自定义switchButton

这篇博客要讲的是自定义switchButton，不过没有设置动画效果。

我用GradientDrawable来绘制switchButton，我们先看看最终的效果：

点击前：

点击后

接下来我们看看如何实现

首先：该类继承RelativeLayout

SwitchButton extends RelativeLayout{
}

该类需要用到的成员：

    private ImageView track; //滑块所在的轨道
    private ImageView slider; //switchButton上面的滑块

    private GradientDrawable trackDrawable; //用于绘制轨道
    private GradientDrawable sliderDrawable; //用于绘制滑块

    private LayoutParams trackLy; //轨道的布局
    private LayoutParams sliderLy; //滑块的布局

   private boolean isCkeck = false; //是否点击

构造方法：

public SwitchButton(Context context) {
        super(context);
        init();
    }

    public SwitchButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

private void init(){
        setClickable(true);
        setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 
             ViewGroup.LayoutParams.WRAP_CONTENT));
        track = new ImageView(getContext());
        slider = new ImageView(getContext());

        trackLy = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
             ViewGroup.LayoutParams.WRAP_CONTENT);
        trackLy.addRule(CENTER_VERTICAL);

        sliderLy = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 
             ViewGroup.LayoutParams.WRAP_CONTENT);
        sliderLy.addRule(CENTER_VERTICAL);

        track.setLayoutParams(trackLy);
        slider.setLayoutParams(sliderLy);

        trackDrawable = new GradientDrawable();
        sliderDrawable = new GradientDrawable();

        //轨道的形状，颜色，大小，边缘，角度
        trackDrawable.setShape(GradientDrawable.RECTANGLE);
        trackDrawable.setColor(getResources().getColor(R.color.white_FFFFFFFF));
        trackDrawable.setSize(getResources()
                .getDimensionPixelOffset(R.dimen.track_width),
                getResources().getDimensionPixelOffset(R.dimen.track_height));
        trackDrawable.setStroke(getResources()
                .getDimensionPixelOffset(R.dimen.switch_button_stroke),
                getResources().getColor(R.color.gray));
        trackDrawable.setCornerRadius(getResources()
                .getDimension(R.dimen.switch_button_cornerRadius));

        //设置滑块的形状，颜色，大小，边缘，角度
        sliderDrawable.setShape(GradientDrawable.OVAL);
        sliderDrawable.setColor(getResources().getColor(R.color.white_FFFFFFFF));
        sliderDrawable.setSize(getResources()
                .getDimensionPixelOffset(R.dimen.slider_size),
                getResources().getDimensionPixelOffset(R.dimen.slider_size));
        sliderDrawable.setStroke(getResources()
                .getDimensionPixelOffset(R.dimen.switch_button_stroke),
                getResources().getColor(R.color.gray));

        //设置给imageView
        track.setImageDrawable(trackDrawable);
        slider.setImageDrawable(sliderDrawable);

        addView(track);
        addView(slider);

        setOnClickListener(this);
    }

设置点击事件

@Override
    public void onClick(View view) {
        if (isCkeck)
        {
            isCkeck = false;
        }else {
            isCkeck = true;
        }
        setCheck(isCkeck);
    }

private void setCheck(boolean isCheck){
        if (isCheck){
            //轨道变为蓝色
            trackDrawable.setColor(getResources().getColor(R.color.blue));
            //注意这里进行版本判断。if与else里面代码的效果是相同的，只是有些代码在某些版本下才能够用
            if (Build.VERSION.SDK_INT >= 17) {
                sliderLy.addRule(ALIGN_PARENT_END);
                //设置新的布局之前，要先移除之前的布局，否则会有叠加的效果
                sliderLy.removeRule(ALIGN_PARENT_START);
            } else {
                sliderLy.addRule(ALIGN_PARENT_RIGHT);
                sliderLy.addRule(ALIGN_PARENT_LEFT,0);
            }
            slider.setLayoutParams(sliderLy);
        }else {
            trackDrawable.setColor(getResources().getColor(R.color.white_FFFFFFFF));
            if (Build.VERSION.SDK_INT >= 17) {
                sliderLy.removeRule(ALIGN_PARENT_END);
                sliderLy.addRule(ALIGN_PARENT_START);
            } else {
                sliderLy.addRule(ALIGN_PARENT_RIGHT,0);
                sliderLy.addRule(ALIGN_PARENT_LEFT);
            }
            slider.setLayoutParams(sliderLy);
        }
    }

 以上便是所有的代码。

请尊重劳动成果，转载请标明出处：http://www.cnblogs.com/tangZH/p/8277428.html