Android——StackTraceElement线程运行栈的探索

介绍

StackTraceElement[]中保存了一条线程中所有调用的方法。其中每个方法的信息包含在一个StackTraceElement对象中。

获取StackTraceElement中的信息

element.getClassName(); //获取类名element.getMethodLine(); //获取方法名element.getMethodName(); //获取方法名element.getFileName(); //获取包含类的文件名

StackTraceElement[]中的信息

StackTracelElement[]是一个的数组，以下标1为开始，其中在Java比较有用的是第3个，在Android中比较有用的是第4个,因为在Android中多了一个Dalvik的调用，所以实际Java中的第3位向后移动了一个位置，变成第4位。
这个比较有用的StackTraceElement保存了实际调用该方法的方法信息。

//下面方法能够打印一组当前线程的StackTraceElement[]信息：public static String showAllElementsInfo() {    String print = "";    int count = 0;    //从当前线程中获取所有的StackTraceElement    StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();    for (StackTraceElement stackTraceElement : stackTraceElements) {      count++;      print += String.format("ClassName:%s " +          "\nMethodName:%s " +          "\nMethodLine:%d " +          "\n当前是第%d个 " +          "\n---------------------------- " +          "\n ",          stackTraceElement.getClassName(),          stackTraceElement.getMethodName(),          stackTraceElement.getLineNumber(),          count);    }    return print;  }  //我是在单元测试中调用的  @Test  public void testTestElement() throws Exception {    System.out.println(LogUtils.showAllElementsInfo());  }//下面是测试打印结果：ClassName:java.lang.Thread MethodName:getStackTrace MethodLine:1552 当前是第1个 ----------------------------  ClassName:com.example.chenbing.animdvedemo.Utils.LogUtils MethodName:showAllElementsInfo MethodLine:60 当前是第2个 ----------------------------  ClassName:com.example.chenbing.animdvedemo.Utils.LogUtilsTest MethodName:testTestElement MethodLine:32 当前是第3个 //注意此处打印的就是调用了showAllElementsInfo()的testTestElement()的方法信息。----------------------------  ClassName:sun.reflect.NativeMethodAccessorImpl MethodName:invoke0 MethodLine:-2 当前是第4个 ----------------------------  ClassName:sun.reflect.NativeMethodAccessorImpl MethodName:invoke MethodLine:62 当前是第5个 ----------------------------  ClassName:sun.reflect.DelegatingMethodAccessorImpl MethodName:invoke MethodLine:43 当前是第6个 ----------------------------  ClassName:java.lang.reflect.Method MethodName:invoke MethodLine:498 当前是第7个 ----------------------------  ClassName:org.junit.runners.model.FrameworkMethod$1 MethodName:runReflectiveCall MethodLine:50 当前是第8个 ----------------------------  ClassName:org.junit.internal.runners.model.ReflectiveCallable MethodName:run MethodLine:12 当前是第9个 ----------------------------  ClassName:org.junit.runners.model.FrameworkMethod MethodName:invokeExplosively MethodLine:47 当前是第10个 ----------------------------  ClassName:org.junit.internal.runners.statements.InvokeMethod MethodName:evaluate MethodLine:17 当前是第11个 ----------------------------  ClassName:org.junit.internal.runners.statements.RunBefores MethodName:evaluate MethodLine:26 当前是第12个 ----------------------------  ClassName:org.junit.internal.runners.statements.RunAfters MethodName:evaluate MethodLine:27 当前是第13个 ----------------------------  ClassName:org.junit.runners.ParentRunner MethodName:runLeaf MethodLine:325 当前是第14个 ----------------------------  ClassName:org.junit.runners.BlockJUnit4ClassRunner MethodName:runChild MethodLine:78 当前是第15个 ----------------------------  ClassName:org.junit.runners.BlockJUnit4ClassRunner MethodName:runChild MethodLine:57 当前是第16个 ----------------------------  ClassName:org.junit.runners.ParentRunner$3 MethodName:run MethodLine:290 当前是第17个 ----------------------------  ClassName:org.junit.runners.ParentRunner$1 MethodName:schedule MethodLine:71 当前是第18个 ----------------------------  ClassName:org.junit.runners.ParentRunner MethodName:runChildren MethodLine:288 当前是第19个 ----------------------------  ClassName:org.junit.runners.ParentRunner MethodName:access$000 MethodLine:58 当前是第20个 ----------------------------  ClassName:org.junit.runners.ParentRunner$2 MethodName:evaluate MethodLine:268 当前是第21个 ----------------------------  ClassName:org.junit.runners.ParentRunner MethodName:run MethodLine:363 当前是第22个 ----------------------------  ClassName:org.junit.runner.JUnitCore MethodName:run MethodLine:137 当前是第23个 ----------------------------  ClassName:com.intellij.junit4.JUnit4IdeaTestRunner MethodName:startRunnerWithArgs MethodLine:69 当前是第24个 ----------------------------  ClassName:com.intellij.rt.execution.junit.JUnitStarter MethodName:prepareStreamsAndStart MethodLine:234 当前是第25个 ----------------------------  ClassName:com.intellij.rt.execution.junit.JUnitStarter MethodName:main MethodLine:74 当前是第26个 ----------------------------  ClassName:sun.reflect.NativeMethodAccessorImpl MethodName:invoke0 MethodLine:-2 当前是第27个 ----------------------------  ClassName:sun.reflect.NativeMethodAccessorImpl MethodName:invoke MethodLine:62 当前是第28个 ----------------------------  ClassName:sun.reflect.DelegatingMethodAccessorImpl MethodName:invoke MethodLine:43 当前是第29个 ----------------------------  ClassName:java.lang.reflect.Method MethodName:invoke MethodLine:498 当前是第30个 ----------------------------  ClassName:com.intellij.rt.execution.application.AppMain MethodName:main MethodLine:144 当前是第31个 ----------------------------