Android 打印堆栈的几种方法

2015-04-10     0 个评论   来源：DMT专栏  

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在Android调试过程中经常会出现程序出现的结果不是我们预期的结果，那就需要加Log打印调试，看调用过程是否正确，此时就需要打印程序的调用栈，特别是Android代码相当庞大，打印堆栈更有利于我们分析问题，下面就记录下平时用到不退出程序打印堆栈的方法。

验证的方法相关简单，在Activity的类中创建一个方法ThrowException，在onCreate中调用此方法，看打印出什么

 

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public void ThrowException() {         // 调试打印堆栈而不退出         Log.d(TAG, Log.getStackTraceString(new Throwable()));         // 创建异常打印堆栈         Exception e = new Exception("this is a log");         e.printStackTrace();         // 获取当前线程的堆栈         for (StackTraceElement i : Thread.currentThread().getStackTrace()) {             Log.i(TAG, i.toString());         }         RuntimeException re = new RuntimeException();         re.fillInStackTrace();         Log.i(TAG, "stackTrace", re);         // 主动抛出异常调试         try {             Log.i(TAG,                     "--------------------------------NullPointerException-----------1");             throw new NullPointerException();         } catch (NullPointerException e1) {             // TODO: handle exception             Log.i(TAG, "--------------------------------NullPointerException");             Log.e(TAG, Log.getStackTraceString(e1));             // e1.printStackTrace();         }         Log.i(TAG,                 "--------------------------------NullPointerException-----------end");     }

1、Log.d(TAG, Log.getStackTraceString(new Throwable()));

 

 

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04-09 14:19:51.764 D/dzt_test(26317): java.lang.Throwable 04-09 14:19:51.764 D/dzt_test(26317):   at com.dzt.testapp.MainActivity.ThrowException(MainActivity.java:69) 04-09 14:19:51.764 D/dzt_test(26317):   at com.dzt.testapp.MainActivity.onCreate(MainActivity.java:63) 04-09 14:19:51.764 D/dzt_test(26317):   at android.app.Activity.performCreate(Activity.java:5343) 04-09 14:19:51.764 D/dzt_test(26317):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 04-09 14:19:51.764 D/dzt_test(26317):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2331) 04-09 14:19:51.764 D/dzt_test(26317):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429) 04-09 14:19:51.764 D/dzt_test(26317):   at android.app.ActivityThread.access$800(ActivityThread.java:151) 04-09 14:19:51.764 D/dzt_test(26317):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1342) 04-09 14:19:51.764 D/dzt_test(26317):   at android.os.Handler.dispatchMessage(Handler.java:110) 04-09 14:19:51.764 D/dzt_test(26317):   at android.os.Looper.loop(Looper.java:193) 04-09 14:19:51.764 D/dzt_test(26317):   at android.app.ActivityThread.main(ActivityThread.java:5333) 04-09 14:19:51.764 D/dzt_test(26317):   at java.lang.reflect.Method.invokeNative(Native Method) 04-09 14:19:51.764 D/dzt_test(26317):   at java.lang.reflect.Method.invoke(Method.java:515) 04-09 14:19:51.764 D/dzt_test(26317):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830) 04-09 14:19:51.764 D/dzt_test(26317):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:646) 04-09 14:19:51.764 D/dzt_test(26317):   at dalvik.system.NativeStart.main(Native Method)

2、

 

Exception e = new Exception("this is a log");
e.printStackTrace();

 

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04-09 14:19:51.764 W/System.err(26317): java.lang.Exception: this is a log 04-09 14:19:51.765 W/System.err(26317):     at com.dzt.testapp.MainActivity.ThrowException(MainActivity.java:72) 04-09 14:19:51.765 W/System.err(26317):     at com.dzt.testapp.MainActivity.onCreate(MainActivity.java:63) 04-09 14:19:51.765 W/System.err(26317):     at android.app.Activity.performCreate(Activity.java:5343) 04-09 14:19:51.765 W/System.err(26317):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 04-09 14:19:51.765 W/System.err(26317):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2331) 04-09 14:19:51.766 W/System.err(26317):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429) 04-09 14:19:51.766 W/System.err(26317):     at android.app.ActivityThread.access$800(ActivityThread.java:151) 04-09 14:19:51.766 W/System.err(26317):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1342) 04-09 14:19:51.766 W/System.err(26317):     at android.os.Handler.dispatchMessage(Handler.java:110) 04-09 14:19:51.766 W/System.err(26317):     at android.os.Looper.loop(Looper.java:193) 04-09 14:19:51.766 W/System.err(26317):     at android.app.ActivityThread.main(ActivityThread.java:5333) 04-09 14:19:51.766 W/System.err(26317):     at java.lang.reflect.Method.invokeNative(Native Method) 04-09 14:19:51.766 W/System.err(26317):     at java.lang.reflect.Method.invoke(Method.java:515) 04-09 14:19:51.766 W/System.err(26317):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830) 04-09 14:19:51.766 W/System.err(26317):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:646) 04-09 14:19:51.767 W/System.err(26317):     at dalvik.system.NativeStart.main(Native Method)

3、

 

 

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// 获取当前线程的堆栈         for (StackTraceElement i : Thread.currentThread().getStackTrace()) {             Log.i(TAG, i.toString());         }

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04-09 14:19:51.767 I/dzt_test(26317): dalvik.system.VMStack.getThreadStackTrace(Native Method) 04-09 14:19:51.768 I/dzt_test(26317): java.lang.Thread.getStackTrace(Thread.java:579) 04-09 14:19:51.768 I/dzt_test(26317): com.dzt.testapp.MainActivity.ThrowException(MainActivity.java:76) 04-09 14:19:51.768 I/dzt_test(26317): com.dzt.testapp.MainActivity.onCreate(MainActivity.java:63) 04-09 14:19:51.768 I/dzt_test(26317): android.app.Activity.performCreate(Activity.java:5343) 04-09 14:19:51.769 I/dzt_test(26317): android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 04-09 14:19:51.769 I/dzt_test(26317): android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2331) 04-09 14:19:51.769 I/dzt_test(26317): android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429) 04-09 14:19:51.769 I/dzt_test(26317): android.app.ActivityThread.access$800(ActivityThread.java:151) 04-09 14:19:51.770 I/dzt_test(26317): android.app.ActivityThread$H.handleMessage(ActivityThread.java:1342) 04-09 14:19:51.770 I/dzt_test(26317): android.os.Handler.dispatchMessage(Handler.java:110) 04-09 14:19:51.770 I/dzt_test(26317): android.os.Looper.loop(Looper.java:193) 04-09 14:19:51.770 I/dzt_test(26317): android.app.ActivityThread.main(ActivityThread.java:5333) 04-09 14:19:51.771 I/dzt_test(26317): java.lang.reflect.Method.invokeNative(Native Method) 04-09 14:19:51.771 I/dzt_test(26317): java.lang.reflect.Method.invoke(Method.java:515) 04-09 14:19:51.771 I/dzt_test(26317): com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830) 04-09 14:19:51.771 I/dzt_test(26317): com.android.internal.os.ZygoteInit.main(ZygoteInit.java:646) 04-09 14:19:51.771 I/dzt_test(26317): dalvik.system.NativeStart.main(Native Method)

4、

 

 

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RuntimeException re = new RuntimeException();         re.fillInStackTrace();         Log.i(TAG, "stackTrace", re);

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04-09 14:19:51.773 I/dzt_test(26317): stackTrace 04-09 14:19:51.773 I/dzt_test(26317): java.lang.RuntimeException 04-09 14:19:51.773 I/dzt_test(26317):   at com.dzt.testapp.MainActivity.ThrowException(MainActivity.java:81) 04-09 14:19:51.773 I/dzt_test(26317):   at com.dzt.testapp.MainActivity.onCreate(MainActivity.java:63) 04-09 14:19:51.773 I/dzt_test(26317):   at android.app.Activity.performCreate(Activity.java:5343) 04-09 14:19:51.773 I/dzt_test(26317):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 04-09 14:19:51.773 I/dzt_test(26317):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2331) 04-09 14:19:51.773 I/dzt_test(26317):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429) 04-09 14:19:51.773 I/dzt_test(26317):   at android.app.ActivityThread.access$800(ActivityThread.java:151) 04-09 14:19:51.773 I/dzt_test(26317):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1342) 04-09 14:19:51.773 I/dzt_test(26317):   at android.os.Handler.dispatchMessage(Handler.java:110) 04-09 14:19:51.773 I/dzt_test(26317):   at android.os.Looper.loop(Looper.java:193) 04-09 14:19:51.773 I/dzt_test(26317):   at android.app.ActivityThread.main(ActivityThread.java:5333) 04-09 14:19:51.773 I/dzt_test(26317):   at java.lang.reflect.Method.invokeNative(Native Method) 04-09 14:19:51.773 I/dzt_test(26317):   at java.lang.reflect.Method.invoke(Method.java:515) 04-09 14:19:51.773 I/dzt_test(26317):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830) 04-09 14:19:51.773 I/dzt_test(26317):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:646) 04-09 14:19:51.773 I/dzt_test(26317):   at dalvik.system.NativeStart.main(Native Method)

5、

 

 

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// 主动抛出异常调试         try {             Log.i(TAG,                     "--------------------------------NullPointerException-----------1");             throw new NullPointerException();         } catch (NullPointerException e1) {             // TODO: handle exception             Log.i(TAG, "--------------------------------NullPointerException");             Log.e(TAG, Log.getStackTraceString(e1));             // e1.printStackTrace();         }         Log.i(TAG,                 "--------------------------------NullPointerException-----------end");

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04-09 14:19:51.773 I/dzt_test(26317): --------------------------------NullPointerException-----------1 04-09 14:19:51.773 I/dzt_test(26317): --------------------------------NullPointerException 04-09 14:19:51.774 E/dzt_test(26317): java.lang.NullPointerException 04-09 14:19:51.774 E/dzt_test(26317):   at com.dzt.testapp.MainActivity.ThrowException(MainActivity.java:88) 04-09 14:19:51.774 E/dzt_test(26317):   at com.dzt.testapp.MainActivity.onCreate(MainActivity.java:63) 04-09 14:19:51.774 E/dzt_test(26317):   at android.app.Activity.performCreate(Activity.java:5343) 04-09 14:19:51.774 E/dzt_test(26317):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 04-09 14:19:51.774 E/dzt_test(26317):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2331) 04-09 14:19:51.774 E/dzt_test(26317):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2429) 04-09 14:19:51.774 E/dzt_test(26317):   at android.app.ActivityThread.access$800(ActivityThread.java:151) 04-09 14:19:51.774 E/dzt_test(26317):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1342) 04-09 14:19:51.774 E/dzt_test(26317):   at android.os.Handler.dispatchMessage(Handler.java:110) 04-09 14:19:51.774 E/dzt_test(26317):   at android.os.Looper.loop(Looper.java:193) 04-09 14:19:51.774 E/dzt_test(26317):   at android.app.ActivityThread.main(ActivityThread.java:5333) 04-09 14:19:51.774 E/dzt_test(26317):   at java.lang.reflect.Method.invokeNative(Native Method) 04-09 14:19:51.774 E/dzt_test(26317):   at java.lang.reflect.Method.invoke(Method.java:515) 04-09 14:19:51.774 E/dzt_test(26317):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:830) 04-09 14:19:51.774 E/dzt_test(26317):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:646) 04-09 14:19:51.774 E/dzt_test(26317):   at dalvik.system.NativeStart.main(Native Method) 04-09 14:19:51.775 I/dzt_test(26317): --------------------------------NullPointerException-----------end

虽然以上方法不尽一样，但打印出来的堆栈是一样的。