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编辑器.md

File metadata and controls

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Android styles.xml

<resources>
	<style name="Widget.EditText">  
		 <item name="focusable">true</item>  
		 <item name="focusableInTouchMode">true</item>  
		 <item name="clickable">true</item>  
		 <item name="background">?attr/editTextBackground</item>  
		 <item name="textAppearance">?attr/textAppearanceMediumInverse</item>  
		 <item name="textColor">?attr/editTextColor</item>  
		 <item name="gravity">center_vertical</item>  
		 <item name="breakStrategy">simple</item>  
		 <item name="hyphenationFrequency">@dimen/config_preferredHyphenationFrequency</item>  
		 <item name="defaultFocusHighlightEnabled">false</item>  
	</style>
</resources>

themes.xml

<resources>
	<style name="Theme">
		<item name="editTextStyle">@style/Widget.EditText</item>
		...
	</style>
</rsources>

TextView handleTextChanged 最先接收到文本改变信息

TextView invalidateRegion 重绘某个区域

  1. Handler ：负责将任务添加到队列，执行结束后在主线程执行UI操作
  2. Looper ：未绑定的线程开启循环消息队列，并获取消息
  3. MessageQueue ：任务队列，保存发送的消息

Activity onclick View performClick

调试 TraceView Android Log MethodTracing HProf SamplingProfile monkey am traceview apktool androguard flowdroid doxygen Graphviz Bouml

"main@15761" prio=5 tid=0x2 nid=NA runnable
  java.lang.Thread.State: RUNNABLE
	  at android.widget.TextView.onDraw(TextView.java:7879)
	  at android.view.View.draw(View.java:22342)
	  at android.view.View.updateDisplayListIfDirty(View.java:21218)
	  at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4428)
	  at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4401)
	  at android.view.View.updateDisplayListIfDirty(View.java:21178)
	  at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4428)
	  at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4401)
	  at android.view.View.updateDisplayListIfDirty(View.java:21178)
	  at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4428)
	  at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4401)
	  at android.view.View.updateDisplayListIfDirty(View.java:21178)
	  at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4428)
	  at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4401)
	  at android.view.View.updateDisplayListIfDirty(View.java:21178)
	  at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4428)
	  at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4401)
	  at android.view.View.updateDisplayListIfDirty(View.java:21178)
	  at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4428)
	  at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4401)
	  at android.view.View.updateDisplayListIfDirty(View.java:21178)
	  at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:559)
	  at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:565)
	  at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:642)
	  at android.view.ViewRootImpl.draw(ViewRootImpl.java:4079)
	  at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3806)
	  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3077)
	  at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1943)
	  at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8151)
	  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)
	  at android.view.Choreographer.doCallbacks(Choreographer.java:796)
	  at android.view.Choreographer.doFrame(Choreographer.java:731)
	  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957)
	  at android.os.Handler.handleCallback(Handler.java:938)
	  at android.os.Handler.dispatchMessage(Handler.java:99)
	  at android.os.Looper.loop(Looper.java:223)
	  at android.app.ActivityThread.main(ActivityThread.java:7656)
	  at java.lang.reflect.Method.invoke(Method.java:-1)
	  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
	  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

onDraw RecordingCanvas DynamicLayout

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