Android Studio 2.0 Instant Run问题 不支持API Level 21（Android 5.0）以下机型
错误日志：
AndroidRuntime: FATAL EXCEPTION: main
Process: com.efamily.platform, PID: 26372
Java.lang.RuntimeException: Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication: java.lang.ClassNotFoundException: Didn't find class "com.android.tools.fd.runtime.BootstrapApplication" on path: DexPathList[[zip file "/data/app/com.efamily.platform-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.efamily.platform-1, /vendor/lib, /system/lib]]
at android.app.LoadedApk.makeApplication(LoadedApk.java:518)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4569)
at android.app.ActivityThread.access$1500(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1407)
at android.os.Handler.dispatchMessage(Handler.java:110)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5349)
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:835)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:651)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.android.tools.fd.runtime.BootstrapApplication" on path: DexPathList[[zip file "/data/app/com.efamily.platform-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.efamily.platform-1, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
at android.app.Instrumentation.newApplication(Instrumentation.java:975)
at android.app.LoadedApk.makeApplication(LoadedApk.java:513)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4569)
at android.app.ActivityThread.access$1500(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1407)
at android.os.Handler.dispatchMessage(Handler.java:110)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5349)
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:835)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:651)
at dalvik.system.NativeStart.main(Native Method)
真机：红米note1,安卓4.1版本
解决方法:打开Android studio设置
去掉勾选的选项:
这样在真机5.0以下就能运行........