未找到类Android支持设计小部件NavigationView

Question

美好的一天,你能帮助我吗？在模拟器上编译/运行我的代码时出现此错误.这是我过去的示例教程.我使用了最小的Target API - 15并编译了最新的gradle 'com.android.support:design:23.0.0'

http://www.android4devs.com/2015/06/navigation-view-material-design-support.html

代码错误:

AndroidRuntime:java.lang.RuntimeException:无法启动活动ComponentInfo {com.eccp.projects.ecosavers.ecosavers/com.eccp.projects.ecosavers.ecosavers.activities.MainActivity}:android.view.InflateException:二进制XML文件行# 29:二进制XML文件行#29:错误膨胀类android.support.design.widget.NavigationView 12-29 06:43:39.409 3448-3448/com.eccp.projects.ecosavers.ecosavers E/AndroidRuntime:at android.app .ActivityThread.performLaunchActivity(ActivityThread.java:2416)

E/AndroidRuntime: 引起:android.view.InflateException:二进制XML文件行#29:二进制XML文件行#29:错误膨胀类android.support.design.widget.NavigationView

这是我的代码: MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //SET my own toolbar
    toolbar = (Toolbar) findViewById(R.id.tool_bar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayShowHomeEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);

    mNavigationView = (NavigationView) findViewById(R.id.navigation_view);

    mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {

        @Override
        public boolean onNavigationItemSelected(MenuItem menuItem) {
            if (menuItem.isChecked()) menuItem.setChecked(false);
            else menuItem.setChecked(true);

            //Closing drawer on item click
            mDrawerlayout.closeDrawers();

            //Check to see which item was being clicked and perform appropriate action
            switch (menuItem.getItemId()) {


                //Replacing the main content with ContentFragment Which is our Inbox View;
                case R.id.events:
                    Toast.makeText(getApplicationContext(), "Inbox Selected", Toast.LENGTH_SHORT).show();
                    Eco_events fragment = new Eco_events();
                    android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
                    fragmentTransaction.replace(R.id.frame, fragment);
                    fragmentTransaction.commit();
                    return true;

                //  show a toast on click

                case R.id.activities:
                    Toast.makeText(getApplicationContext(), "Send Selected", Toast.LENGTH_SHORT).show();
                    return true;
                case R.id.spam:
                    Toast.makeText(getApplicationContext(), "Spam Selected", Toast.LENGTH_SHORT).show();
                    return true;
                default:
                    Toast.makeText(getApplicationContext(), "Somethings Wrong", Toast.LENGTH_SHORT).show();
                    return true;

            }
        }
    });

    // Initializing Drawer Layout and ActionBarToggle
    mDrawerlayout = (DrawerLayout) findViewById(R.id.drawer);
    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerlayout, toolbar, R.string.drawerOpened, R.string.drawerOpened) {

        @Override
        public void onDrawerClosed(View drawerView) {
            // Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
            super.onDrawerClosed(drawerView);
        }

        @Override
        public void onDrawerOpened(View drawerView) {
            // Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
            super.onDrawerOpened(drawerView);
        }
    };

    //Setting the actionbarToggle to drawer layout
    mDrawerlayout.setDrawerListener(mDrawerToggle);

    //calling sync state is
    mDrawerToggle.syncState();


}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    return super.onOptionsItemSelected(item);
}

XML:activity_main.xml

<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">

<LinearLayout
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:orientation="vertical"
    >
    <include
        android:id="@+id/tool_bar"
        layout="@layout/toolbar"
        />
    <FrameLayout
        android:id="@+id/frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </FrameLayout>
</LinearLayout>
<android.support.design.widget.NavigationView
    android:id="@+id/navigation_view"
    android:layout_height="match_parent"
    android:layout_width="wrap_content"
    android:layout_gravity="start"
    app:headerLayout="@layout/header"
    app:menu="@menu/drawer"
    /> </android.support.v4.widget.DrawerLayout>

Answer 1

请遵循以下步骤:

1. 右键点击你的Project->Open Module Settings.
2. 然后打开Dependencies选项卡.
3. 单击+符号,然后选择Library Dependency.You将显示一个名为Choose Library Dependency的弹出窗口.
4. 输入"com.android.support".然后单击搜索图标.

5. 现在选择设计库.然后单击"确定".

Answer 2

您收到此错误是因为您需要设计支持库。

打开 SDK Manager 并下载 Android 支持存储库，您可以在此处找到该库的最新版本：

<android-sdk>/extras/android/m2repository/com/android/support/design/23.0.1/design-23.0.1.aar

将其复制到您的 libs 目录中，然后将依赖项添加到您的 build.gradle 中：

repositories {
    flatDir {
        dirs 'libs'
    }
}

dependencies {
    compile 'android.support.design:design:23.0.1@aar'
}