android - 没有 AppCompatActivity 的 Fragments 中的工具栏

问题描述

我不能在我的 MainActivity 中使用工具栏，因为它扩展了 FragmentActivity，所以我试图把它放在我的 Fragment 类中：

 @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(br.com.app.coffeehour.coffee_hour.R.layout.fragment1_menu, container, false);

    mToolbar = (Toolbar) view.findViewById(R.id.toolbar);
    if (mToolbar != null) {
        ((AppCompatActivity)getActivity()).setSupportActionBar(mToolbar);
    }
    mToolbar.setTitle(null);

    return view;
}

我也尝试了 ActionBarActivity 但它也没有奏效。

这是异常消息：

java.lang.RuntimeException: Unable to start activity ComponentInfo{br.com.app.coffeehour.coffeehour.app/br.com.app.coffeehour.coffee_hour.navigation.ActivityOne}: java.lang.ClassCastException: br.com.app.coffeehour.coffee_hour.navigation.ActivityOne cannot be cast to android.support.v7.app.AppCompatActivity
                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
                  at android.app.ActivityThread.-wrap11(Unknown Source:0)
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
                  at android.os.Handler.dispatchMessage(Handler.java:106)
                  at android.os.Looper.loop(Looper.java:164)
                  at android.app.ActivityThread.main(ActivityThread.java:6494)
                  at java.lang.reflect.Method.invoke(Native Method)
                  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
               Caused by: java.lang.ClassCastException: br.com.app.coffeehour.coffee_hour.navigation.ActivityOne cannot be cast to android.support.v7.app.AppCompatActivity
                  at br.com.app.coffeehour.coffee_hour.navigation.top_menu.fragment1_menu.onCreateView(fragment1_menu.java:33)
                  at android.support.v4.app.Fragment.performCreateView(Fragment.java:2442)
                  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1460)
                  at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
                  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
                  at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:802)
                  at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
                  at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
                  at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
                  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
                  at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3273)
                  at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3229)
                  at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:201)
                  at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:620)
                  at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1334)
                  at android.app.Activity.performStart(Activity.java:7029)

标签： androidandroid-fragmentsandroid-toolbar

android - 没有 AppCompatActivity 的 Fragments 中的工具栏

问题描述

解决方案

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