項目中遇見一個這樣的需求，就是當軟件在一定時間沒有操作時候需要彈出廣告頁面，當點擊廣告頁面時又進行軟件操作，也就是廣告要在軟件打開並且處於未操作狀態才會出來。
方法一：用handler+onTouchEvent實現延時發送請求
這個操作最好放到BaseActivity里進行。
[代碼]java代碼：
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private
Handler handler =
new
Handler();
private
long
time=
1000
*
60
*
5
;
@Override
public
boolean
onTouchEvent(MotionEvent event) {
switch
(event.getAction()) {
case
MotionEvent.ACTION_DOWN:
handler.removeCallbacks(runnable);
break
;
case
MotionEvent.ACTION_UP:
startAD();
break
;
}
return
super
.onTouchEvent(event);
}
private
Runnable runnable =
new
Runnable() {
@Override
public
void
run() {
跳轉到廣告頁面
}
};
public
void
startAD() {
handler.removeCallbacks(runnable);
handler.postDelayed(runnable, time);
}
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方法二：通過PowerManager.WakeLock實現
判斷屏幕是否變暗的這個思路去實現。
方法三：使用雙線程來實現 (時間超時或者在接收到鎖屏廣播的時候顯示)
可以在application或者activity的oncreated方法里面啟動監聽。
[代碼]java代碼：
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public
class
MainActivity
extends
Activity {
private
Handler mHandler01 =
new
Handler();
private
Handler mHandler02 =
new
Handler();
/* 上一次User有動作的Time Stamp */
private Date lastUpdateTime;
/* 計算User有幾秒沒有動作的 */
private long timePeriod;
/* 靜止超過N秒將自動進入屏保 */
private float mHoldStillTime = 10;
/*標識當前是否進入了屏保*/
private boolean isRunScreenSaver;
/*時間間隔*/
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可觸碰屏幕的時間 */
lastUpdateTime = new Date(System.currentTimeMillis());
}
/**
* 計時線程
*/
private Runnable mTask01 = new Runnable() {
@Override
public void run() {
Date timeNow = new Date(System.currentTimeMillis());
/* 計算User靜止不動作的時間間距 */
/**當前的系統時間 - 上次觸摸屏幕的時間 = 靜止不動的時間**/
timePeriod = (long) timeNow.getTime() - (long) lastUpdateTime.getTime();
/*將靜止時間毫秒換算成秒*/
float timePeriodSecond = ((float) timePeriod / 1000);
if(timePeriodSecond > mHoldStillTime){
if(isRunScreenSaver == false){ //說明沒有進入屏保
/* 啟動線程去顯示屏保 */
mHandler02.postAtTime(mTask02, intervalScreenSaver);
/*顯示屏保置為true*/
isRunScreenSaver = true;
}else{
/*屏保正在顯示中*/
}
}else{
/*說明靜止之間沒有超過規定時長*/
isRunScreenSaver = false;
}
/*反復調用自己進行檢查*/
mHandler01.postDelayed(mTask01, intervalKeypadeSaver);
}
};
/**
* 持續屏保顯示線程
*/
private Runnable mTask02 = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
if (isRunScreenSaver == true) { //如果屏保正在顯示，就計算不斷持續顯示
// hideOriginalLayout();
showScreenSaver();
mHandler02.postDelayed(mTask02, intervalScreenSaver);
} else {
mHandler02.removeCallbacks(mTask02); //如果屏保沒有顯示則移除線程
}
}
};
/**
* 顯示屏保
*/
private void showScreenSaver(){
Log.d("danxx", "顯示屏保------>");
Intent intent = new Intent(MainActivity.this, ScreenSaverActivity.class);
startActivity(intent);
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
updateUserActionTime();
return super.dispatchKeyEvent(event);
}
/*用戶有操作的時候不斷重置靜止時間和上次操作的時間*/
public void updateUserActionTime() {
Date timeNow = new Date(System.currentTimeMillis());
timePeriod = timeNow.getTime() - lastUpdateTime.getTime();
lastUpdateTime.setTime(timeNow.getTime());
}
@Override
protected void onResume() {
/*activity顯示的時候啟動線程*/
mHandler01.postAtTime(mTask01, intervalKeypadeSaver);
super.onResume();
}
@Override
protected void onPause() {
/*activity不可見的時候取消線程*/
mHandler01.removeCallbacks(mTask01);
mHandler02.removeCallbacks(mTask02);
super
.onPause();
}
}
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下面是啟動一個服務，當用戶按鎖屏鍵鎖屏的時候會發送一個廣播，我們在服務中接受到廣播后可以屏蔽系統的鎖屏，顯示我們自己的鎖屏：
[代碼]java代碼：
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public
class
ScreenService
extends
Service {
KeyguardManager mKeyguardManager =
null
;
private
KeyguardLock mKeyguardLock =
null
;
BroadcastReceiver mMasterResetReciever;
@Override
public
IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return
null
;
}
@Override
public
void
onCreate() {
//Log.e("ScreenService","onCreate()");
// TODO Auto-generated method stub
startScreenService();
super
.onCreate();
}
@Override
public
void
onStart(Intent intent,
int
startId) {
// Log.e("ScreenService","onStart");
// TODO Auto-generated method stub
startScreenService();
}
private
void
startScreenService(){
mKeyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
mKeyguardLock = mKeyguardManager.newKeyguardLock(
""
);
mKeyguardLock.disableKeyguard();
//Intent.ACTION_SCREEN_OFF
mMasterResetReciever =
new
BroadcastReceiver() {
@Override
public
void
onReceive(Context context, Intent intent) {
try
{
Intent i =
new
Intent();
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.setClass(context, ScreenSaverActivity.
class
);
context.startActivity(i);
}
catch
(Exception e) {
Log.i(
"mMasterResetReciever:"
, e.toString());
}
}
};
registerReceiver(mMasterResetReciever,
new
IntentFilter(Intent.ACTION_SCREEN_OFF));
}
@Override
public
void
onDestroy() {
//Log.e("ScreenService","onDestroy()");
super
.onDestroy();
unregisterReceiver(mMasterResetReciever);
ScreenService.
this
.stopSelf();
}
}
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