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按back键返回时，不结束当前的通话活动【生命周期】
/vendor/mediatek/proprietary/packages/apps/Dialer/java/com/android/incallui/InCallActivity.java
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
DialpadFragment dialpadFragment = getDialpadFragment();
if (dialpadFragment != null
&& dialpadFragment.isVisible()
&& dialpadFragment.onDialerKeyUp(event)) {
return true;
}
if (keyCode == KeyEvent.KEYCODE_CALL) {
// Always consume KEYCODE_CALL to ensure the PhoneWindow won't do anything with it.
return true;
}
return super.onKeyUp(keyCode, event);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_CALL:
if (!InCallPresenter.getInstance().handleCallKey()) {
LogUtil.e(
"InCallActivity.onKeyDown",
"InCallPresenter should always handle KEYCODE_CALL in onKeyDown");
}
// Always consume KEYCODE_CALL to ensure the PhoneWindow won't do anything with it.
return true;
// Note that KEYCODE_ENDCALL isn't handled here as the standard system-wide handling of it
// is exactly what's needed, namely
// (1) "hang up" if there's an active call, or
// (2) "don't answer" if there's an incoming call.
// (See PhoneWindowManager for implementation details.)
case KeyEvent.KEYCODE_CAMERA:
// Consume KEYCODE_CAMERA since it's easy to accidentally press the camera button.
return true;
case KeyEvent.KEYCODE_VOLUME_UP:
case KeyEvent.KEYCODE_VOLUME_DOWN:
case KeyEvent.KEYCODE_VOLUME_MUTE:
// Ringer silencing handled by PhoneWindowManager.
break;
case KeyEvent.KEYCODE_MUTE:
TelecomAdapter.getInstance()
.mute(!AudioModeProvider.getInstance().getAudioState().isMuted());
return true;
//*/add,saving back key life activity
case KeyEvent.KEYCODE_BACK:
moveTaskToBack(true);
return true;
//*/
case KeyEvent.KEYCODE_SLASH:
// When verbose logging is enabled, dump the view for debugging/testing purposes.
if (LogUtil.isVerboseEnabled()) {
View decorView = getWindow().getDecorView();
LogUtil.v("InCallActivity.onKeyDown", "View dump:\n%s", decorView);
return true;
}
break;
case KeyEvent.KEYCODE_EQUALS:
break;
default: // fall out
}
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