Java 当我使用ImageView时，我的应用程序在API 16-24上崩溃，但在API 25上工作

我的应用程序每次在带有

API16到24

的android模拟器上崩溃时都会出现错误“不幸的是，应用程序已停止”，但在使用ImageView时会在

API24

上运行。但是，当移除Imageview时，它可以正常工作。我需要这个项目的ImageView。我怎样才能解决这个问题？下面是我的xml代码：

活动\u main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:fitsSystemWindows="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<TextView
    android:id="@+id/note1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="60dp"
    android:contentDescription="@null"
    android:gravity="center"
    android:padding="8dp"
    android:text="@string/note1"
    android:textAppearance="@style/TextAppearance.AppCompat.Title"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintStart_toStartOf="@+id/guideline"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toTopOf="@id/note2"/>

<android.support.constraint.Guideline
    android:id="@+id/guideline"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_begin="20dp" />

<android.support.constraint.Guideline
    android:id="@+id/guideline2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_end="20dp" />

<TextView
    android:id="@+id/note2"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="@string/note2"
    android:layout_marginEnd="8dp"
    android:layout_marginTop="20dp"
    android:layout_marginStart="8dp"
    android:layout_marginBottom="16dp"
    android:gravity="center"
    android:padding="8dp"
    android:contentDescription="@null"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintStart_toStartOf="@+id/guideline"
    app:layout_constraintTop_toBottomOf="@id/note1"
    app:layout_constraintBottom_toTopOf="@+id/barrier"
    android:textAppearance="@style/TextAppearance.AppCompat.Title"

    />

<android.support.constraint.Barrier
    android:id="@+id/barrier"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:barrierDirection="bottom"
    app:constraint_referenced_ids="note1,note2"
    app:layout_constraintBottom_toBottomOf="@+id/logoimage"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<Button
    android:id="@+id/button"
    android:layout_width="0dp"
    android:layout_height="46dp"
    android:layout_marginBottom="50dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="16dp"
    android:background="@drawable/buttongradient"
    android:clickable="true"
    android:focusable="true"
    android:text="@string/button_name"
android:textAppearance="@style/TextAppearance.AppCompat.Widget.ActionBar.Menu"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintStart_toStartOf="@+id/guideline"
    app:layout_constraintTop_toBottomOf="@+id/barrier2" />

<android.support.constraint.Barrier
    android:id="@+id/barrier2"
    android:layout_width="wrap_content"
    android:layout_height="0dp"
    app:barrierDirection="top"
    app:constraint_referenced_ids="button"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
     />

<ImageView
    android:id="@+id/logoimage"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:contentDescription="@null"
    app:layout_constraintBottom_toTopOf="@+id/barrier2"
    app:layout_constraintEnd_toStartOf="@+id/guideline2"
    app:layout_constraintStart_toStartOf="@+id/guideline"
    app:layout_constraintTop_toBottomOf="@+id/barrier"
    app:srcCompat="@drawable/logo" />

</android.support.constraint.ConstraintLayout>

logcat

08-08 15:46:40.522 3506-3506/com.example.godwinacquah.ourstudybuddy W/ResourceType: Failure getting entry for 0x7f070097 (t=6 e=151) in package 0 (error -75)
Failure getting entry for 0x7f070097 (t=6 e=151) in package 0 (error -75)
08-08 15:46:40.522 3506-3506/com.example.godwinacquah.ourstudybuddy D/AndroidRuntime: Shutting down VM
08-08 15:46:40.522 3506-3506/com.example.godwinacquah.ourstudybuddy W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x9cd74b20)
08-08 15:46:40.532 3506-3506/com.example.godwinacquah.ourstudybuddy E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.godwinacquah.ourstudybuddy, PID: 3506
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.godwinacquah.ourstudybuddy/com.example.godwinacquah.ourstudybuddy.MainActivity}: android.view.InflateException: Binary XML file line #100: Error inflating class ImageView
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
    at android.app.ActivityThread.access$800(ActivityThread.java:135)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5017)
    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:779)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    at dalvik.system.NativeStart.main(Native Method)
 Caused by: android.view.InflateException: Binary XML file line #100: Error inflating class ImageView
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:714)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:756)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
    at com.example.godwinacquah.ourstudybuddy.MainActivity.onCreate(MainActivity.java:19)
    at android.app.Activity.performCreate(Activity.java:5231)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
    at android.app.ActivityThread.access$800(ActivityThread.java:135) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:136) 
    at android.app.ActivityThread.main(ActivityThread.java:5017) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    at dalvik.system.NativeStart.main(Native Method) 
 Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f070097
    at android.content.res.Resources.getValue(Resources.java:1123)
    at android.support.v7.widget.ResourcesWrapper.getValue(ResourcesWrapper.java:208)
    at android.support.v7.widget.AppCompatDrawableManager.loadDrawableFromDelegates(AppCompatDrawableManager.java:328)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:193)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:186)
    at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:100)
    at android.support.v7.widget.AppCompatImageHelper.loadFromAttributes(AppCompatImageHelper.java:58)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:77)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:67)
    at android.support.v7.app.AppCompatViewInflater.createImageView(AppCompatViewInflater.java:181)
    at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:105)
    at android.support.v7.app.AppCompatDelegateImplV9.createView(AppCompatDelegateImplV9.java:1035)
    at android.support.v7.app.AppCompatDelegateImplV9.onCreateView(AppCompatDelegateImplV9.java:1092)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:756) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287) 
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139) 
    at com.example.godwinacquah.ourstudybuddy.MainActivity.onCreate(MainActivity.java:19) 
    at android.app.Activity.performCreate(Activity.java:5231) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
    at android.app.ActivityThread.access$800(ActivityThread.java:135) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:136) 
    at android.app.ActivityThread.main(ActivityThread.java:5017) 
    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:779) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    at dalvik.system.NativeStart.main(Native Method) 
08-08 15:46:40.562 3506-3506/com.example.godwinacquah.ourstudybuddy D/dalvikvm: GC_FOR_ALLOC freed 328K, 11% free 3297K/3700K, paused 17ms, total 26ms
08-08 15:46:40.632 1629-3519/system_process D/dalvikvm: GC_FOR_ALLOC freed 2846K, 40% free 12585K/20720K, paused 70ms, total 71ms

08-08 15:46:40.5223506-3506/com.example.godwinacquah.ourstudybuddy W/ResourceType:获取包0中0x7f070097（t=6 e=151）的条目失败（错误-75）
获取包0中0x7f070097（t=6 e=151）的条目失败（错误-75）
08-08 15:46:40.5223506-3506/com.example.godwinacquah.ourstudybuddy D/AndroidRuntime:关闭虚拟机
08-08 15:46:40.5223506-3506/com.example.godwinacquah.ourstudybuddy W/dalvikvm:threadid=1:线程以未捕获异常退出（组=0x9cd74b20）
08-08 15:46:40.5323506-3506/com.example.godwinacquah.ourstudybuddy E/AndroidRuntime:致命异常：main
进程：com.example.godwinacquah.ourstudybuddy，PID:3506
java.lang.RuntimeException:无法启动活动组件信息{com.example.godwinacquah.ourstudybuddy/com.example.godwinacquah.ourstudybuddy.MainActivity}:android.view.InflateException:二进制XML文件行#100:膨胀类ImageView时出错
在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2195）上
位于android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2245）
在android.app.ActivityThread.access$800（ActivityThread.java:135）
在android.app.ActivityThread$H.handleMessage（ActivityThread.java:1196）上
位于android.os.Handler.dispatchMessage（Handler.java:102）
位于android.os.Looper.loop（Looper.java:136）
位于android.app.ActivityThread.main（ActivityThread.java:5017）
位于java.lang.reflect.Method.Invokenactive（本机方法）
位于java.lang.reflect.Method.invoke（Method.java:515）
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:779）上
位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:595）
在dalvik.system.NativeStart.main（本机方法）
原因：android.view.InflateException:二进制XML文件行#100:膨胀类ImageView时出错
位于android.view.LayoutInflater.createViewFromTag（LayoutInflater.java:714）
位于android.view.LayoutInflater.rInflate（LayoutInflater.java:756）
在android.view.LayoutInflater.inflate（LayoutInflater.java:492）
在android.view.LayoutInflater.inflate（LayoutInflater.java:397）
在android.view.LayoutInflater.充气（LayoutInflater.java:353）
在android.support.v7.app.AppCompateDelegateImplV9.setContentView（AppCompateDelegateImplV9.java:287）
位于android.support.v7.app.AppCompatActivity.setContentView（AppCompatActivity.java:139）
位于com.example.godwinacquah.ourstudybuddy.MainActivity.onCreate（MainActivity.java:19）
位于android.app.Activity.performCreate（Activity.java:5231）
位于android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1087）
在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2159）上
位于android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2245）
在android.app.ActivityThread.access$800（ActivityThread.java:135）
在android.app.ActivityThread$H.handleMessage（ActivityThread.java:1196）上
位于android.os.Handler.dispatchMessage（Handler.java:102）
位于android.os.Looper.loop（Looper.java:136）
位于android.app.ActivityThread.main（ActivityThread.java:5017）
位于java.lang.reflect.Method.Invokenactive（本机方法）
位于java.lang.reflect.Method.invoke（Method.java:515）
在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:779）上
位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:595）
在dalvik.system.NativeStart.main（本机方法）
原因：android.content.res.Resources$NotFoundException:资源ID#0x7f070097
位于android.content.res.Resources.getValue（Resources.java:1123）
位于android.support.v7.widget.ResourcesWrapper.getValue（ResourcesWrapper.java:208）
在android.support.v7.widget.AppCompatidDrawableManager.loadDrawableFromDelegates（AppCompatidDrawableManager.java:328）上
位于android.support.v7.widget.AppCompatidDrawableManager.getDrawable（AppCompatidDrawableManager.java:193）
在android.support.v7.widget.AppCompatidDrawableManager.getDrawable（AppCompatidDrawableManager.java:186）上
位于android.support.v7.content.res.AppCompatResources.getDrawable（AppCompatResources.java:100）
位于android.support.v7.widget.AppCompatImageHelper.loadFromAttributes（AppCompatImageHelper.java:58）
位于android.support.v7.widget.AppCompatImageView。（AppCompatImageView.java:77）
位于android.support.v7.widget.AppCompatImageView。（AppCompatImageView.java:67）
位于android.support.v7.app.AppCompatViewInflater.createImageView（AppCompatViewInflater.java:181）
在android.support.v7.app.AppCompatViewInflater.createView（AppCompatViewInflater.java:105）上
在android.support.v7.app.AppCompateDelegateImplV9.createView（AppCompateDelegateImplV9.java:1035）
位于android.support.v7.app.AppCompateDelegateImplV9.onCreateView（AppCompateDelegateImplV9.java:1092）
位于android.view.LayoutInflater.createViewFromTag（LayoutInflater.java:685）
位于android.view.LayoutInflater.rInflate（LayoutInflater.java:756）
在android.view.LayoutInflater.inflate（LayoutInflater.java:492）
在android.view.LayoutInflater.inflate（LayoutInflater.java:397）
在android.view.LayoutInflater.充气（LayoutInflater.java:353）
在android.support.v7.app.AppCompateDelegateImplV9.setContentView（AppCompateDelegateImplV9.java:287）
位于android.support.v7.app.AppCompatActivity.setContentView（AppCompatActivity.java:139）
位于com.example.godwinacquah.ourstudybuddy.MainActivity.onCreate（MainActivity.java:19）
位于android.app.Activity.performCreate（Activity.java:5231）
在android.app.Instrumentation.callActivityOnCreat
08-08 15:46:40.522 3506-3506/com.example.godwinacquah.ourstudybuddy W/ResourceType: Failure getting entry for 0x7f070097 (t=6 e=151) in package 0 (error -75)
Failure getting entry for 0x7f070097 (t=6 e=151) in package 0 (error -75)
08-08 15:46:40.522 3506-3506/com.example.godwinacquah.ourstudybuddy D/AndroidRuntime: Shutting down VM
08-08 15:46:40.522 3506-3506/com.example.godwinacquah.ourstudybuddy W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x9cd74b20)
08-08 15:46:40.532 3506-3506/com.example.godwinacquah.ourstudybuddy E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.godwinacquah.ourstudybuddy, PID: 3506
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.godwinacquah.ourstudybuddy/com.example.godwinacquah.ourstudybuddy.MainActivity}: android.view.InflateException: Binary XML file line #100: Error inflating class ImageView
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
    at android.app.ActivityThread.access$800(ActivityThread.java:135)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5017)
    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:779)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    at dalvik.system.NativeStart.main(Native Method)
 Caused by: android.view.InflateException: Binary XML file line #100: Error inflating class ImageView
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:714)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:756)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
    at com.example.godwinacquah.ourstudybuddy.MainActivity.onCreate(MainActivity.java:19)
    at android.app.Activity.performCreate(Activity.java:5231)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
    at android.app.ActivityThread.access$800(ActivityThread.java:135) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:136) 
    at android.app.ActivityThread.main(ActivityThread.java:5017) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    at dalvik.system.NativeStart.main(Native Method) 
 Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f070097
    at android.content.res.Resources.getValue(Resources.java:1123)
    at android.support.v7.widget.ResourcesWrapper.getValue(ResourcesWrapper.java:208)
    at android.support.v7.widget.AppCompatDrawableManager.loadDrawableFromDelegates(AppCompatDrawableManager.java:328)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:193)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:186)
    at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:100)
    at android.support.v7.widget.AppCompatImageHelper.loadFromAttributes(AppCompatImageHelper.java:58)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:77)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:67)
    at android.support.v7.app.AppCompatViewInflater.createImageView(AppCompatViewInflater.java:181)
    at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:105)
    at android.support.v7.app.AppCompatDelegateImplV9.createView(AppCompatDelegateImplV9.java:1035)
    at android.support.v7.app.AppCompatDelegateImplV9.onCreateView(AppCompatDelegateImplV9.java:1092)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:756) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287) 
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139) 
    at com.example.godwinacquah.ourstudybuddy.MainActivity.onCreate(MainActivity.java:19) 
    at android.app.Activity.performCreate(Activity.java:5231) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
    at android.app.ActivityThread.access$800(ActivityThread.java:135) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:136) 
    at android.app.ActivityThread.main(ActivityThread.java:5017) 
    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:779) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    at dalvik.system.NativeStart.main(Native Method) 
08-08 15:46:40.562 3506-3506/com.example.godwinacquah.ourstudybuddy D/dalvikvm: GC_FOR_ALLOC freed 328K, 11% free 3297K/3700K, paused 17ms, total 26ms
08-08 15:46:40.632 1629-3519/system_process D/dalvikvm: GC_FOR_ALLOC freed 2846K, 40% free 12585K/20720K, paused 70ms, total 71ms

defaultConfig {
    applicationId "com.app"
    minSdkVersion 15
    versionCode 1
    versionName "x"
    vectorDrawables.useSupportLibrary = true
}

dependencies {
//...
compile "com.android.support:support-vector-drawable:$appcompatVersion"
}