Java 试图设置进度（int）的NullPointerException

我的应用程序中有一个片段，它使用ProgressBar，圆圈。 我的片段是：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view =  inflater.inflate(R.layout.fragment_home,
            container, false);
    getActivity().setTitle(R.string.title_home);
    ProgressBar progressBar = (ProgressBar) view.findViewById(R.id.progressBar);
    progressBar.setProgress(100);
    return view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);


    TextView text = (TextView) getView().findViewById(R.id.textView);
    text.setText("TEST");
}

我试过使用

progressBar.setProgress（50）。但我还是得到了一个NullPointerException

日志：

FATAL EXCEPTION: main
  java.lang.RuntimeException: Unable to start activity ComponentInfo{stin1.ngt.nextgentelruter/stin1.ngt.nextgentelruter.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ProgressBar.setProgress(int)' on a null object reference
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
     at android.app.ActivityThread.access$800(ActivityThread.java:151)
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
     at android.os.Handler.dispatchMessage(Handler.java:102)
     at android.os.Looper.loop(Looper.java:135)
     at android.app.ActivityThread.main(ActivityThread.java:5254)
     at java.lang.reflect.Method.invoke(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:372)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
   Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ProgressBar.setProgress(int)' on a null object reference
     at stin1.ngt.nextgentelruter.HomeFragment.onCreateView(HomeFragment.java:56)
     at android.app.Fragment.performCreateView(Fragment.java:2053)
     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:894)
     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)
     at android.app.BackStackRecord.run(BackStackRecord.java:834)
     at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1452)
     at android.app.Activity.performStart(Activity.java:6005)
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2288)
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387) 
     at android.app.ActivityThread.access$800(ActivityThread.java:151) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5254) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372)

当我尝试在文本视图上设置文本时，它正在工作。为什么设置进度不起作用

XML:

非常感谢您的帮助
 根据您的布局，您的进度元素被标识为
custom\u progressBar
而不是
progressBar

尝试更改此选项：

ProgressBar progressBar = (ProgressBar) view.findViewById(R.id.progressBar);

为此：

ProgressBar progressBar = (ProgressBar) view.findViewById(R.id.custom_progressBar);

我刚想出来。糟糕，我需要睡一会儿。谢谢如果正确，请接受我的回答：）需要等待10分钟：）
ProgressBar progressBar = (ProgressBar) view.findViewById(R.id.progressBar);

ProgressBar progressBar = (ProgressBar) view.findViewById(R.id.custom_progressBar);