如何存储抽拉以阵列 [英] How to store drawable in an array
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问题描述
我想下载一些图片,并想将其存储在一个数组绘制。于是,我就宣告绘制array.But它,当我访问数组返回我空指针
例外。
I want to download a bunch of images and would like to store it as drawable in an array. So I tried declaring a drawable array.But it returns me nullPointer
exception when I access that array.
我的问题是,如何声明数组类型为绘制?
My question is, how to declare an array type as drawable ?
推荐答案
可绘制的数组定义应该像:
an array of drawables would be declared like:
int numDrawables = 10;
Drawable[] drawableArray = new Drawable[numDrawables];
要填充数组:
for(int i = 0; i < numDrawables; i++){
// get a drawable from somewhere
Drawable drawable = new Drawable();
drawableArray[i] = drawable;
}
要访问数组:
Drawable aDrawable = drawableArray[0];
这是基本的Java,如果您收到空指针异常,你正在做的事情是错误的。
This is basic java, If you are getting null pointer exceptions, you are doing something wrong.
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