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参考：

问题：

--------- beginning of crash05-23 18:36:40.164 3557-3557/com.lidan.xiao.danquestion E/AndroidRuntime: FATAL EXCEPTION: main    Process: com.lidan.xiao.danquestion, PID: 3557    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.lidan.xiao.danquestion/com.lidan.xiao.danquestion.activity.QuestionActivity}: android.view.InflateException: Binary XML file line #10: Error inflating class 
   
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2327)        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)        at android.app.ActivityThread.access$800(ActivityThread.java:153)        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305)        at android.os.Handler.dispatchMessage(Handler.java:102)        at android.os.Looper.loop(Looper.java:135)        at android.app.ActivityThread.main(ActivityThread.java:5293)        at java.lang.reflect.Method.invoke(Native Method)        at java.lang.reflect.Method.invoke(Method.java:372)        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)     Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class 
    
             at android.view.LayoutInflater.createView(LayoutInflater.java:633)        at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)        at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)        at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)        at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)        at android.view.LayoutInflater.inflate(LayoutInflater.java:504)        at android.view.LayoutInflater.inflate(LayoutInflater.java:414)        at android.view.LayoutInflater.inflate(LayoutInflater.java:365)        at com.lidan.xiao.danquestion.activity.QuestionActivity.createView(QuestionActivity.java:176)        at com.lidan.xiao.danquestion.activity.QuestionActivity.access$300(QuestionActivity.java:39)        at com.lidan.xiao.danquestion.activity.QuestionActivity$2.getView(QuestionActivity.java:168)        at android.widget.AdapterViewAnimator.showOnly(AdapterViewAnimator.java:548)        at android.widget.AdapterViewAnimator.setAdapter(AdapterViewAnimator.java:971)        at android.widget.AdapterViewFlipper.setAdapter(AdapterViewFlipper.java:144)        at com.lidan.xiao.danquestion.activity.QuestionActivity.initView(QuestionActivity.java:172)        at com.lidan.xiao.danquestion.activity.QuestionActivity.onCreate(QuestionActivity.java:72)        at android.app.Activity.performCreate(Activity.java:5990)        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2280)        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)         at android.app.ActivityThread.access$800(ActivityThread.java:153)         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305)         at android.os.Handler.dispatchMessage(Handler.java:102)         at android.os.Looper.loop(Looper.java:135)         at android.app.ActivityThread.main(ActivityThread.java:5293)         at java.lang.reflect.Method.invoke(Native Method)         at java.lang.reflect.Method.invoke(Method.java:372)         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)      Caused by: java.lang.reflect.InvocationTargetException        at java.lang.reflect.Constructor.newInstance(Native Method)        at java.lang.reflect.Constructor.newInstance(Constructor.java:288)        at android.view.LayoutInflater.createView(LayoutInflater.java:607)        at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)         at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)         at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)         at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)         at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)         at android.view.LayoutInflater.inflate(LayoutInflater.java:504)         at android.view.LayoutInflater.inflate(LayoutInflater.java:414)         at android.view.LayoutInflater.inflate(LayoutInflater.java:365)         at com.lidan.xiao.danquestion.activity.QuestionActivity.createView(QuestionActivity.java:176)         at com.lidan.xiao.danquestion.activity.QuestionActivity.access$300(QuestionActivity.java:39)         at com.lidan.xiao.danquestion.activity.QuestionActivity$2.getView(QuestionActivity.java:168)         at android.widget.AdapterViewAnimator.showOnly(AdapterViewAnimator.java:548)         at android.widget.AdapterViewAnimator.setAdapter(AdapterViewAnimator.java:971)         at android.widget.AdapterViewFlipper.setAdapter(AdapterViewFlipper.java:144)         at com.lidan.xiao.danquestion.activity.QuestionActivity.initView(QuestionActivity.java:172)         at com.lidan.xiao.danquestion.activity.QuestionActivity.onCreate(QuestionActivity.java:72)         at android.app.Activity.performCreate(Activity.java:5990)         at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2280)         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)         at android.app.ActivityThread.access$800(ActivityThread.java:153)         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305)         at android.os.Handler.dispatchMessage(Handler.java:102)         at android.os.Looper.loop(Looper.java:135)         at android.app.ActivityThread.main(ActivityThread.java:5293)         at java.lang.reflect.Method.invoke(Native Method)         at java.lang.reflect.Method.invoke(Method.java:372)         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)      Caused by: android.content.res.Resources$NotFoundException: Resource "android:style/Widget.Material.Light.ProgressBar.Horizontal" (10302b8)  is not a Drawable (color or path): TypedValue{t=0x1/d=0x10302b8 a=-1 r=0x10302b8}        at android.content.res.Resources.loadDrawableForCookie(Resources.java:2441)        at android.content.res.Resources.loadDrawable(Resources.java:2381)        at android.content.res.TypedArray.getDrawable(TypedArray.java:749)        at android.widget.ProgressBar.
     
      (ProgressBar.java:267)        at android.widget.ProgressBar.
      
       (ProgressBar.java:253)        at android.widget.ProgressBar.
       
        (ProgressBar.java:249)        at java.lang.reflect.Constructor.newInstance(Native Method)         at java.lang.reflect.Constructor.newInstance(Constructor.java:288)         at android.view.LayoutInflater.createView(LayoutInflater.java:607)         at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:55)         at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)         at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)         at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)         at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)         at android.view.LayoutInflater.inflate(LayoutInflater.java:504)         at android.view.LayoutInflater.inflate(LayoutInflater.java:414)         at android.view.LayoutInflater.inflate(LayoutInflater.java:365)         at com.lidan.xiao.danquestion.activity.QuestionActivity.createView(QuestionActivity.java:176)         at com.lidan.xiao.danquestion.activity.QuestionActivity.access$300(QuestionActivity.java:39)         at com.lidan.xiao.danquestion.activity.QuestionActivity$2.getView(QuestionActivity.java:168)         at android.widget.AdapterViewAnimator.showOnly(AdapterViewAnimator.java:548)         at android.widget.AdapterViewAnimator.setAdapter(AdapterViewAnimator.java:971)         at android.widget.AdapterViewFlipper.setAdapter(AdapterViewFlipper.java:144)         at com.lidan.xiao.danquestion.activity.QuestionActivity.initView(QuestionActivity.java:172)         at com.lidan.xiao.danquestion.activity.QuestionActivity.onCreate(QuestionActivity.java:72)         at android.app.Activity.performCreate(Activity.java:5990)         at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2280)         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)         at android.app.ActivityThread.access$800(ActivityThread.java:153)         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305)         at android.os.Handler.dispatchMessage(Handler.java:102)         at android.os.Looper.loop(Looper.java:135)         at android.app.ActivityThread.main(ActivityThread.java:5293)         at java.lang.reflect.Method.invoke(Native Method)         at java.lang.reflect.Method.invoke(Method.java:372)         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
       
      
     
    
   

QuestionActivity.java:176)对应的是

root = LayoutInflater.from(QuestionActivity.this).inflate(R.layout.queitem, null);

从而看出是queitem.xml中问题，这个文件有两个（一般和V21,SDK5.0）。在其中搜Widget.Material.Light.ProgressBar.Horizontal。(V21中存在)

这句话android:progressDrawable="@android:style/Widget.Material.Light.ProgressBar.Horizontal"为什么会报错呢？

之前能用，现在不能，应该是android新旧版本不兼容bug。网上正确用法如下。

解决：

原因：为什么没有模拟器没有报错  是因为API19不会去引用这个布局所以不会报错

原代码：

改为

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