目录
锁屏界面
1. 显示用户切换
1. updateVisibilities
// android/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarView.java
private void updateVisibilities() {
if (mMultiUserSwitch.getParent() != mStatusIconArea && !mKeyguardUserSwitcherShowing) {
if (mMultiUserSwitch.getParent() != null) {
getOverlay().remove(mMultiUserSwitch);
}
mStatusIconArea.addView(mMultiUserSwitch, 0);
} else if (mMultiUserSwitch.getParent() == mStatusIconArea && mKeyguardUserSwitcherShowing) {
mStatusIconArea.removeView(mMultiUserSwitch);
}
// 1. 配置mKeyguardUserSwitcher
if (mKeyguardUserSwitcher == null) {
// If we have no keyguard switcher, the screen width is under 600dp. In this case,
// we only show the multi-user switch if it's enabled through UserManager as well as
// by the user.
// 2. 配置isMultiUserEnabled
if (mMultiUserSwitch.isMultiUserEnabled()) {
mMultiUserSwitch.setVisibility(View.VISIBLE);
} else {
mMultiUserSwitch.setVisibility(View.GONE);
}
}
mBatteryView.setForceShowPercent(mBatteryCharging && mShowPercentAvailable);
}
private void updateUserSwitcher() {
// 如果mKeyguardUserSwitcher != null，则multi user的图标就是可以点击的
boolean keyguardSwitcherAvailable = mKeyguardUserSwitcher != null;
mMultiUserSwitch.setClickable(keyguardSwitcherAvailable);
mMultiUserSwitch.setFocusable(keyguardSwitcherAvailable);
mMultiUserSwitch.setKeyguardMode(keyguardSwitcherAvailable);
}
亮屏时候的调用栈
updateVisibilities:197, KeyguardStatusBarView (com.android.systemui.statusbar.phone)
setVisibility:457, KeyguardStatusBarView (com.android.systemui.statusbar.phone)
updateHeaderKeyguardAlpha:2216, NotificationPanelViewController (com.android.systemui.statusbar.phone)
setQsExpansion:1688, NotificationPanelViewController (com.android.systemui.statusbar.phone)
access$7400:129, NotificationPanelViewController (com.android.systemui.statusbar.phone)
onLayoutChange:3671, NotificationPanelViewController$OnLayoutChangeListener (com.android.systemui.statusbar.phone)
layout:22862, View (android.view)
layout:6389, ViewGroup (android.view)
layoutChildren:332, FrameLayout (android.widget)
onLayout:270, FrameLayout (android.widget)
layout:22844, View (android.view)
layout:6389, ViewGroup (android.view)
performLayout:3496, ViewRootImpl (android.view)
performTraversals:2964, ViewRootImpl (android.view)
doTraversal:1969, ViewRootImpl (android.view)
run:8203, ViewRootImpl$TraversalRunnable (android.view)
run:1060, Choreographer$CallbackRecord (android.view)
doCallbacks:881, Choreographer (android.view)
doFrame:816, Choreographer (android.view)
run:1045, Choreographer$FrameDisplayEventReceiver (android.view)
handleCallback:938, Handler (android.os)
dispatchMessage:99, Handler (android.os)
loop:223, Looper (android.os)
main:7695, ActivityThread (android.app)
invoke:-1, Method (java.lang.reflect)
run:592, RuntimeInit$MethodAndArgsCaller (com.android.internal.os)
main:1084, ZygoteInit (com.android.internal.os)
1. 配置mKeyguardUserSwitcher
// frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardUserSwitcher.java
public KeyguardUserSwitcher(Context context, ViewStub userSwitcher,
KeyguardStatusBarView statusBarView,
NotificationPanelViewController panelViewController) {
// 配置config_keyguardUserSwitcher为false，则不走下面了，mKeyguardUserSwitcher就为null了
boolean keyguardUserSwitcherEnabled =
context.getResources().getBoolean(
com.android.internal.R.bool.config_keyguardUserSwitcher) || ALWAYS_ON;
// 这个UserSwitcherController.class正常情况下都是true的，可以看./src/com/android/systemui/Dependency.java文件
UserSwitcherController userSwitcherController = Dependency.get(UserSwitcherController.class);
if (userSwitcherController != null && keyguardUserSwitcherEnabled) {
mUserSwitcherContainer = (Container) userSwitcher.inflate();
mBackground = new KeyguardUserSwitcherScrim(context);
reinflateViews();
mStatusBarView = statusBarView;
// 在这里调用setKeyguardUserSwitcher，设置mKeyguardUserSwitcher，使其不为null
mStatusBarView.setKeyguardUserSwitcher(this);
panelViewController.setKeyguardUserSwitcher(this);
mAdapter = new Adapter(context, userSwitcherController, this);
mAdapter.registerDataSetObserver(mDataSetObserver);
mUserSwitcherController = userSwitcherController;
mAppearAnimationUtils = new AppearAnimationUtils(context, 400, -0.5f, 0.5f,
Interpolators.FAST_OUT_SLOW_IN);
mUserSwitcherContainer.setKeyguardUserSwitcher(this);
} else {
mUserSwitcherContainer = null;
mStatusBarView = null;
mAdapter = null;
mAppearAnimationUtils = null;
mBackground = null;
}
}
// android/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarView.java
public void setKeyguardUserSwitcher(KeyguardUserSwitcher keyguardUserSwitcher) {
// 设置mKeyguardUserSwitcher，使其不为null
mKeyguardUserSwitcher = keyguardUserSwitcher;
mMultiUserSwitch.setKeyguardUserSwitcher(keyguardUserSwitcher);
updateUserSwitcher();
}
2. 配置isMultiUserEnabled()
// android/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/MultiUserSwitch.java
public boolean isMultiUserEnabled() {
// TODO(b/138661450) Move IPC calls to background
// 配置qs_show_user_switcher_for_single_user为false，这里也不一定会返回false
return whitelistIpcs(() -> mUserManager.isUserSwitcherEnabled(
mContext.getResources().getBoolean(R.bool.qs_show_user_switcher_for_single_user)));
}
// core\java\android\os\UserManager.java
public boolean isUserSwitcherEnabled(boolean showEvenIfNotActionable) {
// 多用户的时候，go设备只支持单用户
if (!supportsMultipleUsers()) {
return false;
}
// 查找一下，改user是否不允许进行USER_SWITCH操作
if (hasUserRestriction(DISALLOW_USER_SWITCH)) {
return false;
}
// If Demo Mode is on, don't show user switcher
if (isDeviceInDemoMode(mContext)) {
return false;
}
// Check the Settings.Global.USER_SWITCHER_ENABLED that the user can toggle on/off.
//
// 配置config_showUserSwitcherByDefault为false
final boolean userSwitcherSettingOn = Settings.Global.getInt(mContext.getContentResolver(),
Settings.Global.USER_SWITCHER_ENABLED,
Resources.getSystem().getBoolean(R.bool.config_showUserSwitcherByDefault) ? 1 : 0)
!= 0;
if (!userSwitcherSettingOn) {
return false;
}
// The feature is enabled. But is it worth showing?
return showEvenIfNotActionable
|| areThereUsersToWhichToSwitch() // There are switchable users.
|| !hasUserRestriction(UserManager.DISALLOW_ADD_USER); // New users can be added.
}
/** Returns whether there are any users (other than the current user) to which to switch. */
private boolean areThereUsersToWhichToSwitch() {
final List<UserInfo> users = getUsers(true);
if (users == null) {
return false;
}
int switchableUserCount = 0;
for (UserInfo user : users) {
if (user.supportsSwitchToByUser()) {
++switchableUserCount;
}
}
return switchableUserCount > 1;
}
2. 配置
// 1. common/overlay/overlay/frameworks/base/core/res/res/values-sw600dp/config.xml
<!-- Set to true to enable the user switcher on the keyguard. -->
<bool name="config_keyguardUserSwitcher">false</bool>
<!-- If true, show multiuser switcher by default unless the user specifically disables it. -->
<bool name="config_showUserSwitcherByDefault">false</bool>
// 2. common/overlay/overlay/frameworks/base/packages/SystemUI/res/values-sw600dp/bools.xml
<resources>
<!-- Whether to show the user switcher in quick settings when only a single user is present. -->
<bool name="qs_show_user_switcher_for_single_user">false</bool>
</resources>
3. go设备的流程
// android/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
protected void makeStatusBarView(@Nullable RegisterStatusBarResult result) {
final Context context = mContext;
updateDisplaySize(); // populates mDisplayMetrics
updateResources();
....
mNotificationPanelViewController.setUserSetupComplete(mUserSetup);
// 在isUserSwitcherEnabled函数中，由于go设备不支持多用户，所以直接返回false，就不会走到createUserSwitcher函数中
if (UserManager.get(mContext).isUserSwitcherEnabled()) {
createUserSwitcher();
}
}
protected void createUserSwitcher() {
// 然后就不会创建KeyguardUserSwitcher类，然后在上面的mKeyguardUserSwitcher就为null了
mKeyguardUserSwitcher = new KeyguardUserSwitcher(mContext,
mNotificationShadeWindowView.findViewById(R.id.keyguard_user_switcher),
mNotificationShadeWindowView.findViewById(R.id.keyguard_header),
mNotificationPanelViewController);
}
4. 问题
1. values文件夹中bools.xml和config.xml有什么区别？
都是一样的，只是名字不同而已，可能bools.xml里面放的，都是bool变量吧