飞机大战-Activity

来源：互联网发布：javaagent java 编辑：程序博客网时间：2024/04/27 13:27
本项目就一个activity，直接上代码。
package com.example.qgns;import android.app.Activity;import android.content.Context;import android.media.AudioManager;import android.os.Bundle;import android.view.KeyEvent;import android.view.Window;import android.view.WindowManager;import android.widget.Toast;public class MainActivity extends Activity {private long exitTime;private StartView startView;private MyView myView;private EndView endView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);this.requestWindowFeature(Window.FEATURE_NO_TITLE);  //去标题，必须写在<span style="font-family: Arial, Helvetica, sans-serif;">setContentView方法之前</span>this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  //全屏显示WindowManager.LayoutParams.FLAG_FULLSCREEN);this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON,  //保持屏幕常亮WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);startView = new StartView(this);setContentView(startView);}public void toMyView() {  //进入游戏主界面的方法myView = new MyView(this);setContentView(myView);startView = null;}public void toEndView(int sumScore) {  //游戏结束界面的方法endView = new EndView(this, sumScore);setContentView(endView);myView = null;}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {  //监听返回键，实现按两次返回键退出游戏if (keyCode == KeyEvent.KEYCODE_BACK&& event.getAction() == KeyEvent.ACTION_DOWN) {if (System.currentTimeMillis() - exitTime > 2000) {Toast.makeText(this, "再按一次退出", Toast.LENGTH_SHORT).show();exitTime = System.currentTimeMillis();} else {finish();System.exit(0);}}AudioManager audio = (AudioManager) getSystemService(Context.AUDIO_SERVICE);  //媒体音量的控制，控制声音的大小if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) {audio.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_RAISE,AudioManager.FX_FOCUS_NAVIGATION_UP);} else if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {audio.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_LOWER,AudioManager.FX_FOCUS_NAVIGATION_UP);}return true;}}
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