实时打印stack trace, 免得使用gdb了.

实现文件:
PrintStackTrace.java
"
package com.android.providers.downloads;

import android.util.Log;

public class PrintStackTrace { 
//Invoke the static method where you want to print a stack trace 
public static void printStackTrace(Class cls) { 
        StackTraceElement[] elements = (new Throwable()).getStackTrace(); 
        StringBuffer buf = new StringBuffer(); 
        buf.append("Stack for "   cls.getName()   ":"); 
        for(int i=0; i<elements.length; i  ) { 
         buf.append("\n    "  
             elements[i].getClassName() 
             "."  
             elements[i].getMethodName()  
             "("  
             elements[i].getFileName()  
             ":"  
             elements[i].getLineNumber() 
             ")"); 
        } 
        //System.out.println(buf.toString()); 
        Log.i("ahking", " "  buf.toString());
} 
/*
    public static void main(String args[])   { 
     //An example to show how to invoke it 
     printStackTrace(Test.class); 
    } 
*/
} 
"

调用的地方:
PrintStackTrace.printStackTrace(DownloadThread.class);  //把当前类.class传进去.

 

Log输出:
01-01 00:03:55.648 I/ahking  ( 1513):  Stack for com.android.providers.downloads.DownloadThread:
01-01 00:03:55.648 I/ahking  ( 1513):     com.android.providers.downloads.PrintStackTrace.printStackTrace(PrintStackTrace.java:10)
01-01 00:03:55.648 I/ahking  ( 1513):     com.android.providers.downloads.DownloadThread.transferData(DownloadThread.java:285)
01-01 00:03:55.648 I/ahking  ( 1513):     com.android.providers.downloads.DownloadThread.executeDownload(DownloadThread.java:254)
01-01 00:03:55.648 I/ahking  ( 1513):     com.android.providers.downloads.DownloadThread.run(DownloadThread.java:182)

 

看工程时, 分析不出来当前函数是如何被调用到的, 用这个方法非常有用.

更简单的方式:

(new Throwable()).printStackTrace();

Log输出, 在log中搜System.err关键字就可以了:

01-01 00:33:36.398 W/System.err( 1525): java.lang.Throwable
01-01 00:33:36.398 W/System.err( 1525):     at com.android.providers.downloads.DownloadThread.transferData(DownloadThread.java:287)
01-01 00:33:36.398 W/System.err( 1525):     at com.android.providers.downloads.DownloadThread.executeDownload(DownloadThread.java:254)
01-01 00:33:36.406 W/System.err( 1525):     at com.android.providers.downloads.DownloadThread.run(DownloadThread.java:182)