Question

我正在尝试在我的应用程序上添加DrawerLayout，但是项目对点击没有响应。我已经尝试在控制台上记录输出，但是单击项目时什么也没有显示。这是我的代码

MainActivity

public class DashboardActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

Toolbar toolbar;
DrawerLayout drawerLayout;
NavigationView navigationView;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_navigation_drawal);
 drawerLayout = (DrawerLayout) findViewById(R.id.drawal_layout);
    navigationView = (NavigationView) findViewById(R.id.navigation_view);


    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_drawer,R.string.close_drawer);
    drawerLayout.addDrawerListener(toggle);
    toggle.syncState();
   @Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
    int id = item.getItemId();
    Log.i("info", String.valueOf(id));
    switch (id){

        case R.id.dashoard:
            Toast.makeText(DashboardActivity.this, "This is dasbhard", Toast.LENGTH_SHORT).show();
        case R.id.hire_mechanic_id:
            Intent intents = new Intent(DashboardActivity.this, LIkelyProblemsActivity.class);
            startActivity(intents);
            break;

        case R.id.tow_van_id:
            Toast.makeText(getApplicationContext(),"Hire a Toyin Van", Toast.LENGTH_LONG).show();
            break;

    }

    drawerLayout.closeDrawer(Gravity.START);
    return true;
}

}

DrawerLayout

 <?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="match_parent">

    <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/drawal_layout"
        android:fitsSystemWindows="false"
        tools:openDrawer="start">

        <include layout="@layout/activity_dashboard" />

        <android.support.design.widget.NavigationView
            android:layout_width="wrap_content"
            android:id="@+id/navigation_view"
            android:layout_gravity="start"
            android:fitsSystemWindows="false"
            android:layout_height="match_parent"
            android:layout_marginTop="?attr/actionBarSize"
            app:headerLayout="@layout/activity_navigation_header"
            app:menu="@menu/navigation_menu"/>

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

</RelativeLayout>

item.xml

<item android:title="Dashboard">
    <menu>
        <item
            android:title="item 1"
            android:icon="@drawable/mechanic"
            android:id="@+id/dashoard"/>
        <item
            android:title="item 2"
            android:icon="@drawable/mechanic"
            android:id="@+id/hire_mechanic_id"/>

        <item
            android:title="item 3"
            android:icon="@drawable/spareparts"
            android:id="@+id/spare_parts_id"/>

        <item

            android:title="item 4"
            android:id="@+id/tow_van_id"
            android:icon="@drawable/toyin_van" />
    </menu>
   </item>
</menu>

我已经检查了抽屉布局，菜单和主要活动，但是我无法真正弄清楚问题出在哪里。任何可以帮助我的人。

Answer 1

您忘记调用navigationView.setNavigationItemSelectedListener侦听器，这就是为什么不调用导航项的原因，只需添加此行

navigationView = (NavigationView) findViewById(R.id.navigation_view);
navigationView.setNavigationItemSelectedListener(this)

希望它将对您有帮助！

打开和关闭DrawerLayout null异常

1 个答案: