拼图小游戏"ST--拼图"开发篇之开始界面的功能实现
开始Start界面
开始界面只使用了两个控件,一个是ImageView,另一个是Button按钮
两个控件都有onclick事件
Button的点击事件
<span style="font-size:18px;">public void onclick(View v) {
switch (v.getId()) {
case R.id.start_bt:
Intent intent = new Intent(StratActivity.this, MainActivity.class);
startActivity(intent);
break;
}
}
</span>
接着就是写背景音乐服务
<span style="font-size:18px;">public class MyMusicService extends Service {
// 声明操作媒体的
public MediaPlayer mediaPlayer;
// 记录播放的位置
private int pos = 0;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
// 绑定时进行播放
System.out.println("AAAAAAAAAAAA");
playMusic();
return new MyBinder();
}
public class MyBinder extends Binder {
public MyMusicService getMyMusicService() {
return MyMusicService.this;
}
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
if (mediaPlayer == null) {
mediaPlayer = MediaPlayer.create(MyMusicService.this,
R.raw.background);
// 设置单曲循环
mediaPlayer.setLooping(true);
}
// 播放完毕 进行监听回调
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
// 释放资源
mediaPlayer.release();
}
});
}</span>
然后就是来控制声音的暂停,播放,停止
<span style="font-size:18px;">// 播放音乐
public void playMusic() {
// 如果mediaPlayer不为空 并且不是正在播放
if (mediaPlayer != null && !mediaPlayer.isPlaying()) {
try {
if (pos != 0) {
mediaPlayer.seekTo(pos);// 根据指定的位置进行播放
mediaPlayer.start();
} else {
mediaPlayer.stop();
mediaPlayer.prepare();// 启动之前必须 prepare
mediaPlayer.start();
}
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
// 暂停音乐
public void pasueMusic() {
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
pos = mediaPlayer.getCurrentPosition();
mediaPlayer.pause();
}
}
// 停止音乐
public void stopMusic() {
if (mediaPlayer != null) {
mediaPlayer.stop();// 停止
mediaPlayer.reset();// 资源重置
}
}
@Override
public boolean onUnbind(Intent intent) {
// TODO Auto-generated method stub
return super.onUnbind(intent);
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
}</span>
完成声音的控制之后,便可以在开始界面调用该方法来控制音乐
public class MyServiceConn implements ServiceConnection {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub
MyBinder myBinder = (MyBinder) service;
musicService = myBinder.getMyMusicService();
}
@Override
public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub
conn = null;
}
}
ImageView的点击事件
<span style="font-size:18px;"> public void onclickImage(View v) {
if (flag==0) {
if (musicService == null) {
Intent intent1 = new Intent(StratActivity.this,
MyMusicService.class);
System.out.println("ass");
bindService(intent1, conn, Context.BIND_AUTO_CREATE);
} else {
musicService.playMusic();
}
flag=1;
iv1.setImageResource(R.drawable.music);
} else {
if (musicService != null) {
System.out.println("bbb");
musicService.stopMusic();
musicService = null;
unbindService(conn);
}
flag=0;
iv1.setImageResource(R.drawable.music1);
}
}</span>
其中
<span style="font-size:18px;">R.drawable.music1 </span><pre name="code" class="java"><pre name="code" class="java"><span style="font-size:18px;">R.drawable.music</span>是两张相同的png图片,背景色透明,颜色不同,来区分ImageView是否点击
其实两个点击事件可以写到同一个方法内,由于背景音乐是我后期才添加的,所以没有去更改
因为背景音乐暂停之后可以重新从头开始,所以只调用
<span style="font-size:18px;">MyMusicService</span>的stop和start
onCreate方法获取布局,并且判断开始的时候是否音乐开启,没有开启的话开启背景音乐,即背景音乐默认是开启状态
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.start);
am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
am.adjustStreamVolume(AudioManager.STREAM_MUSIC,
AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);
iv1=(ImageView) findViewById(R.id.start_iv1);
conn = new MyServiceConn();
if (musicService == null) {
Intent intent1 = new Intent(StratActivity.this,
MyMusicService.class);
bindService(intent1, conn, Context.BIND_AUTO_CREATE);
} else {
musicService.playMusic();
}
其中
<span style="font-size:18px;">am = (AudioManager) getSystemService(Context.AUDIO_SERVICE); am.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);</span>是用来控制调用音量键控制背景音乐大小
更多大家可以查看一下点击打开链接
双击退出程序,这个大家可以记一下,在很多地方都可以用到
// 双击返回键退出程序
/**
* 菜单、返回键响应
*/
@Override
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
exitBy2Click(); // 调用双击退出函数
break;
case KeyEvent.KEYCODE_VOLUME_DOWN:
am.adjustStreamVolume(AudioManager.STREAM_MUSIC,
AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI);
break;
case KeyEvent.KEYCODE_VOLUME_UP:
am.adjustStreamVolume(AudioManager.STREAM_MUSIC,
AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);
break;
case KeyEvent.KEYCODE_VOLUME_MUTE:
am.setStreamMute(AudioManager.STREAM_MUSIC, true);
break;
default:
break;
}
return false;
}
/**
* 双击退出函数
*/
private void exitBy2Click() {
Timer tExit = null;
if (isExit == false) {
isExit = true; // 准备退出
Toast.makeText(this, "再按一次退出程序", Toast.LENGTH_SHORT).show();
tExit = new Timer();
tExit.schedule(new TimerTask() {
@Override
public void run() {
isExit = false; // 取消退出
}
}, 2000); // 如果2秒钟内没有按下返回键，则启动定时器取消掉刚才执行的任务
} else {
finish();
System.exit(0);
}
}
背景音乐开启状态
背景音乐开启状态
Main 界面功能的实现
<span style="font-size:18px;">public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onclick(View v) {
switch (v.getId()) {
case R.id.main_iv1:
Intent intent1 = new Intent(MainActivity.this, EasyActivity.class);
startActivity(intent1);
break;
case R.id.main_iv2:
Intent intent2 = new Intent(MainActivity.this, SimpleActivity.class);
startActivity(intent2);
break;
case R.id.main_iv3:
Intent intent3 = new Intent(MainActivity.this, HardActivity.class);
startActivity(intent3);
break;
default:
break;
}
}
}</span>