自定義switchButton

這篇博客要講的是自定義switchButton，不過沒有設置動畫效果。

我用GradientDrawable來繪製switchButton，我們先看看最終的效果：

點擊前：

點擊後

接下來我們看看如何實現

首先：該類繼承RelativeLayout

SwitchButton extends RelativeLayout{
}

該類需要用到的成員：

    private ImageView track; //滑塊所在的軌道
    private ImageView slider; //switchButton上面的滑塊

    private GradientDrawable trackDrawable; //用於繪製軌道
    private GradientDrawable sliderDrawable; //用於繪製滑塊

    private LayoutParams trackLy; //軌道的佈局
    private LayoutParams sliderLy; //滑塊的佈局

   private boolean isCkeck = false; //是否點擊

構造方法：

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();

        //軌道的形狀，顏色，大小，邊緣，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));

        //設置滑塊的形狀，顏色，大小，邊緣，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));

        //設置給imageView
        track.setImageDrawable(trackDrawable);
        slider.setImageDrawable(sliderDrawable);

        addView(track);
        addView(slider);

        setOnClickListener(this);
    }

設置點擊事件

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

private void setCheck(boolean isCheck){
        if (isCheck){
            //軌道變為藍色
            trackDrawable.setColor(getResources().getColor(R.color.blue));
            //註意這裡進行版本判斷。if與else裡面代碼的效果是相同的，只是有些代碼在某些版本下才能夠用
            if (Build.VERSION.SDK_INT >= 17) { 
                sliderLy.addRule(ALIGN_PARENT_END);
                //設置新的佈局之前，要先移除之前的佈局，否則會有疊加的效果
                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);
        }
    }

 以上便是所有的代碼。

請尊重勞動成果，轉載請標明出處：http://www.cnblogs.com/tangZH/p/8277428.html