在DrawerLayout使用NavigationView后程序闪退，求帮助;

qq_37546625 2018-07-21 07:51:43

在DrawerLayout使用NavigationView后程序闪退，但是用TextView就正常了

public class DesignActivity extends AppCompatActivity {



    private DrawerLayout mDrawerLayout;

    

    private NavigationView mNavView;

    

    private Toolbar toolbar;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_design); //在这里报错

        toolbar = findViewById(R.id.toolbar);

        setSupportActionBar(toolbar);

        mDrawerLayout = findViewById(R.id.drawer_layout);

        mNavView = findViewById(R.id.nav_view);

        ActionBar actionBar = getSupportActionBar();

        if (actionBar != null){

            actionBar.setDisplayHomeAsUpEnabled(true);

            actionBar.setHomeAsUpIndicator(R.drawable.od_menu);

        }

       mNavView.setCheckedItem(R.id.nav_call);

        mNavView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {

            @Override

            public boolean onNavigationItemSelected(@NonNull MenuItem item) {

                mDrawerLayout.closeDrawers();

                return true;

            }

        });

    }



    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.toolbar, menu);

        return true;

    }



    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()){

            case R.id.backup:

                ToastUtil.showMsg(this, "You clicked Backup");

                break;

            case R.id.delete:

                ToastUtil.showMsg(this, "You clicked Delete");

                break;

            case R.id.settings:

                ToastUtil.showMsg(this, "You clicked Setting");

                break;

            case android.R.id.home:

                mDrawerLayout.openDrawer(GravityCompat.START);

                break;



            default:

                break;

        }

        return true;

    }

}

页面布局文件

<?xml version="1.0" encoding="utf-8"?>

<android.support.v4.widget.DrawerLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/drawer_layout"

    android:layout_width="match_parent"

    android:layout_height="match_parent">



    <FrameLayout

        android:layout_width="match_parent"

        android:layout_height="match_parent">



        <android.support.v7.widget.Toolbar

            android:id="@+id/toolbar"

            android:layout_width="match_parent"

            android:layout_height="?attr/actionBarSize"

            android:background="?attr/colorPrimary"

            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"

            app:popupTheme="@style/AlertDialog.AppCompat.Light"/>



    </FrameLayout>



    <android.support.design.widget.NavigationView

        android:id="@+id/nav_view"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        app:menu="@menu/nav_menu"

        android:layout_gravity="start"

        app:headerLayout="@layout/nav_header"/>





</android.support.v4.widget.DrawerLayout>

如果把NavigetionView中的layout_gravity="start"去掉后可以看到

menu的xml文件

<?xml version="1.0" encoding="utf-8"?>

<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <group android:checkableBehavior="single">

        <item

            android:id="@+id/nav_call"

            android:icon="@drawable/call"

            android:title="Call"/>



        <item

            android:id="@+id/nav_friends"

            android:icon="@drawable/firend"

            android:title="Friends"/>



        <item

            android:id="@+id/nav_location"

            android:icon="@drawable/location"

            android:title="Location"/>



        <item

            android:id="@+id/nav_mail"

            android:icon="@drawable/mail"

            android:title="Mail"/>



        <item

            android:id="@+id/nav_task"

            android:icon="@drawable/task"

            android:title="Tasks"/>

    </group>

</menu>

nav_header的xml文件

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="180dp"

    android:padding="10dp"

    android:background="?attr/colorPrimary">



    <android.support.v4.widget.CircleImageView

        android:id="@+id/icon_image"

        android:layout_width="70dp"

        android:layout_height="70dp"

        android:src="@drawable/panda"

        android:layout_centerInParent="true"/>



    <TextView

        android:id="@+id/username"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_above="@+id/mail"

        android:text="Tony Green"

        android:textColor="#FFF"

        android:textSize="14sp"/>



    <TextView

        android:id="@+id/mail"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:text="tonygreendev@mail.com"

        android:textColor="#FFF"

        android:textSize="14sp"/>



</RelativeLayout>

最后Log奉上求大神相助
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.helloworld, PID: 10420
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.helloworld/com.example.helloworld.materialdesign.DesignActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.NavigationView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2488)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2548)
at android.app.ActivityThread.access$1100(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1399)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5613)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.NavigationView
at android.view.LayoutInflater.inflate(LayoutInflater.java:543)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at com.example.helloworld.materialdesign.DesignActivity.onCreate(DesignActivity.java:28)
at android.app.Activity.performCreate(Activity.java:6362)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2441)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2548)
at android.app.ActivityThread.access$1100(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1399)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5613)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)

...全文