安卓.在该按钮创建的操作完成之前，如何保持按钮显示为 PRESSED?

问题描述

我有 button_focused、button_pressed 和 button_normal 图像.当我按下按钮时，会显示 button_pressed 图像并开始与按钮按下相关的操作.

I have button_focused, button_pressed, and button_normal images. When I press the button, the button_pressed image is displayed and the action related to the button pressing begins.

当我停止按下按钮时，动作继续，但按钮返回到正在显示的 button_normal 图像.

When I quit pressing the button, the action continues but the button returns to button_normal image being displayed.

如何在整个操作过程中将显示的按钮图像设置为 button_pressed 然后重置为 button_normal 图像?

How can I set the button image being displayed to button_pressed during the entire action then reset to the button_normal image?

感谢您的时间

推荐答案

我使用了一个类似

void setHighlighted(boolean highlight) {
    button.setBackgroundResource( highlight
                                ? R.drawable.bbg_pressed
                                : R.drawable.button_background);
}

其中 button_background 是定义在button_backgroung.xml:

where button_background is a selector defined inbutton_backgroung.xml:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:state_pressed="true" android:drawable="@drawable/bbg_pressed"></item>
    <item android:state_focused="true" android:drawable="@drawable/bbg_selected"></item>
    <item android:drawable="@drawable/bbg_normal"></item>
</selector>

即这段代码不干扰Android框架使用的按下状态；相反，它改变了背景，使按钮看起来被按下.

That is, this code does not interfere with the pressed state used by the Android framework; instead, it changes the background so that the button looks pressed.

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