自辨认的视图这是为了响应选择 [英] Custom Checkable View which responds to Selector

问题描述

我有一组的FrameLayout 的，我想成为可检查/选择，

I have a group of FrameLayout which I want to be checkable/selectable,

也就是说，单击后，我想了的FrameLayout 来显示为检查 - 当pressed再次我想它成为联合国检查。更重要的是，我想这种视觉阙被描述像往常一样通过，虽然使用了＆LT;选择＆GT;

That is, after a click I would like the FrameLayout to display as checked - when pressed again I would like it to become unchecked. What's more, I want this visual que to be described as usual through though the use of a <selector>.

我似乎无法得到这个工作 - 我不知道我错过了什么：

I can't seem to get this working - I'm not sure what I'm missing:

public class CheckableFrameLayout extends FrameLayout implements Checkable {
    private boolean mChecked = false;
    public CheckableFrameLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void setChecked(boolean checked) {
        mChecked = checked;
        refreshDrawableState();
    }

    public boolean isChecked() {
        return mChecked;
    }

    public void toggle() {
        setChecked(!mChecked);
    }
}

的布局 CheckableFrameLayout ：

<com.test.view.CheckableFrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/selector_horizontal"
    android:clickable="true" >

选择器支持它（selector_horizo​​ntal.xml）：

The selector backing it (selector_horizontal.xml):

<item android:drawable="@drawable/selector_vertical_selected" android:state_pressed="false" android:state_checked="true"/>  
<item android:drawable="@drawable/selector_vertical_pressed" android:state_pressed="true" android:state_checked="false"/>
<item android:drawable="@drawable/selector_vertical_normal" android:state_pressed="false" android:state_checked="false"/>

用c的pssed STATE_ $ P $上述$ C $工作正常，但视图本身并没有变得检查（不为可检查 code被称为通过调试发现的）。

Using the above code the "state_pressed" is working fine, but the View itself is not becoming checked (not is the Checkable code being called as discovered through debug).

推荐答案

添加以下code到可检查类的工作方式：

Adding the following code to the Checkable class works:

private static final int[] CheckedStateSet = {
    android.R.attr.state_checked,
};

@Override
protected int[] onCreateDrawableState(int extraSpace) {
    final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
    if (isChecked()) {
        mergeDrawableStates(drawableState, CheckedStateSet);
    }
    return drawableState;
}

@Override
public boolean performClick() {
    toggle();
    return super.performClick();
}

这篇关于自辨认的视图这是为了响应选择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！