Wave curve in android studio

问题

Hi friends can anyone please help me in this. i want to create a login page in this way

But it is not working in emulator and android 8 phone. it is working in android 5 phone. Working fine if i remove the image view which contains curve. getting this error when i try in android 8 or emulator.

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.loginapi/com.example.loginapi.views.Loginactivity}:
android.view.InflateException: Binary XML file line #11 in
com.example.loginapi:layout/activity_main: Binary XML file line #11 in
com.example.loginapi:layout/activity_main: Error inflating class
ImageView
    at 
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
    at android.os.Handler.dispatchMessage(Handler.java:107)
    at android.os.Looper.loop(Looper.java:214)
    at android.app.ActivityThread.main(ActivityThread.java:7356)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
 Caused by: android.view.InflateException: Binary XML file line #11 in com.example.loginapi:layout/activity_main: Binary XML file line #11 in com.example.loginapi:layout/activity_main: Error inflating class ImageView
 Caused by: android.view.InflateException: Binary XML file line #11 in com.example.loginapi:layout/activity_main: Error inflating class ImageView
 Caused by: android.content.res.Resources$NotFoundException: Drawable com.example.loginapi:drawable/wave with resource ID
 #0x7f07007b

 Caused by: android.content.res.Resources$NotFoundException: File res/drawable/wave.xml from drawable resource ID #0x7f07007b
    at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:876)
    at android.content.res.ResourcesImpl.loadDrawable(ResourcesImpl.java:659)
    at android.content.res.Resources.getDrawableForDensity(Resources.java:906)
    at android.content.res.Resources.getDrawable(Resources.java:845)
    at android.content.Context.getDrawable(Context.java:687)
    at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:463)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:203)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:191)
    at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:102)
    at android.support.v7.widget.AppCompatImageHelper.loadFromAttributes(AppCompatImageHelper.java:59)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:78)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:68)
    at android.support.v7.app.AppCompatViewInflater.createImageView(AppCompatViewInflater.java:182)
    at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:106)
    at android.support.v7.app.AppCompatDelegateImpl.createView(AppCompatDelegateImpl.java:1266)
    at android.support.v7.app.AppCompatDelegateImpl.onCreateView(AppCompatDelegateImpl.java:1316)
    at android.view.LayoutInflater.tryCreateView(LayoutInflater.java:1061)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:997)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:1123)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1084)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:682)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:534)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:481)
    at android.support.v7.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)

com.example.loginapi.views.Loginactivity.onCreate(Loginactivity.java:59)
    at android.app.Activity.performCreate(Activity.java:7802)
    at android.app.Activity.performCreate(Activity.java:7791)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
    at android.os.Handler.dispatchMessage(Handler.java:107)
    at android.os.Looper.loop(Looper.java:214)
    at android.app.ActivityThread.main(ActivityThread.java:7356)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
 Caused by: java.lang.IllegalArgumentException: Path string cannot be empty.
    at android.util.PathParser.nCreatePathDataFromString(Native Method)
    at android.util.PathParser.access$200(PathParser.java:25)
    at android.util.PathParser$PathData.<init>(PathParser.java:78)
    at android.graphics.drawable.VectorDrawable$VFullPath.updateStateFromTypedArray(VectorDrawable.java:2039)
    at android.graphics.drawable.VectorDrawable$VFullPath.inflate(VectorDrawable.java:1990)
    at android.graphics.drawable.VectorDrawable.inflateChildElements(VectorDrawable.java:836)
    at android.graphics.drawable.VectorDrawable.inflate(VectorDrawable.java:734)
    at android.graphics.drawable.DrawableInflater.inflateFromXmlForDensity(DrawableInflater.java:144)
    at android.graphics.drawable.Drawable.createFromXmlInnerForDensity(Drawable.java:1402)
    at android.graphics.drawable.Drawable.createFromXmlForDensity(Drawable.java:1361)
    at android.content.res.ResourcesImpl.loadXmlDrawable(ResourcesImpl.java:939)
    at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:862)
      ... 41 more

My code wave.xml

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="600dp"
    android:height="600dp"
    android:viewportWidth="600"
    android:viewportHeight="600">

   <path
        android:fillColor="#11b6ed"
        android:fillAlpha="0"
        android:strokeColor="#11b6ed"
        android:strokeWidth="1"
        android:pathData="" />
    <path
        android:fillColor="#11b6ed"
        android:fillAlpha="0"
        android:strokeColor="#11b6ed"
        android:strokeWidth="1"
        android:pathData="" />
    <path
        android:fillColor="#11b6ed"
        android:strokeWidth="1"
        android:pathData="M0 00L637.5 00L637.5 519.0C528.33 483.94 424.58 482.69 326.25 516.02C227.91 549.35 119.17 545.6 0 504.77L0 00Z" />
    <path
        android:fillColor="#11b6ed"
        android:fillAlpha="0"
        android:strokeColor="#11b6ed"
        android:strokeWidth="1"
        android:pathData="M0 00L637.5 00L637.5 519.0C528.33 483.94 424.58 482.69 326.25 516.02C227.91 549.35 119.17 545.6 0 504.77L0 00Z" />
    <path
        android:fillColor="#11b6ed"
        android:fillAlpha="0"
        android:strokeColor="#11b6ed"
        android:strokeWidth="1"
        android:pathData="M0 00L637.5 00L637.5 519.0C528.33 483.94 424.58 482.69 326.25 516.02C227.91 549.35 119.17 545.6 0 504.77L0 00Z" />
</vector

activity_login.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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".views.Loginactivity"

   >

    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="364dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:srcCompat="@drawable/wave" />

    <Button
        android:id="@+id/imageButton2"
        android:layout_width="148dp"
        android:layout_height="48dp"
        android:background="@null"
        android:drawableLeft="@drawable/google"
        android:text="Sign In With \n Google"

        android:textSize="12sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.241"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.535" />

    <Button
        android:id="@+id/imageButton"
        android:layout_width="148dp"
        android:layout_height="48dp"
        android:background="@null"
        android:drawableLeft="@drawable/facebook"
        android:text="Sign In With \n Facebook"
        android:textSize="12sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.821"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.535" />

    <EditText
        android:id="@+id/username"
        android:layout_width="250dp"
        android:layout_height="48dp"
        android:autofillHints=""
        android:hint="@string/username"
        android:inputType="textPersonName"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.286"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.748" />

    <EditText
        android:id="@+id/password"
        android:layout_width="250dp"
        android:layout_height="57dp"
        android:hint="@string/tvpassword"
        android:inputType="textPassword"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.286"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.847" />

    <Button
        android:id="@+id/btn_login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn_login"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.51"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.954" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="OR"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.501"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.631" />

    <View
        android:id="@+id/View03"
        android:layout_width="140dp"
        android:layout_height="3dp"
        android:background="#acafb0"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintHorizontal_bias="0.921"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.629" />

    <View

        android:layout_width="140dp"
        android:layout_height="3dp"
        android:background="#acafb0"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.148"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.626" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Sign in to Explico"
        android:textColor="#ed0741"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.53"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.457" />
</android.support.constraint.ConstraintLayout>

this is the expected output:

回答1:

If srcCompat you should use android.support.v7.widget.AppCompatImageView instead of ImageView.

 <android.support.v7.widget.AppCompatImageView
    android:id="@+id/image"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="364dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toStartOf="parent"
    app:srcCompat="@drawable/wave" />

And add this in build.gradle

 android {
   defaultConfig {
      vectorDrawables {
         useSupportLibrary = true
      }
    }
   }

OR use src instead of srcCompat in ImageView .

I hope this will help .

回答2:

Here is problem in your image in first 2 path tags android:pathData="" is empty. Because of empty pathData app is crashed and you getting error.

Please use another image or below vector code:

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="600dp"
    android:height="600dp"
    android:viewportWidth="600"
    android:viewportHeight="600">
    <path
        android:fillColor="#11b6ed"
        android:strokeWidth="1"
        android:pathData="M0 00L637.5 00L637.5 519.0C528.33 483.94 424.58 482.69 326.25 516.02C227.91 549.35 119.17 545.6 0 504.77L0 00Z" />
    <path
        android:fillColor="#11b6ed"
        android:fillAlpha="0"
        android:strokeColor="#11b6ed"
        android:strokeWidth="1"
        android:pathData="M0 00L637.5 00L637.5 519.0C528.33 483.94 424.58 482.69 326.25 516.02C227.91 549.35 119.17 545.6 0 504.77L0 00Z" />
    <path
        android:fillColor="#11b6ed"
        android:fillAlpha="0"
        android:strokeColor="#11b6ed"
        android:strokeWidth="1"
        android:pathData="M0 00L637.5 00L637.5 519.0C528.33 483.94 424.58 482.69 326.25 516.02C227.91 549.35 119.17 545.6 0 504.77L0 00Z" />
</vector>

And use android:src="@drawable/wave" instead of app:srcCompat="@drawable/wave"

I hope its work for you.

来源：https://stackoverflow.com/questions/59860670/wave-curve-in-android-studio