1.Framework——WMS之WindowManager(窗口管理服务)实战
2.androidå¼å设置å±è½å½å¶
Framework——WMS之WindowManager(窗口管理服务)实战
在Android应用中,源码WindowManager(窗口管理服务)作为显示View的源码基石,其重要性不言而喻。源码它是源码Activity、Dialog和Toast背后的源码供应链管理系统源码底层支持,通过addView、源码openjdk14源码removeView和updateViewLayout等方法,源码以及WindowManager.LayoutParams进行属性设置,源码实现界面元素的源码管理与显示。
WMS作为系统服务的源码核心组件,与ActivityManagerService共同构成了框架业务的源码主导部分,其功能涵盖了视图管理的源码方方面面。从悬浮窗的源码rhel查看命令源码实现到SYSTEM_ALERT_WINDOW权限的处理,都需要理解和使用WMS。源码例如,源码悬浮窗的实现涉及OnTouch事件处理,包括获取坐标和处理返回值,电商源码原生而WindowManager的使用则通过LayoutParams类,尤其是Gravity属性来设置View的参考系和透明度。
设置View透明度时,LayoutParams的传奇巅峰引擎源码alpha属性起到了关键作用,从1.0f的完全不透明到0.0f的完全透明,提供了丰富的动态效果。此外,对于WindowManager添加的窗口,还需要关注使用系统提供的动画属性,以及通过Handler更新UI和定时器实现动态展示。想要深入学习和掌握这些技术,可以获取《Framework精通手册》和《Frame Work源码解析手册》等学习资料,这些资源将为你提供详尽的核心技术点。
总的来说,本文通过实践演示了如何简单实现一个悬浮窗,以及在framework的WMS机制中使用WindowManager的基本技巧。通过阅读和实践,你将对WindowManager有更深入的理解,并能更好地应用到自己的项目中。快来点击获取免费的学习资料,进一步提升你的框架技能吧。
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1ãWindow.java
//windowå¸å±åæ°private final WindowManager.LayoutParams mWindowAttributes = new WindowManager.LayoutParams();//æ·»å æ è¯public void addFlags(int flags) {
setFlags(flags, flags);
}//éè¿mWindowAttributes设置æ è¯public void setFlags(int flags, int mask) { final WindowManager.LayoutParams attrs = getAttributes();
attrs.flags = (attrs.flags&~mask) | (flags&mask);
mForcedWindowFlags |= mask;
dispatchWindowAttributesChanged(attrs);
}//è·å¾å¸å±åæ°å¯¹è±¡ï¼å³mWindowAttributespublic final WindowManager.LayoutParams getAttributes() { return mWindowAttributes;
}
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2ãPopupWindow.java
//æ¾ç¤ºPopupWindowpublic void showAtLocation(View parent, int gravity, int x, int y) {
mParentRootView = new WeakReference<>(parent.getRootView());
showAtLocation(parent.getWindowToken(), gravity, x, y);
}//æ¾ç¤ºPopupWindowpublic void showAtLocation(IBinder token, int gravity, int x, int y) { if (isShowing() || mContentView == null) { return;
}
TransitionManager.endTransitions(mDecorView);
detachFromAnchor();
mIsShowing = true;
mIsDropdown = false;
mGravity = gravity;
//å建Windowå¸å±åæ°å¯¹è±¡
final WindowManager.LayoutParams p =createPopupLayoutParams(token);
preparePopup(p);
p.x = x;
p.y = y;
invokePopup(p);
}//å建Windowå¸å±åæ°å¯¹è±¡protected final WindowManager.LayoutParams createPopupLayoutParams(IBinder token) { final WindowManager.LayoutParams p = new WindowManager.LayoutParams();
p.gravity = computeGravity();
p.flags = computeFlags(p.flags);
p.type = mWindowLayoutType;
p.token = token;
p.softInputMode = mSoftInputMode;
p.windowAnimations = computeAnimationResource(); if (mBackground != null) {
p.format = mBackground.getOpacity();
} else {
p.format = PixelFormat.TRANSLUCENT;
} if (mHeightMode < 0) {
p.height = mLastHeight = mHeightMode;
} else {
p.height = mLastHeight = mHeight;
} if (mWidthMode < 0) {
p.width = mLastWidth = mWidthMode;
} else {
p.width = mLastWidth = mWidth;
}
p.privateFlags = PRIVATE_FLAG_WILL_NOT_REPLACE_ON_RELAUNCH
| PRIVATE_FLAG_LAYOUT_CHILD_WINDOW_IN_PARENT_FRAME;
p.setTitle("PopupWindow:" + Integer.toHexString(hashCode())); return p;
}//å°PopupWindowæ·»å å°Windowä¸private void invokePopup(WindowManager.LayoutParams p) { if (mContext != null) {
p.packageName = mContext.getPackageName();
} final PopupDecorView decorView = mDecorView;
decorView.setFitsSystemWindows(mLayoutInsetDecor);
setLayoutDirectionFromAnchor();
mWindowManager.addView(decorView, p); if (mEnterTransition != null) {
decorView.requestEnterTransition(mEnterTransition);
}
}
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//éè¿mWindowAttributes设置æ è¯public void setFlags(int flags, int mask) { final WindowManager.LayoutParams attrs = getAttributes();
attrs.flags = (attrs.flags&~mask) | (flags&mask);
mForcedWindowFlags |= mask;
dispatchWindowAttributesChanged(attrs);
}
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//å°PopupWindowæ·»å å°Windowä¸private void invokePopup(WindowManager.LayoutParams p) { if (mContext != null) {
p.packageName = mContext.getPackageName();
}
final PopupDecorView decorView = mDecorView;
decorView.setFitsSystemWindows(mLayoutInsetDecor);
setLayoutDirectionFromAnchor(); //æ·»å View
mWindowManager.addView(decorView, p); if (mEnterTransition != null) {
decorView.requestEnterTransition(mEnterTransition);
}
}
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public class PopupWindow {
...... private WindowManager mWindowManager;
......
}
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public interface ViewManager{ public void addView(View view, ViewGroup.LayoutParams params); public void updateViewLayout(View view, ViewGroup.LayoutParams params); public void removeView(View view);
}
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package com.ccc.ddd.testpopupwindow.utils;
import android.os.Handler;
import android.view.WindowManager;
import android.widget.PopupWindow;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;public class PopNoRecordProxy implements InvocationHandler { private Object mWindowManager;//PopupWindowç±»çmWindowManager对象
public static PopNoRecordProxy instance() { return new PopNoRecordProxy();
} public void noScreenRecord(PopupWindow popupWindow) { if (popupWindow == null) { return;
} try { //éè¿åå°è·å¾PopupWindowç±»çç§æ对象ï¼mWindowManager
Field windowManagerField = PopupWindow.class.getDeclaredField("mWindowManager");
windowManagerField.setAccessible(true);
mWindowManager = windowManagerField.get(popupWindow); if(mWindowManager == null){ return;
} //å建WindowManagerçå¨æ代ç对象proxy
Object proxy = Proxy.newProxyInstance(Handler.class.getClassLoader(), new Class[]{ WindowManager.class}, this); //æ³¨å ¥å¨æ代ç对象proxyï¼å³ï¼mWindowManager对象ç±proxy对象æ¥ä»£çï¼
windowManagerField.set(popupWindow, proxy);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
}
@Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { try { //æ¦æªæ¹æ³mWindowManager.addView(View view, ViewGroup.LayoutParams params);
if (method != null && method.getName() != null && method.getName().equals("addView")
&& args != null && args.length == 2) { //è·åWindowManager.LayoutParamsï¼å³ï¼ViewGroup.LayoutParams
WindowManager.LayoutParams params = (WindowManager.LayoutParams) args[1]; //ç¦æ¢å½å±
setNoScreenRecord(params);
}
} catch (Exception ex) {
ex.printStackTrace();
} return method.invoke(mWindowManager, args);
} /
*** ç¦æ¢å½å±
*/
private void setNoScreenRecord(WindowManager.LayoutParams params) {
setFlags(params, WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
} /
*** å 许å½å±
*/
private void setAllowScreenRecord(WindowManager.LayoutParams params) {
setFlags(params, 0, WindowManager.LayoutParams.FLAG_SECURE);
} /
*** 设置WindowManager.LayoutParams flagå±æ§ï¼åèç³»ç»ç±»Window.setFlags(int flags, int mask)ï¼
*
* @param params WindowManager.LayoutParams
* @param flags The new window flags (see WindowManager.LayoutParams).
* @param mask Which of the window flag bits to modify.
*/
private void setFlags(WindowManager.LayoutParams params, int flags, int mask) { try { if (params == null) { return;
} params.flags = (params.flags & ~mask) | (flags & mask);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
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//å建PopupWindow
//æ£å¸¸é¡¹ç®ä¸ï¼è¯¥æ¹æ³å¯æ¹æå·¥åç±»
//æ£å¸¸é¡¹ç®ä¸ï¼ä¹å¯èªå®ä¹PopupWindowï¼å¨å ¶ç±»ä¸è®¾ç½®ç¦æ¢å½å±
private PopupWindow createPopupWindow(View view, int width, int height) {
PopupWindow popupWindow = new PopupWindow(view, width, height); //PopupWindowç¦æ¢å½å±
PopNoRecordProxy.instance().noScreenRecord(popupWindow); return popupWindow;
} //æ¾ç¤ºPopupwindow
private void showPm() {
View view = LayoutInflater.from(this).inflate(R.layout.pm1, null);
PopupWindow pw = createPopupWindow(view,ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
pw1.setFocusable(false);
pw1.showAtLocation(this.getWindow().getDecorView(), Gravity.BOTTOM | Gravity.RIGHT, PopConst.PopOffsetX, PopConst.PopOffsetY);
}
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