在C語言中，Log時可以使用 __func__ 及 __LINE__ 取得目前程式所執行的函式和行數，在Android中的StackTraceElement物件也提供了類似的功能，它記錄了Call stack的許多資訊，包括執行檔案名稱、程式碼行號、方法(或函數)名稱、類別名稱。
程式範例：
package com.example.getstacktrace;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
trace("test");
}
private void trace(String msg) {
StackTraceElement[] stack = Thread.currentThread().getStackTrace();
for(int i = 0; i < stack.length; i++) {
StackTraceElement s = stack[i];
Log.d("Brian", "i=" + i);
Log.d("Brian", "ClassName="+s.getClassName());
Log.d("Brian", "FileName="+s.getFileName());
Log.d("Brian", "MethodName="+s.getMethodName());
Log.d("Brian", "LineName="+s.getLineNumber());
i ++;
}
Log.d("Brian ", msg);
}
}
輸出結果：
11-05 15:25:49.748: D/Brian(6662): i=0
11-05 15:25:49.748: D/Brian(6662): ClassName=dalvik.system.VMStack
11-05 15:25:49.748: D/Brian(6662): FileName=VMStack.java
11-05 15:25:49.748: D/Brian(6662): MethodName=getThreadStackTrace
11-05 15:25:49.748: D/Brian(6662): LineNumber=-2
11-05 15:25:49.748: D/Brian(6662): i=1
11-05 15:25:49.748: D/Brian(6662): ClassName=java.lang.Thread
11-05 15:25:49.748: D/Brian(6662): FileName=Thread.java
11-05 15:25:49.748: D/Brian(6662): MethodName=getStackTrace
11-05 15:25:49.748: D/Brian(6662): LineNumber=599
11-05 15:25:49.748: D/Brian(6662): i=2
11-05 15:25:49.748: D/Brian(6662): ClassName=com.example.getstacktrace.MainActivity
11-05 15:25:49.748: D/Brian(6662): FileName=MainActivity.java
11-05 15:25:49.748: D/Brian(6662): MethodName=trace
11-05 15:25:49.748: D/Brian(6662): LineNumber=16
11-05 15:25:49.748: D/Brian(6662): i=3
11-05 15:25:49.748: D/Brian(6662): ClassName=com.example.getstacktrace.MainActivity
11-05 15:25:49.748: D/Brian(6662): FileName=MainActivity.java
11-05 15:25:49.748: D/Brian(6662): MethodName=onCreate
11-05 15:25:49.748: D/Brian(6662): LineNumber=12
11-05 15:25:49.748: D/Brian(6662): i=4
11-05 15:25:49.748: D/Brian(6662): ClassName=android.app.Activity
11-05 15:25:49.748: D/Brian(6662): FileName=Activity.java
11-05 15:25:49.748: D/Brian(6662): MethodName=performCreate
11-05 15:25:49.748: D/Brian(6662): LineNumber=5165
11-05 15:25:49.748: D/Brian(6662): i=5
11-05 15:25:49.748: D/Brian(6662): ClassName=android.app.Instrumentation
11-05 15:25:49.748: D/Brian(6662): FileName=Instrumentation.java
11-05 15:25:49.748: D/Brian(6662): MethodName=callActivityOnCreate
11-05 15:25:49.748: D/Brian(6662): LineNumber=1103
11-05 15:25:49.758: D/Brian(6662): i=6
11-05 15:25:49.758: D/Brian(6662): ClassName=android.app.ActivityThread
11-05 15:25:49.758: D/Brian(6662): FileName=ActivityThread.java
11-05 15:25:49.758: D/Brian(6662): MethodName=performLaunchActivity
11-05 15:25:49.758: D/Brian(6662): LineNumber=2416
11-05 15:25:49.758: D/Brian(6662): i=7
11-05 15:25:49.758: D/Brian(6662): ClassName=android.app.ActivityThread
11-05 15:25:49.758: D/Brian(6662): FileName=ActivityThread.java
11-05 15:25:49.758: D/Brian(6662): MethodName=handleLaunchActivity
11-05 15:25:49.758: D/Brian(6662): LineNumber=2521
11-05 15:25:49.758: D/Brian(6662): i=8
11-05 15:25:49.758: D/Brian(6662): ClassName=android.app.ActivityThread
11-05 15:25:49.758: D/Brian(6662): FileName=ActivityThread.java
11-05 15:25:49.758: D/Brian(6662): MethodName=access$600
11-05 15:25:49.758: D/Brian(6662): LineNumber=162
11-05 15:25:49.758: D/Brian(6662): i=9
11-05 15:25:49.758: D/Brian(6662): ClassName=android.app.ActivityThread$H
11-05 15:25:49.758: D/Brian(6662): FileName=ActivityThread.java
11-05 15:25:49.758: D/Brian(6662): MethodName=handleMessage
11-05 15:25:49.758: D/Brian(6662): LineNumber=1370
11-05 15:25:49.758: D/Brian(6662): i=10
11-05 15:25:49.758: D/Brian(6662): ClassName=android.os.Handler
11-05 15:25:49.758: D/Brian(6662): FileName=Handler.java
11-05 15:25:49.758: D/Brian(6662): MethodName=dispatchMessage
11-05 15:25:49.758: D/Brian(6662): LineNumber=99
11-05 15:25:49.758: D/Brian(6662): i=11
11-05 15:25:49.758: D/Brian(6662): ClassName=android.os.Looper
11-05 15:25:49.758: D/Brian(6662): FileName=Looper.java
11-05 15:25:49.758: D/Brian(6662): MethodName=loop
11-05 15:25:49.758: D/Brian(6662): LineNumber=158
11-05 15:25:49.758: D/Brian(6662): i=12
11-05 15:25:49.758: D/Brian(6662): ClassName=android.app.ActivityThread
11-05 15:25:49.758: D/Brian(6662): FileName=ActivityThread.java
11-05 15:25:49.758: D/Brian(6662): MethodName=main
11-05 15:25:49.758: D/Brian(6662): LineNumber=5777
11-05 15:25:49.758: D/Brian(6662): i=13
11-05 15:25:49.758: D/Brian(6662): ClassName=java.lang.reflect.Method
11-05 15:25:49.758: D/Brian(6662): FileName=Method.java
11-05 15:25:49.758: D/Brian(6662): MethodName=invokeNative
11-05 15:25:49.758: D/Brian(6662): LineNumber=-2
11-05 15:25:49.758: D/Brian(6662): i=14
11-05 15:25:49.758: D/Brian(6662): ClassName=java.lang.reflect.Method
11-05 15:25:49.758: D/Brian(6662): FileName=Method.java
11-05 15:25:49.758: D/Brian(6662): MethodName=invoke
11-05 15:25:49.758: D/Brian(6662): LineNumber=511
11-05 15:25:49.758: D/Brian(6662): i=15
11-05 15:25:49.758: D/Brian(6662): ClassName=com.android.internal.os.ZygoteInit$MethodAndArgsCaller
11-05 15:25:49.758: D/Brian(6662): FileName=ZygoteInit.java
11-05 15:25:49.758: D/Brian(6662): MethodName=run
11-05 15:25:49.758: D/Brian(6662): LineNumber=1083
11-05 15:25:49.758: D/Brian(6662): i=16
11-05 15:25:49.758: D/Brian(6662): ClassName=com.android.internal.os.ZygoteInit
11-05 15:25:49.758: D/Brian(6662): FileName=ZygoteInit.java
11-05 15:25:49.758: D/Brian(6662): MethodName=main
11-05 15:25:49.758: D/Brian(6662): LineNumber=850
11-05 15:25:49.758: D/Brian(6662): i=17
11-05 15:25:49.758: D/Brian(6662): ClassName=dalvik.system.NativeStart
11-05 15:25:49.758: D/Brian(6662): FileName=NativeStart.java
11-05 15:25:49.758: D/Brian(6662): MethodName=main
11-05 15:25:49.758: D/Brian(6662): LineNumber=-2
11-05 15:25:49.758: D/Brian(6662): test
挑自己需要的StackTraceElement包成Method就很好Debug了！
