是否有可能以编程方式创建drawable并将其分配给ImageView？(Is it possible to programmatically create a drawable and assign it to an ImageView?)

 所以我想以某种方式在代码中创建一个Path对象（无XML）并将其绘制到ImageView中。 问题是我找不出任何方式来以编程方式创建任何形状，并让它出现在我的ImageView中。 我可以轻松地将ImageView分配给XML资源，并且工作正常，如下所示： 
 
imageView.setImageResource(R.drawable.resourcename);
 
 这是XML文件： 
 
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <size
        android:height="50dp"
        android:width="50dp" />
    <solid
        android:color="#00f"
        />
</shape>
 
 但是如果我做了一些像我认为应该工作的代码，它编译和运行没有错误，但没有任何反应。 我试图创建一个简单的RectShape并使用setImageDrawable将ImageView赋值给它。 我在这里完全咆哮错误的树吗？ 我对Android编码非常陌生，所以我很可能会在这里离开。 我注意到，我从来没有手动绘制矩形，我必须在某处做什么？ 我有点认为ImageView会照顾它，但也许不会。 让我知道你是否需要更多关于我的代码的信息。 
 
RectShape rect = new RectShape();
rect.resize(50,50);
ShapeDrawable sdRect = new ShapeDrawable(rect);
sdRect.getPaint().setColor(Color.BLACK);
sdRect.getPaint().setStyle(Paint.Style.FILL);
imageView.setImageDrawable(sdRect);

So I'm trying to somehow create a Path object in code (no XML) and draw it into an ImageView. Problem is I can't figure out any way to programmatically create ANY shape and have it show up in my ImageView. I can easily assign the ImageView to an XML resource and that works fine like this:
 
imageView.setImageResource(R.drawable.resourcename);
 
Here's the XML file:
 
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <size
        android:height="50dp"
        android:width="50dp" />
    <solid
        android:color="#00f"
        />
</shape>
 
But if I do something like this code below which I thought should work, it compiles and runs without errors, but nothing happens. I tried to create a simple RectShape and assign the ImageView to it with setImageDrawable. Am I totally barking up the wrong tree here? I am extremely new to Android coding fyi, so I very well may be way off here. I do notice that I'm never manually drawing the rectangle, do I have to do that somewhere? I sort of figured the ImageView would take care of it, but maybe not. Let me know if you need more information about my code.
 
RectShape rect = new RectShape();
rect.resize(50,50);
ShapeDrawable sdRect = new ShapeDrawable(rect);
sdRect.getPaint().setColor(Color.BLACK);
sdRect.getPaint().setStyle(Paint.Style.FILL);
imageView.setImageDrawable(sdRect);

原文：https://stackoverflow.com/questions/26453478