如何修复“inflating类Android.Support.Design.Widget.NavigationView的错误”

Question

我想创建应用程序，其中NavigationView和底部导航相互工作，但在输出中，我在“Run”中得到了下一个字符串

.

 <?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" >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/fragment_container"
        android:layout_above="@id/nav_bar"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical" >

            <include
                layout="@layout/toolbar_main"
                android:id="@+id/toolbar" />

            <FrameLayout
                android:id="@+id/content_frame"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />

        </LinearLayout>

        <android.support.design.widget.BottomNavigationView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:id="@+id/nav_bar"
            app:menu="@menu/bottom_navigation"
            android:background="@color/colorWhite"/>

        <android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            app:headerLayout="@layout/nav_header"
            app:menu="@menu/toolbar_menu" />

    </RelativeLayout>


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

import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.design.widget.NavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        BottomNavigationView bottomNavigationView = (BottomNavigationView) findViewById(R.id.nav_bar);
        bottomNavigationView.setOnNavigationItemSelectedListener(navListener);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this,
                drawer,
                toolbar,
                R.string.nav_open_drawer,
                R.string.nav_close_drawer);
        drawer.addDrawerListener(toggle);
        toggle.syncState();
        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener((NavigationView.OnNavigationItemSelectedListener) this);
        Fragment fragment = new AimsFragment();
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.add(R.id.content_frame, fragment);
        ft.commit();;
    }
 private BottomNavigationView.OnNavigationItemSelectedListener navListener =
         new BottomNavigationView.OnNavigationItemSelectedListener() {
             @Override
             public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                 Fragment selectedFragment = null;
                 switch (item.getItemId()){
                     case R.id.nav_veri:
                         selectedFragment = new AimsFragment();
                         break;
                     case R.id.nav_diary:
                         selectedFragment = new DiaryFragment();
                         break;
                     case R.id.nav_appoint:
                         selectedFragment = new CalendarFragment();
                         break;
             }

             getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,selectedFragment).commit();
        return true;
         }

};

    public boolean onNavigationItemSelected(MenuItem item) {
        int id = item.getItemId();
        Fragment fragment = null;
        Intent intent = null;
        switch(id){
            case R.id.nav_aims:
                fragment = new AimsFragment();
                break;
            case R.id.nav_reminder:
                fragment = new ReminderFragment();
                break;
            case R.id.nav_statics:
                fragment = new StaticsFragment();
                break;
            case R.id.nav_schedule:
                fragment = new ScheduleFragment();
                break;
            case R.id.nav_project:
                fragment = new ProjectFragment();
                break;
            case R.id.nav_settings:
                fragment = new SettingsFragment();
                break;
            case R.id.nav_info:
                fragment = new InfoFragment();
                break;
            default:
                fragment = new AimsFragment();
        }
        if (fragment != null) {
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.replace(R.id.content_frame, fragment);
            ft.commit();
        } else {
            startActivity(intent);
        }
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    }

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.mederov.timelord"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        }
    }
    buildToolsVersion '28.0.3'
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:support-v4:28.0.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:design:28.0.0'
}

菜单

<?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_aims"
            android:icon="@drawable/idea_aims"
            android:title="@string/nav_aims"
            android:checked="true" />
        <item
            android:id="@+id/nav_reminder"
            android:icon="@drawable/reminder"
            android:title="@string/nav_reminder" />
        <item
            android:id="@+id/nav_statics"
            android:icon="@drawable/statics"
            android:title="@string/nav_statics" />
        <item
            android:id="@+id/nav_schedule"
            android:icon="@drawable/scheldule"
            android:title="@string/nav_schedule" />
        <item
            android:id="@+id/nav_project"
            android:icon="@drawable/project"
            android:title="@string/nav_project" />
    </group>

        <menu>
            <item
                android:id="@+id/nav_settings"
                android:icon="@drawable/settings"
                android:title="@string/nav_settings" />
            <item
                android:id="@+id/nav_info"
                android:icon="@drawable/info"
                android:title="@string/nav_info"/>

        </menu>

</menu>

请帮帮我，我不知道如何修复这个错误）

Answer 1

我也有同样的错误，我修复了它。问题是vector图标中的vector只在api级别21+上工作，如果你试着在api 19上运行它--他的意志不适合你。