Android Studio 使用过程遇到的error（NoCl

与超过64K的方法来配置应用程序

07-19 18:20:29.491 11778-11778/com.example.hante.newpro E/AndroidRuntime: FATAL EXCEPTION: main
                                                                          Process: com.example.hante.newpro, PID: 11778
                                                                          java.lang.NoClassDefFoundError: android.support.v4.app.NavUtilsJB
                                                                              at android.support.v4.app.NavUtils$NavUtilsImplJB.getParentActivityName(NavUtils.java:125)
                                                                              at android.support.v4.app.NavUtils.getParentActivityName(NavUtils.java:302)
                                                                              at android.support.v4.app.NavUtils.getParentActivityName(NavUtils.java:281)
                                                                              at android.support.v7.app.AppCompatDelegateImplV7.onCreate(AppCompatDelegateImplV7.java:152)
                                                                              at android.support.v7.app.AppCompatDelegateImplV14.onCreate(AppCompatDelegateImplV14.java:46)
                                                                              at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:73)
                                                                              at com.example.hante.newpro.MainActivity2.onCreate(MainActivity2.java:150)
                                                                              at android.app.Activity.performCreate(Activity.java:5245)
                                                                              at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
                                                                              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2153)
                                                                              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2238)
                                                                              at android.app.ActivityThread.access$800(ActivityThread.java:138)
                                                                              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1201)
                                                                              at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                              at android.os.Looper.loop(Looper.java:136)
                                                                              at android.app.ActivityThread.main(ActivityThread.java:5016)
                                                                              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:792)
                                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
                                                                              at dalvik.system.NativeStart.main(Native Method)

解决步骤：
1.You need to add the following to your gradle file dependencies:

compile 'com.android.support:multidex:1.0.0'

2.Also enable multidex output in your gradle file:

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.0"

    defaultConfig {
        ...
        minSdkVersion 14
        targetSdkVersion 21
        ...

        // Enabling multidex support.
        multiDexEnabled true
    }
}

3.And then add the multidex support application to your manifest:

 <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android.multidex.myapplication">
    <application
        ...
        android:name="android.support.multidex.MultiDexApplication">
        ...
    </application>
</manifest>

重新编译就ok
参考：Android 文档 https://developer.android.com/studio/build/multidex.html
及
http://stackoverflow.com/questions/28298453/android-studio-java-lang-noclassdeffounderror-android-support-v4-app-navutilsjb