java.lang.NullPointerException（日志）（171204

主要报错信息（代码）

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mrd.myapplication2/com.example.mrd.myapplication2.MainActivity}: java.lang.NullPointerException

解决办法
1.查看报错代码
浏览所有代码中，有的可点击（下方有横线的），有的报错代码中在其它导入的包中，不在自己做的包中。
于是尝试性点击了如图中蓝色部分，跳到了如图位置。

at com.example.mrd.myapplication2.Fragment.FragmentTest.onCreateView(FragmentTest.java:32)

2.删掉onCreateView方法，运行，正常了。

3 删掉tv.setText(name);正常

4 修改tv.setText(name);为 tv.setText(“1”);app闪退
时间问题，待续。。。

PS:
1该错误类型的原因网上已经有很多归纳总结，且本文为日志贴，不作拓展。
2我是小白
3程序是移植的代码

全部报错信息

FATAL EXCEPTION: main
                                                   Process: com.example.mrd.myapplication2, PID: 10163
                                                   java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mrd.myapplication2/com.example.mrd.myapplication2.MainActivity}: java.lang.NullPointerException
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2193)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2243)
                                                       at android.app.ActivityThread.access$800(ActivityThread.java:135)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
                                                       at android.os.Handler.dispatchMessage(Handler.java:102)
                                                       at android.os.Looper.loop(Looper.java:136)
                                                       at android.app.ActivityThread.main(ActivityThread.java:5019)
                                                       at java.lang.reflect.Method.invokeNative(Native Method)
                                                       at java.lang.reflect.Method.invoke(Method.java:515)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
                                                       at dalvik.system.NativeStart.main(Native Method)
                                                    Caused by: java.lang.NullPointerException
                                                       at com.example.mrd.myapplication2.Fragment.FragmentTest.onCreateView(FragmentTest.java:32)
                                                       at android.support.v4.app.Fragment.performCreateView(Fragment.java:2354)
                                                       at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1419)
                                                       at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1740)
                                                       at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:794)
                                                       at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2580)
                                                       at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2367)
                                                       at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2322)
                                                       at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2229)
                                                       at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3221)
                                                       at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3171)
                                                       at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:192)
                                                       at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:560)
                                                       at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
                                                       at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1188)
                                                       at android.app.Activity.performStart(Activity.java:5241)
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2166)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2243) 
                                                       at android.app.ActivityThread.access$800(ActivityThread.java:135) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                       at android.os.Looper.loop(Looper.java:136) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5019) 
                                                       at java.lang.reflect.Method.invokeNative(Native Method) 
                                                       at java.lang.reflect.Method.invoke(Method.java:515) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
                                                       at dalvik.system.NativeStart.main(Native Method)