android启动就报错

开发环境idea-14,然后已经添加了v7目录下面的v4和v7包到项目的libs目录,并且添加到Libraries中.实在想不到是什么地方出问题了,等大神,谢谢

报错信息:

java.lang.NoClassDefFoundError: android.support.v7.appcompat.R$styleable
            at android.support.v7.app.DrawerArrowDrawable.<init>(DrawerArrowDrawable.java:64)
            at android.support.v7.app.ActionBarDrawerToggle$DrawerArrowDrawableToggle.<init>(ActionBarDrawerToggle.java:469)
            at android.support.v7.app.ActionBarDrawerToggle.<init>(ActionBarDrawerToggle.java:222)
            at android.support.v7.app.ActionBarDrawerToggle.<init>(ActionBarDrawerToggle.java:150)
            at com.xxx.MainActivity$3.<init>(MainActivity.java:130)
            at com.xxx.MainActivity.onCreate(MainActivity.java:129)
            at android.app.Activity.performCreate(Activity.java:5231)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
            at android.app.ActivityThread.access$800(ActivityThread.java:135)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)

activity文件:

    mDrawerToggle = new ActionBarDrawerToggle(MainActivity.this, mDrawerLayout,
                R.string.drawer_open, R.string.drawer_close) {

            /** Called when a drawer has settled in a completely closed state. */
            public void onDrawerClosed(View view) {
                super.onDrawerClosed(view);
                getActionBar().setTitle("oncreate close");
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }

            /** Called when a drawer has settled in a completely open state. */
            public void onDrawerOpened(View drawerView) {
                super.onDrawerOpened(drawerView);
                getActionBar().setTitle("oncreate open");
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }
        };
        	mDrawerLayout.setDrawerListener(mDrawerToggle);

styles.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="AnimationFade">
        <!-- PopupWindow left right tanchu xiaoguo. -->
        <item name="android:windowEnterAnimation">
            @anim/in_lefttoright
        </item>
        <item name="android:windowExitAnimation">
            @anim/out_righttoleft
        </item>
    </style>
</resources>

androidmanifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.xxxxxx"
          android:versionCode="1"
          android:versionName="1.1">
    <uses-sdk android:minSdkVersion="10"
              android:targetSdkVersion="21"
            />
    <uses-permission android:name="android.permission.INTERNET"/>

    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
        <activity android:name="com.xxx.MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>