Android4.2 keyguard源码架构,学习(一)！
来源：互联网 发布：mysql怎么分页 编辑：程序博客网 时间：2024/05/21 19:53
最近这两年爱上写博客，是因为它可以很好的帮我理顺思路，特别是问题有点复杂的时候，很容易就陷进去。
首先用hierarchyviewer.bat查看当前界面的结构，找到突破口，然后慢慢找。
MediatekGlowPadView.java
KeyguardViewManager.java
KeyguardSelectorView.java
KeyguardHostView.java
KeyguardViewMediator.java
SlidingChallengeLayout.java
既然是java语言写的，那肯定得一面向对象得思路来分析，对象从小到大。MediatekGlowPadView对象首先是view的派生类，负责用来显示，并且监听touch事件。
官方解释：一个可重用widget，包含一个中心，外圈和波浪动画。
public class MediatekGlowPadView extends View implements OnTouchListener {}截图明了：
U9.png)
首先看下构造函数：
主要就是初始化一些参数，例如圈的半径之类的。这里记录一个基础性的问题：
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.GlowPadView); mInnerRadius = a.getDimension(R.styleable.GlowPadView_innerRadius, mInnerRadius);
prvandroid:innerRadius="@*android:dimen/glowpadview_inner_radius"
styleable后面首先要接style的类型，下划线然后接具体的属性（GlowPadView_innerRadius）。
对于此类中比较生疏的有：tween动画效果
另外例一下对分析这个对象有很大帮助的重要函数：switchToState（） onTouchEvent（） handleTrigger（）。
private void handleTrigger(LockScreenNewEventView newEventView) { ///M: In case unlock blocks newly launched activity, we should direct ueser to unlock mode first if (mOnTriggerListener != null) { mOnTriggerListener.onTrigger(newEventView, -1); } Intent intent = new Intent(); int resourceId = newEventView.getResourceId(); switch (resourceId) { case com.mediatek.internal.R.drawable.ic_newevent_smsmms: intent.setComponent(new ComponentName(MMS_PACKAGE_NAME, MMS_CLASS_NAME)); launchActivity(intent); break; case com.mediatek.internal.R.drawable.ic_newevent_phone: intent.setComponent(new ComponentName(CALL_LOG_PACKAGE_NAME, CALL_LOG_CLASS_NAME)); launchActivity(intent); break; case com.mediatek.internal.R.drawable.ic_newevent_email: intent.setComponent(new ComponentName(EMAIL_PACKAGE_NAME, EMAIL_CLASS_NAME)); launchActivity(intent); break; default: Xlog.d(TAG, "handleTrigger unknown resource id, resourceId=" + resourceId); } }这里运用了典型的策略和机制分离思想。（可能有人会误解，上面代码中的实现机制是没有实际作用的，摆设），mOnTriggerListener.onTrigger(newEventView, -1)监听接口，实现是在KeyguardSelectorView.java文件中。
KeyguardSelectorView：这是整个主锁屏界面对象，不包含左右滑动的页面。除了上面的解锁图标外，还有一些其他显示信息，例如：sim信息，闹钟等
监听对象的实现：
MediatekGlowPadView.OnTriggerListener mOnTriggerListener = new MediatekGlowPadView.OnTriggerListener() { public void onTrigger(View v, int target) { final int resId = mGlowPadView.getResourceIdForTarget(target); switch (resId) { case com.android.internal.R.drawable.ic_action_assist_generic: Intent assistIntent = ((SearchManager) mContext.getSystemService(Context.SEARCH_SERVICE)) .getAssistIntent(mContext, UserHandle.USER_CURRENT); if (assistIntent != null) { mActivityLauncher.launchActivity(assistIntent, false, true, null, null); } else { Log.w(TAG, "Failed to get intent for assist activity"); } mCallback.userActivity(0); break; case com.android.internal.R.drawable.ic_lockscreen_camera: mActivityLauncher.launchCamera(null, null); mCallback.userActivity(0); break; case com.android.internal.R.drawable.ic_lockscreen_phone: Intent phoneIntent = new Intent(); phoneIntent.setComponent(new ComponentName("com.android.contacts", "com.android.contacts.activities.DialtactsActivity")); mActivityLauncher.launchActivity(phoneIntent, false, false, null, null); mCallback.userActivity(0); break; case com.android.internal.R.drawable.ic_lockscreen_sms: Intent smsIntent = new Intent(); smsIntent.setComponent(new ComponentName("com.android.mms", "com.android.mms.ui.BootActivity")); mActivityLauncher.launchActivity(smsIntent, false, false, null, null); mCallback.userActivity(0); break; case com.android.internal.R.drawable.ic_lockscreen_unlock_phantom: case com.android.internal.R.drawable.ic_lockscreen_unlock: mCallback.userActivity(0); mCallback.dismiss(false); break; /// M: Add a special case for incoming indicator feature, when indicator view launches activity, go to unlockscreen /// only if necessary, or you may see homescreen before activity is launched case -1: mCallback.userActivity(0); if (isSecure()) { mCallback.dismiss(false); } break; } }……………… }构造函数：很简单，就是实例化一个锁屏图形，LockPatternUtils。
主要ui显示：
@Override protected void onFinishInflate() { super.onFinishInflate(); mGlowPadView = (MediatekGlowPadView) findViewById(R.id.glow_pad_view); mGlowPadView.setOnTriggerListener(mOnTriggerListener); updateTargets(); mSecurityMessageDisplay = new KeyguardMessageArea.Helper(this); View bouncerFrameView = findViewById(R.id.keyguard_selector_view_frame); mBouncerFrame = bouncerFrameView.getBackground(); /// M: If dm lock is on, we should also hide widget @{ boolean dmLocked = KeyguardUpdateMonitor.getInstance(getContext()).dmIsLocked(); mGlowPadView.setVisibility(dmLocked ? View.INVISIBLE : View.VISIBLE); /// @} /// M: Init medaitke newevent feature related views if (Settings.System.getInt(getContext().getContentResolver(), INCOMING_INDICATOR_ON_LOCKSCREEN, 1) == 1) { Log.d(TAG, "constructor infalte newevent feature related views"); mGlowPadView.setLockScreenView(this); ViewGroup unLockPanel = (ViewGroup)findViewById(R.id.keyguard_unlock_panel); final LayoutInflater inflater = LayoutInflater.from(mContext); inflater.inflate(com.mediatek.internal.R.layout.keyguard_unread_event_view, unLockPanel, true); UnReadEventView unReadEventView = (UnReadEventView)findViewById(com.mediatek.internal.R.id.unread_event_view); /// M: Incoming Indicator for Keyguard Rotation @{ unReadEventView.setVisibility(dmLocked ? View.INVISIBLE : View.VISIBLE); unReadEventView.updateQueryBaseTimeAndRefreshUnReadNumber(KeyguardUpdateMonitor.getInstance(mContext).getQueryBaseTime()); /// @} setUnReadEventView(unReadEventView); mGlowPadView.syncUnReadEventView(unReadEventView); } }应用glow_pad_view.xml的布局，一般自定四个方向的解锁功能和图标，就从这里来找了。
开启监听。
另外这里总结一个现象，子界面的xml布局文件一般是在父界面调用。例如上面在KeyguardSelectorView中调用glow_pad_view.xml（对应MediatekGlowPadView）。
对应的Keyguard_selector_view.xml 布局文件：
<com.android.internal.policy.impl.keyguard.KeyguardSelectorView xmlns:prvandroid="http://schemas.android.com/apk/prv/res/android" xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/keyguard_selector_view" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_maxWidth="500dp" android:layout_maxHeight="@dimen/keyguard_security_height" android:clipChildren="false" android:clipToPadding="false" android:orientation="vertical" android:contentDescription="@string/keyguard_accessibility_slide_unlock"> <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center" android:clipChildren="false" android:clipToPadding="false" android:gravity="center"> <include layout="@layout/keyguard_message_area" android:layout_width="match_parent" android:layout_height="wrap_content" /> <View android:id="@+id/keyguard_selector_view_frame" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginLeft="16dp" android:layout_marginRight="16dp" android:background="@*android:drawable/kg_bouncer_bg_white"/> <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginTop="20dp" android:id="@+id/keyguard_unlock_panel"> <include layout="@layout/keyguard_glow_pad_container" /> </FrameLayout> <include layout="@layout/keyguard_eca" android:id="@+id/keyguard_selector_fade_container" android:layout_width="match_parent" android:layout_height="48dp" android:layout_gravity="bottom|center_horizontal" /> </FrameLayout></com.android.internal.policy.impl.keyguard.KeyguardSelectorView>
上面XmL文件可以很直观的看到布局界面，其中keyguard_unlock_panel就是glow_pad_view.xml的应用。
因为我这里主要是为了了解锁屏的架构，所以对其他的布局不做分析。
因为keyguard_selector_view.xml在KeyguardHostView中调用，接下来分析这个文件。
KeyguardHostView：这个三个keyguard界面对象。包含appwidget
首先看一下整体布局，keyguard_host_view.xml，这里分为port和land，port是SlidingChallengeLayout，land是MultiPaneChallengeLayout，下面我们以port为例分析：
<com.android.internal.policy.impl.keyguard.KeyguardHostView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:androidprv="http://schemas.android.com/apk/res/android" android:id="@+id/keyguard_host_view" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_horizontal" android:orientation="vertical"> <com.android.internal.policy.impl.keyguard.SlidingChallengeLayout android:id="@+id/sliding_layout" android:layout_width="match_parent" android:layout_height="match_parent"> <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" androidprv:layout_childType="mediatekLayerBackground"> </FrameLayout> <FrameLayout android:layout_width="match_parent" android:layout_height="wrap_content" androidprv:layout_childType="pageDeleteDropTarget"> <include layout="@layout/keyguard_widget_remove_drop_target" android:id="@+id/keyguard_widget_pager_delete_target" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="top|center_horizontal" /> </FrameLayout> <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" androidprv:layout_childType="widgets"> <include layout="@layout/keyguard_widget_pager" android:id="@+id/app_widget_container" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center"/> </FrameLayout> <View android:layout_width="match_parent" android:layout_height="match_parent" androidprv:layout_childType="scrim" android:background="#99000000" /> <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" androidprv:layout_childType="mediatekLayerForeground"> </FrameLayout> <com.android.internal.policy.impl.keyguard.KeyguardSecurityContainer android:id="@+id/keyguard_security_container" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_maxHeight="@dimen/keyguard_security_height" androidprv:layout_childType="challenge" android:padding="0dp" android:gravity="bottom|center_horizontal"> <com.android.internal.policy.impl.keyguard.KeyguardSecurityViewFlipper android:id="@+id/view_flipper" android:layout_width="match_parent" android:layout_height="match_parent" android:clipToPadding="false" android:paddingTop="@dimen/keyguard_security_view_margin" android:gravity="center"> </com.android.internal.policy.impl.keyguard.KeyguardSecurityViewFlipper> </com.android.internal.policy.impl.keyguard.KeyguardSecurityContainer> <ImageButton android:layout_width="match_parent" android:layout_height="@dimen/kg_widget_pager_bottom_padding" androidprv:layout_childType="expandChallengeHandle" android:focusable="true" android:background="@null" android:src="@drawable/keyguard_expand_challenge_handle" android:scaleType="center" android:contentDescription="@string/keyguard_accessibility_expand_lock_area" /> </com.android.internal.policy.impl.keyguard.SlidingChallengeLayout></com.android.internal.policy.impl.keyguard.KeyguardHostView>
0 0
- Android4.2 keyguard源码架构,学习(一)！
- android4.2 keyguard流程
- android4.4 锁屏(Keyguard)源码分析总结
- Android4.4之Keyguard一（LockSettingsService）
- Android4.4之Keyguard一LockPatternUtils
- Android4.4之Keyguard
- Android4.2 4.4keyguard锁屏流程梳理
- Android4.2蓝牙基础架构学习
- Android4.2蓝牙基础架构学习
- Android4.2蓝牙基础架构学习
- Android4.2蓝牙基础架构学习
- Android4.2蓝牙基础架构学习
- Android4.4之Keyguard--KeyguardSecurityModel
- Android4.4之Keyguard--KeyguardUpdateMonitor
- Android4.4之Keyguard--KeyguardMessageArea
- Android4.4之Keyguard--KeyguardSecurityViewHelper
- Android4.4之Keyguard--KeyguardSecurityView
- Android4.4之Keyguard--KeyguardHostView
- 设计Windows shell中set 命令的人应该好好反省一下自己（用set处理串时请注意空格）
- 前端页面——Cookie与Session有什么区别
- 【Unity Shaders】ShadowGun系列之一——飞机坠毁的浓烟效果
- WinterCamp 2013 长跑
- 最长回文子串
- Android4.2 keyguard源码架构,学习(一)！
- java多线程
- 牛腩新闻发布系统——文档是前进的指明灯
- Learn Beautiful Soup(3)——使用Beautiful Soup进行查找
- 如何利用.bat文件来对其它众多文件进行批量改名?
- 项目中requireJS的应用例子
- ArrayList、LinkedList、Vector区别
- c# DataGridView控件使用
- Android中图片大小和屏幕密度的关系讲解
