原來以為是 frameworks/base/policy/src/com/android/internal/policy/impl/PowerDialog.java，結果重點是source code 的開頭....
* @deprecated use {@link GlobalActions} instead
......所以去找 GlobalActions.java。
這個是畫出 PowerDialog 的 class。
最後是在 frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java 找到啟動的地方..
public int interceptKeyBeforeQueueing( )...
...
case KeyEvent.KEYCODE_POWER: {
result &= ~ACTION_PASS_TO_USER;
if (down) {
ITelephony telephonyService = getTelephonyService();
boolean hungUp = false;
if (telephonyService != null) {
try {
if (telephonyService.isRinging()) {
// Pressing Power while there's a ringing incoming
// call should silence the ringer.
telephonyService.silenceRinger();
} else if ((mIncallPowerBehavior
& Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR_HANGUP) != 0
&& telephonyService.isOffhook()) {
// Otherwise, if "Power button ends call" is enabled,
// the Power button will hang up any current active call.
hungUp = telephonyService.endCall();
}
} catch (RemoteException ex) {
Log.w(TAG, "ITelephony threw RemoteException", ex);
}
}
interceptPowerKeyDown(!isScreenOn || hungUp);
if((result & ACTION_WAKE_TO_SLEEP) !=0 && mPowerManager.getSystemState()==2)
{
// only try to turn off the screen if we didn't already hang up
mPowerKeyHandled = false;
mHandler.postDelayed(mPowerLongPress,
ViewConfiguration.getGlobalActionKeyTimeout());
result &= ~ACTION_PASS_TO_USER;
}
} else {
if (interceptPowerKeyUp(canceled)) {
result = (result & ~ACTION_POKE_USER_ACTIVITY) | ACTION_GO_TO_SLEEP;
}
}
break;
}
在 PowerButton 按下 (Down)的部份..有 call
private void interceptPowerKeyDown(boolean handled) {
mPowerKeyHandled = handled;
if (!handled) {
mHandler.postDelayed(mPowerLongPress, ViewConfiguration.getGlobalActionKeyTimeout());
}
}
這個 delayed callback function : mPowerLongPress 是
private final Runnable mPowerLongPress = new Runnable() {
public void run() {
if (!mPowerKeyHandled) {
mPowerKeyHandled = true;
performHapticFeedbackLw(null, HapticFeedbackConstants.LONG_PRESS, false);
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS);
showGlobalActionsDialog();
}
}
};
的最後是 showGlobalActionsDialog( ) -- 把 GlobalActions new 出來
void showGlobalActionsDialog() {
if (mGlobalActions == null) {
mGlobalActions = new GlobalActions(mContext);
}
final boolean keyguardShowing = mKeyguardMediator.isShowingAndNotHidden();
mGlobalActions.showDialog(keyguardShowing, isDeviceProvisioned());
if (keyguardShowing) {
// since it took two seconds of long press to bring this up,
// poke the wake lock so they have some time to see the dialog.
mKeyguardMediator.pokeWakelock();
}
}
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