APK开发示例---比赛简易计分器

分手后的思念是犯贱 2022-04-12 11:27 230阅读 0赞

最近学习Android程序开发。突发奇想，琢磨了一下自身的定位：我应该是会Android开发的人里打羽毛球比较好的，会打羽毛球人里Android程序写得比较好的。  
　　比赛时，有时候记分不太方便，就自己边学边做，写了个极简单的“比赛简易计分器”程序。没有什么难度，把代码贴一下，大家自己看。  
  
一、效果图  
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\[img\]http://dl2.iteye.com/upload/attachment/0113/1762/1c60ef19-237e-34aa-bb04-53a5c492fa61.png\[/img\]  
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二、界面代码

三、程序代码

package com.wallimn.iteye.ymq;
    
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.KeyEvent;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.widget.TextView;
    import android.widget.Toast;
    
    public class MainActivity extends AppCompatActivity {
       
    
        private TextView scoreA;
        private TextView scoreB;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
       
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            scoreA = (TextView)this.findViewById(R.id.tvScoreA);
            scoreB = (TextView)this.findViewById(R.id.tvScoreB);
    
            scoreA.setText("00");
            scoreB.setText("00");
        }
    
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
       
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.menu_main, menu);
            return true;
        }
    
        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
       
            // Handle action bar item clicks here. The action bar will
            // automatically handle clicks on the Home/Up button, so long
            // as you specify a parent activity in AndroidManifest.xml.
            int id = item.getItemId();
    
            //noinspection SimplifiableIfStatement
            if (id == R.id.action_settings) {
       
                return true;
            }
    
            return super.onOptionsItemSelected(item);
        }
    
        private void NumberAdjust(TextView tv,int deta){
       
            String num = tv.getText().toString();
            int number = Integer.parseInt(num);
            if(number+deta<0)return;
            tv.setText(String.format("%02d", number+deta));
        }
    
        private long exitTime=0;
        @Override
        public boolean onKeyDown(int keyCode, KeyEvent event) {
       
    
            if(event.getAction()==KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_BACK){
       
                if(System.currentTimeMillis()-exitTime>5000){
       
                    Toast.makeText(this,"再按一次返回键程序！",Toast.LENGTH_LONG).show();
                    exitTime = System.currentTimeMillis();
                }
                else{
       
                    this.finish();
                    System.exit(0);
                }
                return true;
            }
            return super.onKeyDown(keyCode, event);
        }
    
        public void ScoreAPlus(View source){
       
            this.NumberAdjust(scoreA, 1);
        }
        public void ScoreAMinus(View source){
       
            this.NumberAdjust(scoreA, -1);
        }
        public void ScoreBPlus(View source){
       
            this.NumberAdjust(scoreB, 1);
        }
        public void ScoreBMinus(View source){
       
            this.NumberAdjust(scoreB,-1);
        }
    }

apk程序下载，请猛戳附件(ymq-release.rar)。源码下载，请猛戳附件(ymq-src.rar)。  
  
  
四、改进  
　　改成横屏显示，看起来舒服一些，增加了菜单，带了重置、退出功能。  
\[align=center\]  
\[img\]http://dl2.iteye.com/upload/attachment/0113/1958/5c025469-d882-3f21-8eaa-750572519f59.png\[/img\]  
\[/align\]