debug运行后，在初始化的setContentView(R.layout.activity_mlogin);方法出现如下错误：
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.medex.Activity.release/com.medex.Activity.miha.MLoginActivity}: java.lang.NullPointerException: Attempt to read from field 'android.os.MessageQueue android.os.Looper.mQueue' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2793)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2864)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
Caused by: java.lang.NullPointerException: Attempt to read from field 'android.os.MessageQueue android.os.Looper.mQueue' on a null object reference
at android.os.Handler.<init>(Handler.java:236)
at android.view.accessibility.AccessibilityManager$MyHandler.<init>(AccessibilityManager.java:686)
at android.view.accessibility.AccessibilityManager.<init>(AccessibilityManager.java:221)
at android.view.accessibility.AccessibilityManager.getInstance(AccessibilityManager.java:205)
at android.view.View.setFlags(View.java:11440)
at android.view.ViewGroup.initViewGroup(ViewGroup.java:590)
at android.view.ViewGroup.<init>(ViewGroup.java:579)
at android.view.ViewGroup.<init>(ViewGroup.java:574)
at android.view.ViewGroup.<init>(ViewGroup.java:570)
at android.view.ViewGroup.<init>(ViewGroup.java:566)
at android.widget.FrameLayout.<init>(FrameLayout.java:78)
at com.android.internal.policy.DecorView.<init>(DecorView.java:247)
at com.android.internal.policy.PhoneWindow.generateDecor(PhoneWindow.java:2401)
at com.android.internal.policy.PhoneWindow.installDecor(PhoneWindow.java:2804)
at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:443)
at com.android.internal.policy.HwPhoneWindow.setContentView(HwPhoneWindow.java:280)
at android.app.Activity.setContentView(Activity.java:2515)
at com.medex.Activity.Base.a.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:6910)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2746)
... 9 more
