如何打印stacktrace的异常Android

Question

我想打印堆栈跟踪，因为此刻我有这个运行。

} catch (IOException e) { 
    throw new Error("Copying Failed"); 
} 

而且我已经被告知打印e.stacktrace();

我该怎么办呢？

Answer 1

} catch (IOException e) { 
    Log.e("YOUR_APP_LOG_TAG", "I got an error", e); 
} 

并检查输出logcat的。

Answer 2

} catch (IOException e) { 
    e.printStackTrace(); 
} 

Answer 3

这是最有可能你被要求通过e.printStackTrace();打印的堆栈跟踪...

} catch (IOException e) { 
    e.printStackTrace(); 
    throw new Error("Copying Failed"); 
} 

Answer 4

在Android中，您应该使用与Android使用的Logcat日志查看器很好地配合使用的日志方法。

} catch (IOException e) { 
    Log.e("YOUR ERROR TAG HERE", "Copying failed", e); 
} 

使用Log.e方法，它接受Throwable作为您确保日志类将采取堆栈跟踪和正确登录它logcat的一个参数。如果使用e.printStackTrace，它将使用常规的Java日志记录方法，并且它在Logcat中不会正确显示，并且在某些情况下，将不可能双击logcat中的类名称以跳转到上面提到的类和方法堆栈跟踪。

由零鸿沟打印堆栈跟踪看起来就像这样：

11-21 20:55:47.360: W/System.err(989): java.lang.ArithmeticException: divide by zero 
11-21 20:55:47.379: W/System.err(989): at test.tabs.TabChooser.onCreate(TabChooser.java:15) 
11-21 20:55:47.390: W/System.err(989): at android.app.Activity.performCreate(Activity.java:4465) 
11-21 20:55:47.410: W/System.err(989): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
11-21 20:55:47.410: W/System.err(989): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 
11-21 20:55:47.420: W/System.err(989): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 
11-21 20:55:47.420: W/System.err(989): at android.app.ActivityThread.access$600(ActivityThread.java:122) 
11-21 20:55:47.420: W/System.err(989): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 
11-21 20:55:47.420: W/System.err(989): at android.os.Handler.dispatchMessage(Handler.java:99) 
11-21 20:55:47.420: W/System.err(989): at android.os.Looper.loop(Looper.java:137) 
11-21 20:55:47.420: W/System.err(989): at android.app.ActivityThread.main(ActivityThread.java:4340) 
11-21 20:55:47.430: W/System.err(989): at java.lang.reflect.Method.invokeNative(Native Method) 
11-21 20:55:47.430: W/System.err(989): at java.lang.reflect.Method.invoke(Method.java:511) 
11-21 20:55:47.430: W/System.err(989): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
11-21 20:55:47.430: W/System.err(989): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
11-21 20:55:47.430: W/System.err(989): at dalvik.system.NativeStart.main(Native Method) 

异常被记录为警告和日志标签是不是非常有帮助。

零一分的正确记录看起来就像这样：

11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): Copying failed 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): java.lang.ArithmeticException: divide by zero 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at test.tabs.TabChooser.onCreate(TabChooser.java:16) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.app.Activity.performCreate(Activity.java:4465) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.app.ActivityThread.access$600(ActivityThread.java:122) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.os.Handler.dispatchMessage(Handler.java:99) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.os.Looper.loop(Looper.java:137) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at android.app.ActivityThread.main(ActivityThread.java:4340) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at java.lang.reflect.Method.invokeNative(Native Method) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at java.lang.reflect.Method.invoke(Method.java:511) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
11-21 21:03:32.480: E/YOUR ERROR TAG HERE(1356): at dalvik.system.NativeStart.main(Native Method) 

唯一的例外是正确登录与您的日志标签错误和日志信息。

Answer 5

的另一种方法，是非常有用的：

try 
{ 
... 
} 
catch (Exception e) 
{ 
    Log.e(APP_TAG, "STACKTRACE"); 
    Log.e(APP_TAG, Log.getStackTraceString(e)); 
}