breakpoint查看调用栈

如何显示调用堆栈介绍过Android开发时如何在代码中打印调用栈，但是这种方式还需要重新编译代码，比较费时费力。其实breakpoint就自带这个功能，叫Evaluate and log。这个功能可以在breakpoint地方输出log。具体方法如下：

log如下:

java.lang.Exception    at com.droidcba.kedditbysteps.features.news.NewsFragment.requestNews(NewsFragment.kt:86)    at com.droidcba.kedditbysteps.features.news.NewsFragment.onActivityCreated(NewsFragment.kt:68)    at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:2201)    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1326)    at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1528)    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1595)    at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:758)    at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2363)    at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2149)    at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2103)    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2013)    at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)    at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:607)    at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:178)    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1254)    at android.app.Activity.performStart(Activity.java:6930)    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2756)    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2864)    at android.app.ActivityThread.-wrap12(ActivityThread.java)    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)    at android.os.Handler.dispatchMessage(Handler.java:105)    at android.os.Looper.loop(Looper.java:156)    at android.app.ActivityThread.main(ActivityThread.java:6531)    at java.lang.reflect.Method.invoke(Native Method)    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)