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  • Android 打印java堆栈的几种方法

    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。
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  • 原文地址：https://www.cnblogs.com/myPersonalTailor/p/4901504.html
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