这是调试报告inn api 19 emulator ..
Caused by: android.view.InflateException: Binary XML file line #47: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:620)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
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:292)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.admin.clicknorder.FoodDetail.onCreate(FoodDetail.java:42)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
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:5001)
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:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:594)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
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:292)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.admin.clicknorder.FoodDetail.onCreate(FoodDetail.java:42)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
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:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.content.res.Resources$NotFoundException: File res/drawable/ic_shopping_cart_black_24dp.xml from drawable resource ID #0x7f020068
at android.content.res.Resources.loadDrawable(Resources.java:2096)
at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
at android.widget.ImageView.<init>(ImageView.java:129)
at android.widget.ImageButton.<init>(ImageButton.java:87)
at android.support.design.widget.VisibilityAwareImageButton.<init>(VisibilityAwareImageButton.java:36)
at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:157)
at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:153)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:594)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
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:292)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.admin.clicknorder.FoodDetail.onCreate(FoodDetail.java:42)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
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:5001)
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:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
at dalvik.system.NativeStart.main(Native Method)
Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #1: invalid drawable tag vector
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:933)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:877)
at android.content.res.Resources.loadDrawable(Resources.java:2092)
at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
at android.widget.ImageView.<init>(ImageView.java:129)
at android.widget.ImageButton.<init>(ImageButton.java:87)
at android.support.design.widget.VisibilityAwareImageButton.<init>(VisibilityAwareImageButton.java:36)
at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:157)
at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:153)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:594)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
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:292)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.admin.clicknorder.FoodDetail.onCreate(FoodDetail.java:42)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
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:5001)
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:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
at dalvik.system.NativeStart.main(Native Method)
05-06 15:36:10.141 468-503/system_process E/InputDispatcher: channel '52947f70 com.example.admin.clicknorder/com.example.admin.clicknorder.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
05-06 15:36:10.141 468-503/system_process E/InputDispatcher: channel '52a636f8 com.example.admin.clicknorder/com.example.admin.clicknorder.Home (server)' ~ Channel is unrecoverably broken and will be disposed!
05-06 15:36:10.141 468-503/system_process E/InputDispatcher: channel '52a783c8 com.example.admin.clicknorder/com.example.admin.clicknorder.FoodList (server)' ~ Channel is unrecoverably broken and will be disposed!
05-06 15:36:10.285 5612-5612/com.example.admin.clicknorder E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method android.support.v7.widget.AppCompatImageHelper.hasOverlappingRendering
05-06 15:36:10.345 5612-5612/com.example.admin.clicknorder E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.admin.clicknorder, PID: 5612
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.admin.clicknorder/com.example.admin.clicknorder.Home}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
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:5001)
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:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.admin.clicknorder.Home.onCreate(Home.java:78)
at android.app.Activity.performCreate(Activity.java:5231)
这就是来自fooddetails.java的错误
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_food_detail);
database=FirebaseDatabase.getInstance();
foods=database.getReference("Food");
此foodetail.xml活动文件
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.admin.clicknorder.FoodDetail"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="@+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
>
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing"
android:layout_width="match_parent"
android:layout_height="350dp"
app:layout_scrollFlags="exitUntilCollapsed"
app:contentScrim="#0d0e0d"
app:expandedTitleTextAppearance="@android:color/transparent"
>
</android.support.design.widget.CollapsingToolbarLayout>
<ImageView
android:id="@+id/image_food"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentDescription="@null"
android:scaleType="centerCrop"
app:layout_collapseMode="parallax"
/>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:title="Food Name"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="parallax"
/>
</android.support.design.widget.AppBarLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/btnCart"
app:srcCompact="@drawable/ic_shopping_cart_black_24dp"
app:elevation="6dp"
app:pressedTranslationZ="12dp"
app:layout_anchor="@id/app_bar_layout"
app:layout_anchorGravity="bottom|right|end"
app:useCompatPadding="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<android.support.v4.widget.NestedScrollView
android:id="@+id/nesterScrollView"
android:clipToPadding="false"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardElevation="5dp"
app:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/food_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:padding="12dp"
android:text="Food Name"
android:textColor="@color/colorPrimary"
android:textSize="20sp"
android:textStyle="bold" />
<LinearLayout
android:orientation="horizontal"
android:id="@+id/layout_price"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
app:srcCompat="@drawable/ic_attach_money_black_24dp"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/food_price"
android:layout_weight="9"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="1,000"
android:textColor="@color/colorPrimary"
android:textSize="18sp"
android:textStyle="bold" />
</LinearLayout>
<com.cepheuen.elegantnumberbutton.view.ElegantNumberButton
android:layout_width="100dp"
android:layout_height="30dp"
android:id="@+id/number_button"
android:layout_marginTop="8dp"
android:layout_marginLeft="8dp"
android:layout_marginBottom="18dp"
app:textSize="8sp"
app:backGroundColor="@color/colorAccent"
app:initialNumber="1"
app:finalNumber="20"
/>
</LinearLayout>
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
app:cardElevation="5dp"
app:cardUseCompatPadding="true"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/food_description"
android:layout_marginTop="12dp"
android:lineSpacingMultiplier="1.5"
android:padding="12dp"
android:text="description"
android:textColor="@android:color/black"
android:textSize="14sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</android.support.v7.widget.CardView>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
如果需要更多详细信息，我会编辑我的问题。谢谢
答案 0 :(得分：1)
正如我在日志中看到的那样，您在FloatingActionButton上的标识为R.id.btnCart
android.content.res.Resources$NotFoundException: File res/drawable/ic_shopping_cart_black_24dp.xml from drawable resource ID #0x7f020068 at
...
Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #1: invalid drawable tag vector at
...
Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method
可能是您制作了印刷错误，将app:srcCompact更改为app:srcCompat会解决问题