Ich bin absoluter Anfänger für Android. Ich fange an zu lernen, wie man die Aktionsleiste in Android sehr gut mit der Navigationsleiste benutzt. Ich habe bereits eine einfache App mit dem Layout android.support.v4.widget.DrawerLayout in der XML-Datei erstellt.

s hat gut funktioniert. Aber wenn ich @ benutandroid.support.v7.widget.DrawerLayout stattdessen wird ein Fehler ausgelöst. Was ist mit meinem Code nicht in Ordnung und wie kann ich ihn reparieren? Aber als ich es wieder in android.support.v4.widget.DrawerLayout geändert habe, funktioniert es einwandfrei.

Dies ist meine activity_main.xml

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

<android.support.v7.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- This LinearLayout represents the contents of the screen  -->

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

        <!-- The ActionBar displayed at the top -->
        <include
            layout="@layout/action_bar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <!-- The main content view where fragments are loaded -->
        <FrameLayout
            android:id="@+id/main_content"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </LinearLayout>

    <!-- The navigation drawer that comes from the left -->
    <!-- Note that `android:layout_gravity` needs to be set to 'start' -->
    <android.support.design.widget.NavigationView
        android:id="@+id/nvView"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@android:color/white"/>
        <!--app:headerLayout="@layout/nav_header"
        app:menu="@menu/drawer_view" />-->

</android.support.v7.widget.DrawerLayout> 

Dies ist die action_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:android="http://schemas.android.com/apk/res/android">

</android.support.v7.widget.Toolbar>

Dies ist meine MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Dies sind die Fehler in logcat, wenn ich es starte

01-29 11:22:43.026 20642-20642/? D/dalvikvm: Late-enabling CheckJNI
01-29 11:22:43.118 20642-20642/com.blog.waiyanhein.llks.llks W/dalvikvm: VFY: unable to find class referenced in signature (Landroid/view/SearchEvent;)
01-29 11:22:43.122 20642-20642/com.blog.waiyanhein.llks.llks I/dalvikvm: Could not find method android.view.Window$Callback.onSearchRequested, referenced from method android.support.v7.view.WindowCallbackWrapper.onSearchRequested
01-29 11:22:43.122 20642-20642/com.blog.waiyanhein.llks.llks W/dalvikvm: VFY: unable to resolve interface method 17962: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z
01-29 11:22:43.122 20642-20642/com.blog.waiyanhein.llks.llks D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002
01-29 11:22:43.122 20642-20642/com.blog.waiyanhein.llks.llks I/dalvikvm: Could not find method android.view.Window$Callback.onWindowStartingActionMode, referenced from method android.support.v7.view.WindowCallbackWrapper.onWindowStartingActionMode
01-29 11:22:43.122 20642-20642/com.blog.waiyanhein.llks.llks W/dalvikvm: VFY: unable to resolve interface method 17966: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode;
01-29 11:22:43.122 20642-20642/com.blog.waiyanhein.llks.llks D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002
01-29 11:22:43.190 20642-20642/com.blog.waiyanhein.llks.llks D/AndroidRuntime: Shutting down VM
01-29 11:22:43.190 20642-20642/com.blog.waiyanhein.llks.llks W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0xa617d908)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime: FATAL EXCEPTION: main
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.blog.waiyanhein.llks.llks/com.blog.waiyanhein.llks.llks.MainActivity}: android.view.InflateException: Binary XML file line #3: Error inflating class android.support.v7.widget.DrawerLayout
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.access$600(ActivityThread.java:141)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:99)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5041)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:511)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:  Caused by: android.view.InflateException: Binary XML file line #3: Error inflating class android.support.v7.widget.DrawerLayout
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:698)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at com.blog.waiyanhein.llks.llks.MainActivity.onCreate(MainActivity.java:15)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.Activity.performCreate(Activity.java:5104)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.access$600(ActivityThread.java:141) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:99) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5041) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:511) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:  Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.widget.DrawerLayout" on path: /data/app/com.blog.waiyanhein.llks.llks-2.apk
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.createView(LayoutInflater.java:552)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.inflate(LayoutInflater.java:466) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at com.blog.waiyanhein.llks.llks.MainActivity.onCreate(MainActivity.java:15) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.Activity.performCreate(Activity.java:5104) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.access$600(ActivityThread.java:141) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:99) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5041) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:511) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
01-29 11:22:43.210 20642-20642/com.blog.waiyanhein.llks.llks E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method) 

Was stimmt nicht mit meinem Code?