All geek questions in one place

Android: java.lang.NullPointerException in android.graphics.Canvas.drawLine (Canvas.java:809) (possibly related to my paintable resource)

I am trying to create a child view with 7 columns and 24 TextViews in each column.

I get an exception when my activity starts and I don't have a packet anywhere in the stack trace.

Here is my source for each of the 24 text views

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item><shape><solid android:color="#CCC"/></shape></item>
    <item android:top=".5pt" android:bottom=".5pt">
        <shape android:shape="line">
            <size android:height="1pt" android:color="#CCC" android:dashWidth="1pt" android:dashGap="1pt" />
        </shape>
    </item>
</layer-list>

The processor switches to 100% for a second or two before this happens.

I am using an emulator for Android 2.2

Here is my exception.

01-26 16:51:38.084: ERROR/AndroidRuntime(955): FATAL EXCEPTION: main
01-26 16:51:38.084: ERROR/AndroidRuntime(955): java.lang.NullPointerException
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.graphics.Canvas.drawLine(Canvas.java:809)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.graphics.drawable.GradientDrawable.draw(GradientDrawable.java:347)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.graphics.drawable.LayerDrawable.draw(LayerDrawable.java:320)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.View.draw(View.java:6725)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.View.draw(View.java:6846)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.View.buildDrawingCache(View.java:6502)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.onAnimationStart(ViewGroup.java:1253)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.drawChild(ViewGroup.java:1499)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.View.draw(View.java:6743)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.View.draw(View.java:6743)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.View.draw(View.java:6743)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1842)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewRoot.draw(ViewRoot.java:1407)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewRoot.performTraversals(ViewRoot.java:1163)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.os.Looper.loop(Looper.java:123)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at android.app.ActivityThread.main(ActivityThread.java:4627)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at java.lang.reflect.Method.invokeNative(Native Method)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at java.lang.reflect.Method.invoke(Method.java:521)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-26 16:51:38.084: ERROR/AndroidRuntime(955):     at dalvik.system.NativeStart.main(Native Method)

Edit

Renaming the size for the stroke eliminates the collapse, but I do not get the dashed line. I want the horizontal dashed line to be either in the middle or at the bottom of the drawing.

+3
source share
1

- , GradientDrawable.mStrokePaint NULL, , , , <stroke> XML.

<size> <stroke> , , , :

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item><shape><solid android:color="#CCC"/></shape></item>
    <item android:top=".5pt" android:bottom=".5pt">
        <shape android:shape="line">
            <stroke android:height="1pt" android:color="#FF000000" android:dashWidth="1pt" android:dashGap="1pt" />
        </shape>
    </item>
</layer-list>
+7

Source: https://habr.com/ru/post/1788053/

More articles:


All Articles