以编程方式替换选择器图像-移动开发问题

Replace selector images programmatically(以编程方式替换选择器图像)

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问题描述

我有一个 ImageView，它有一个可绘制的图像资源设置为一个选择器.如何以编程方式访问选择器并更改突出显示和非突出显示状态的图像?

I have an ImageView that has a drawable image resource set to a selector. How do I programmatically access the selector and change the images of the highlighted and non-highlighted state?

这里是选择器的代码:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/iconSelector">
  <!-- pressed -->
  <item android:state_pressed="true" android:drawable="@drawable/btn_icon_hl" />
  <!-- focused -->
  <item android:state_focused="true" android:drawable="@drawable/btn_icon_hl" />
  <!-- default -->
  <item android:drawable="@drawable/btn_icon" />
</selector>

我希望能够将 btn_icon_hl 和 btn_icon 替换为其他图像.

I want to be able to replace btn_icon_hl and btn_icon with other images.

推荐答案

据我所知(我自己也试过做类似的事情)，在 StateListDrawable 之后没有办法修改单个状态已经被定义了.但是，您可以通过代码定义一个新的:

As far as I've been able to find (I've tried doing something similar myself), there's no way to modify a single state after the StateListDrawable has already been defined. You can, however, define a NEW one through code:

StateListDrawable states = new StateListDrawable();
states.addState(new int[] {android.R.attr.state_pressed},
    getResources().getDrawable(R.drawable.pressed));
states.addState(new int[] {android.R.attr.state_focused},
    getResources().getDrawable(R.drawable.focused));
states.addState(new int[] { },
    getResources().getDrawable(R.drawable.normal));
imageView.setImageDrawable(states);

您可以只保留其中两个，或者根据需要创建一个不同的.

And you could just keep two of them on hand, or create a different one as you need it.

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