VectorDrawable到位图:空对象引用上的Bitmap.setHasAlpha(boolean)' [英] VectorDrawable to Bitmap: Bitmap.setHasAlpha(boolean)' on a null object reference

问题描述

我正在尝试从VectorDrawable(xml图像)获取Bitmap:

I'm trying to get Bitmap from VectorDrawable (xml image):

VectorDrawable vectorDrawable = (VectorDrawable) ContextCompat.getDrawable(mContext, R.drawable.test);

Bitmap bitmap = UtilMethods.getBitmapFromVector(vectorDrawable);

但是应用程序在Bitmap.createBitmap方法上崩溃，并显示Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.Bitmap.setHasAlpha(boolean)' on a null object reference错误

But app crashes on Bitmap.createBitmap method with Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.Bitmap.setHasAlpha(boolean)' on a null object reference error

    public static Bitmap getBitmapFromVector(VectorDrawable vectorDrawable) {
        Bitmap bitmap = Bitmap.createBitmap(vectorDrawable.getIntrinsicWidth(),
                vectorDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        vectorDrawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        vectorDrawable.draw(canvas);
        return bitmap;
    }

p.s.

compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support:support-v4:25.3.1'

这里有一些简单的xml drawable(逗号符号)

here some simple xml drawable (comma symbol)

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="16000dp"
    android:height="16000dp"
    android:viewportWidth="16000"
    android:viewportHeight="16000">


    <path
        android:fillColor="#040607"
        android:strokeWidth="1"
        android:pathData="M3637 11910 l486 -730 484 0 c265 0 483 3 483 8 0 4 -130 331 -288 727 l-288 720
-682 3 -682 2 487 -730z" />

</vector>

我尝试了从矢量可绘制对象中获取位图的所有方法 他们都在此.createBitmap方法上失败

I tried every method from Getting Bitmap from vector drawable All of them fails on this .createBitmap method

似乎是

android:width="16000dp"
android:height="16000dp"
android:viewportWidth="16000"
android:viewportHeight="16000">

具有重要价值...

我没有添加完整的xml，还有更多的path标记，因此它不仅仅是具有如此大值的逗号符号:)

I've added not full xml, there are more path tags, so it's not just comma symbol with such big values:)

我试图将值减小到2000(例如)，并且应用程序停止崩溃，但它毁了我的图片

I tried to reduce values to 2000 (e.g.) and app stopped crashing, but it ruined my image

我使用 http://inloop.github.io/svg2android/

推荐答案

更改

android:width="16000dp"
android:height="16000dp"

到

android:width="24dp"
android:height="24dp"

不需要加油:

android:viewportWidth="16000"
android:viewportHeight="16000">

这篇关于VectorDrawable到位图:空对象引用上的Bitmap.setHasAlpha(boolean)'的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！