Android购物车动态添加

public class AddView extends LinearLayout implements View.OnClickListener {
    private final TextView viewById;
    private final ImageView btn_jian;
    private final ImageView btn_add;


    int max_num=4;//最大值
    int min_num=0;//最小值
    int deful_num=0;//默认值

    /**
     * 通过默认值与最大值对比  设置默认值
     * @param context
     */

//    public AddView(Context context) {
//       this(context,null);
//    }
//
//    public AddView(Context context, AttributeSet attrs) {
//        this(context, null,0);
//    }

    public AddView(Context context, AttributeSet attrs) {
        super(context, attrs);
        View inflate = View.inflate(context, R.layout.addview, this);
         viewById = (TextView) inflate.findViewById(R.id.tv);
        btn_jian = ( ImageView) inflate.findViewById(R.id.btn_jian);
        btn_add = ( ImageView) inflate.findViewById(R.id.btn_add);
        int deful_num = getDeful_num();
        setDeful_num(deful_num);
        btn_add.setOnClickListener(this);
        btn_jian.setOnClickListener(this);
    }


    public void onClick(View view){
        switch (view.getId()){
            case R.id.btn_add:
               // Toast.makeText(getContext(), "----", Toast.LENGTH_SHORT).show();
                addNum(view);
                break;
            case R.id.btn_jian:
                //Toast.makeText(getContext(), "----", Toast.LENGTH_SHORT).show();
                addJian(view);
                break;
        }
    }

    private void addJian(View view) {

        if(deful_num>min_num){
             deful_num--;
        }
        setDeful_num(deful_num);
        if(OnListnerChanged!=null){
            OnListnerChanged.changedNum(deful_num);
        }
        deleteGoods(view);
    }

    private void addNum(View view) {

        if(deful_num<max_num){
                deful_num++;
        }
        setDeful_num(deful_num);
        if(OnListnerChanged!=null){
            OnListnerChanged.changedNum(deful_num);
        }
        addGoods( view);

    }


    public int getMax_num() {
        return max_num;
    }

    public void setMax_num(int max_num) {
        this.max_num = max_num;
    }

    public int getMin_num() {
        return min_num;
    }
    public void setMin_num(int min_num) {
        this.min_num = min_num;
    }
    public int getDeful_num() {

        String nums = viewById.getText().toString().trim();
        if(!TextUtils.isEmpty(nums)){
             deful_num= Integer.parseInt(nums);
        }

        return deful_num;
    }

    public void setDeful_num(int deful_num) {
        this.deful_num = deful_num;
        viewById.setText(deful_num+"");

    }
    /**
     * 对外提供接口显示数据
     */
   public interface  OnListnerChanged{
        void changedNum(int deful_num);
    }

    public void setOnListnerChanged(AddView.OnListnerChanged onListnerChanged) {
        OnListnerChanged = onListnerChanged;
    }

    private OnListnerChanged OnListnerChanged;

/**
 * 创建动画
 */

private void deleteGoods( View view) {
    //点中的商品的数量是否为1件,是1件执行(滚动+透明+平移)
    if(deful_num<=0){
        //1.旋转
        RotateAnimation rotateAnimation = new RotateAnimation(0, 720, Animation.RELATIVE_TO_SELF, 0.5f,
                Animation.RELATIVE_TO_SELF, 0.5f);
        //2.透明
        AlphaAnimation alphaAnimation = new AlphaAnimation(1, 0);
        //3.平移(y轴不动,x轴由离自己右侧2个宽度的距离,回到初始位置)
        TranslateAnimation translateAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0,
                Animation.RELATIVE_TO_SELF, 2,
                Animation.RELATIVE_TO_SELF, 0,
                Animation.RELATIVE_TO_SELF, 0);
        //4.动画的集合
        AnimationSet animationSet = new AnimationSet(false);
        animationSet.addAnimation(rotateAnimation);
        animationSet.addAnimation(alphaAnimation);
        animationSet.addAnimation(translateAnimation);
        animationSet.setDuration(500);

       btn_jian.startAnimation(animationSet);

        animationSet.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
            }
            @Override
            public void onAnimationEnd(Animation animation) {
                btn_jian.setVisibility(View.GONE);
                viewById.setVisibility(View.GONE);

            }
            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });
    }
}


/**
 *  添加时的动画
 *
 */
private void addGoods(View view) {
    //以下动画,只有在商品数量是1件的时候触发
    if (deful_num ==1){
        //构建3组动画
        //1.旋转
        RotateAnimation rotateAnimation = new RotateAnimation(0, 720, Animation.RELATIVE_TO_SELF, 0.5f,
                Animation.RELATIVE_TO_SELF, 0.5f);
        //2.透明
        AlphaAnimation alphaAnimation = new AlphaAnimation(0, 1);
        //3.平移(y轴不动,x轴由离自己右侧2个宽度的距离,回到初始位置)
        TranslateAnimation translateAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 2,
                Animation.RELATIVE_TO_SELF, 0,
                Animation.RELATIVE_TO_SELF, 0,
                Animation.RELATIVE_TO_SELF, 0);
        //4.动画的集合
        AnimationSet animationSet = new AnimationSet(false);
        animationSet.addAnimation(rotateAnimation);
        animationSet.addAnimation(alphaAnimation);
        animationSet.addAnimation(translateAnimation);
        animationSet.setDuration(500);

        btn_jian.startAnimation(animationSet);
        btn_jian.setVisibility(View.VISIBLE);
        viewById .setVisibility(View.VISIBLE);
    }

    //获取此view(点击的加号)在屏幕上的xy坐标的方法
    int[] sourceLocation = new int[2];
    view.getLocationInWindow(sourceLocation);
    Log.i("","x轴坐标  sourceLocation[0] = "+sourceLocation[0]);
    Log.i("","y轴坐标  sourceLocation[1] = "+sourceLocation[1]);

    //在点击的加号的位置,添加一个用于飞行图片
    ImageView imageView = new ImageView(view.getContext());
    imageView.setBackgroundResource(R.drawable.address_add_btn_icon);
}
}

测试

<com.example.shopcar2.AddView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/adds"
     />