Android笔记(3)——系统时间的获取与音量控制

来源:互联网 发布:淘宝搜索什么能看片 编辑:程序博客网 时间:2024/03/29 07:53

系统时间的获取很简单,调用Android提供的SimpleDateFormat和Date接口:

完整的java程序(Date.java):

public class VideoOnAndroid extends Activity {public class GetTime{SimpleDateFormat formatter  = new SimpleDateFormat("HHmmss");       Date curDate = new Date(System.currentTimeMillis());String systemcurDate = formatter.format(curDate);int systemTime = Integer.parseInt(systemcurDate);}    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);    }}

音量控制,同样是调用Android提供的AudioManager接口:

public class VideoOnAndroid extends Activity {    private AudioManager mAudioManager;    private int v = 0;    TextView volume;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        volume = (TextView)findViewById(R.id.volume);        mAudioManager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);    }@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event){ //按键控制音量加大if(keyCode == KeyEvent.KEYCODE_DPAD_UP)        {mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_RAISE,AudioManager.FX_FOCUS_NAVIGATION_UP);v = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);volume.setText("音量:"+v);            return true;        }//按键控制音量减小if(keyCode == KeyEvent.KEYCODE_DPAD_DOWN)        {mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_LOWER,AudioManager.FX_FOCUS_NAVIGATION_UP);v = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);volume.setText("音量:"+v);            return true;        }return super.onKeyDown(keyCode, event);}}


原创粉丝点击