次点击“添加”按钮时,都应该选择一个随机引号并显示它。

注意:请确保不要多次为视图设置OnClickListener!

希望这有帮助!