android - Bearded-Hen/Android-Bootstrap ドロップダウン

Question

ブートストラップ ドロップダウンが挿入されたときにアプリが停止しました。コードセクションで利用可能なビットを使用しました。ボタンラベルなどは機能していますが、挿入するとドロップダウンアプリが停止しました

丸太猫

11-21 11:28:30.219 10128-10128/com.example.usr1.myapplication E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.usr1.myapplication, PID: 10128
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.usr1.myapplication/com.example.usr1.myapplication.feature.MainActivity}: android.view.InflateException: Binary XML file line #0: 
Binary XML file line #0: Error inflating class com.beardedhen.androidbootstrap.BootstrapDropDown
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
    at android.app.ActivityThread.-wrap11(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
    at android.os.Handler.dispatchMessage(Handler.java:105)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6541)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class  com.beardedhen.androidbootstrap.BootstrapDropDown
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class com.beardedhen.androidbootstrap.BootstrapDropDown
Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.newInstance0(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
    at android.view.LayoutInflater.createView(LayoutInflater.java:647)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:286)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
    at  com.example.usr1.myapplication.feature.MainActivity.onCreate(MainActivity.java:30)
    at android.app.Activity.performCreate(Activity.java:6975)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
    at android.app.ActivityThread.-wrap11(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
    at android.os.Handler.dispatchMessage(Handler.java:105)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6541)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: java.lang.IllegalArgumentException: text cannot be null
    at android.graphics.Paint.measureText(Paint.java:1856)
    at com.beardedhen.androidbootstrap.BootstrapDropDown.measureStringWidth(BootstrapDropDown.java:294)
    at com.beardedhen.androidbootstrap.BootstrapDropDown.createDropDown(BootstrapDropDown.java:158)
    at com.beardedhen.androidbootstrap.BootstrapDropDown.initialise(BootstrapDropDown.java:140)
    at com.beardedhen.androidbootstrap.BootstrapDropDown.(BootstrapDropDown.java:87)