一,android佈局太深致使的 java.lang.StackOverflowErrorjava
E/AndroidRuntime( 1900): java.lang.StackOverflowError
E/AndroidRuntime( 1900): at android.graphics.Canvas.drawText(Canvas.java:1269)
E/AndroidRuntime( 1900): at android.text.Layout.draw(Layout.java:337)
E/AndroidRuntime( 1900): at android.widget.TextView.onDraw(TextView.java:4006)
E/AndroidRuntime( 1900): at android.view.View.draw(View.java:6057)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1545)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.View.draw(View.java:6060)
E/AndroidRuntime( 1900): at android.view.View.buildDrawingCache(View.java:5823)
E/AndroidRuntime( 1900): at android.view.View.getDrawingCache(View.java:5661)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1481)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.widget.AbsListView.dispatchDraw(AbsListView.java:1322)
E/AndroidRuntime( 1900): at android.widget.ListView.dispatchDraw(ListView.java:2841)
E/AndroidRuntime( 1900): at android.view.View.draw(View.java:6164)
E/AndroidRuntime( 1900): at android.widget.AbsListView.draw(AbsListView.java:2169)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1545)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.View.draw(View.java:6060)
E/AndroidRuntime( 1900): at android.widget.FrameLayout.draw(FrameLayout.java:352)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1545)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.ViewGroup.drawChild(ViewGroup.java:1543)
E/AndroidRuntime( 1900): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1281)
E/AndroidRuntime( 1900): at android.view.View.draw(View.java:6060)
E/AndroidRuntime( 1900): at android.widget.FrameLayout.draw(FrameLayout.java:352)
E/AndroidRuntime( 1900): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2038)
E/AndroidRuntime( 1900): at android.view.ViewRoot.draw(ViewRoot.java:1233)
E/AndroidRuntime( 1900): at android.view.ViewRoot.performTraversals(ViewRoot.java:1042)
E/AndroidRuntime( 1900): at android.view.ViewRoot.handleMessage(ViewRoot.java:1502)
E/AndroidRuntime( 1900): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 1900): at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime( 1900): at android.app.ActivityThread.main(ActivityThread.java:3972)
E/AndroidRuntime( 1900): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 1900): at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime( 1900): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
E/AndroidRuntime( 1900): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:543)
E/AndroidRuntime( 1900): at dalvik.system.NativeStart.main(Native Method)
I/Process ( 833): Sending signal. PID: 1900 SIG: 3android
解決方式:減小布局嵌套層數,特別是用到相似tabHost,ViewPager的控件時,要考慮到最底層的 activity 的app
contentView的佈局,儘可能簡化,多用RelativeLayout替代LinearLayout函數
一樣再優化列表滑動效率的時候,簡化item佈局也能帶來巨大的體驗提高oop
二,函數調用層級太多致使的 java.lang.StackOverflowError,如死循環,遞歸等佈局
StackOverflowError是因爲當前線程的棧滿了 ,也就是函數調用層級過多致使。優化
好比死遞歸。ui
如:this
public String homePage(){
this.findAllNews();
return "shouye";
}spa
public String findAllNews(){
List newslist= hotnewsService.findAll();
HotnewsDto hotnews= (HotnewsDto) newslist.get(0);//獲得第一條新聞
String content=hotnews.getContent();
String subcontent=content.substring(0, 80);//截取這條新聞信息內容在首頁部分顯示
super.setRequestAttribute("hotnews", hotnews);
super.setRequestAttribute("newslist", newslist);
super.setRequestAttribute("subcontent", subcontent);
return homePage;
}
如紅色標記處,這樣子調用的方法,至關於一個無限循環了!
解決辦法:
我習慣將 findAllNews方法的返回值設爲 void 便可