public class MainActivity extends Activity {
private Handler mHandler01 = new Handler();
private Handler mHandler02 = new Handler();
/* 上一次User有动作的Time Stamp */
private Date lastUpdateTime;
/* 计算User有几秒没有动作的 */
private long timePeriod;
/* 静止超过N秒将自动进入屏保 */
private float mHoldStillTime = 10;
/*标识当前是否进入了屏保*/
private boolean isRunScreenSaver;
/*时间间隔*/
private long intervalScreenSaver = 1000;
private long intervalKeypadeSaver = 1000;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
((Button)findViewById(R.id.start_screen_Saver)).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent mService = new Intent(MainActivity.this, ScreenService.class);
mService.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startService(mService);
}
});
/* 初始取得User可触碰屏幕的时间 */
lastUpdateTime = new Date(System.currentTimeMillis());
}
/**
* 计时线程
*/
private Runnable mTask01 = new Runnable() {
@Override
public void run() {
Date timeNow = new Date(System.currentTimeMillis());
/* 计算User静止不动作的时间间距 */
/**当前的系统时间 - 上次触摸屏幕的时间 = 静止不动的时间**/
timePeriod = (long) timeNow.getTime() - (long) lastUpdateTime.getTime();
/*将静止时间毫秒换算成秒*/
float timePeriodSecond = ((float) timePeriod / 1000);
if(timePeriodSecond > mHoldStillTime){
if(isRunScreenSaver == false){ //说明没有进入屏保
/* 启动线程去显示屏保 */
mHandler02.postAtTime(mTask02, intervalScreenSaver);
/*显示屏保置为true*/
isRunScreenSaver = true;
}else{
/*屏保正在显示中*/
}
}else{
/*说明静止之间没有超过规定时长*/
isRunScreenSaver = false;
}
/*反复调用自己进行检查*/
mHandler01.postDelayed(mTask01, intervalKeypadeSaver);
}
};
/**
* 持续屏保显示线程
*/
private Runnable mTask02 = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
if (isRunScreenSaver == true) { //如果屏保正在显示，就计算不断持续显示
// hideOriginalLayout();
showScreenSaver();
mHandler02.postDelayed(mTask02, intervalScreenSaver);
} else {
mHandler02.removeCallbacks(mTask02); //如果屏保没有显示则移除线程
}
}
};
/**
* 显示屏保
*/
private void showScreenSaver(){
Log.d("danxx", "显示屏保------>");
Intent intent = new Intent(MainActivity.this, ScreenSaverActivity.class);
startActivity(intent);
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
updateUserActionTime();
return super.dispatchKeyEvent(event);
}
/*用户有操作的时候不断重置静止时间和上次操作的时间*/
public void updateUserActionTime() {
Date timeNow = new Date(System.currentTimeMillis());
timePeriod = timeNow.getTime() - lastUpdateTime.getTime();
lastUpdateTime.setTime(timeNow.getTime());
}
@Override
protected void onResume() {
/*activity显示的时候启动线程*/
mHandler01.postAtTime(mTask01, intervalKeypadeSaver);
super.onResume();
}
@Override
protected void onPause() {
/*activity不可见的时候取消线程*/
mHandler01.removeCallbacks(mTask01);
mHandler02.removeCallbacks(mTask02);
super.onPause();
}
}
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