我们在安卓开发中安卓自带的控件满足不了我们的需求，因此我们就需要用到自定义View来满足我们的需求，在这里我要讲解的是自定义View实现选座功能，在安卓中一个会使用自定义View的人一定会开发出与众不同以及美观的项目
首先，我展示一下效果
以上主要就是我们需要创建一个我们自己的View继承自Viewgroup控件并实现onMeasure以及onDraw方法
具体的代码是这样的

public class SearView extends ViewGroup {
    private Context context;
    public SearView(@NonNull Context context) {
        super(context);
    }

    public SearView(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        this.context=getContext();
    }

    public SearView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {

    }


    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    }
    private ArrayList<SeatinfoBean.ResultBean> mlist;
    public void setData(ArrayList<SeatinfoBean.ResultBean> list){
        this.mlist = list;
        invalidate();
    }


    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (mlist != null && mlist.size() > 0) {
            for (int i = 0; i < mlist.size(); i++) {
                SeatinfoBean.ResultBean resultBean = mlist.get(i);
                resultBean.draw(canvas,context);
            }
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()){
            case MotionEvent.ACTION_DOWN:

                break;
            case MotionEvent.ACTION_MOVE:
                break;
            case MotionEvent.ACTION_UP:

                float x = event.getX();
                float y = event.getY();
                completeByXY(x,y);
                break;
        }
        return true;
    }
    public void completeByXY(float x,float y){
        for (int i=0;i<mlist.size();i++){
            SeatinfoBean.ResultBean resultBean1 = mlist.get(i);
            int left = resultBean1.getLeft();
            int right = resultBean1.getRight();
            int bottom = resultBean1.getBottom();
            int top = resultBean1.getTop();
            if (x>=left&&x<right&&y>=top&&y<=bottom){
                clickedSeat.clickedSeat(resultBean1);
                int status = resultBean1.getStatus();
                if (status==1){
                    status=3;
                    resultBean1.setStatus(status);
                }else if (status==3){
                    status=1;
                    resultBean1.setStatus(status);
                }
                break;
            }
        }
        postInvalidate();
    }
    public interface ClickedSeat{
        void clickedSeat(SeatinfoBean.ResultBean resultBean);
    }
    private ClickedSeat clickedSeat;

    public void setClickedSeat(ClickedSeat clickedSeat) {
        this.clickedSeat = clickedSeat;
    }
}

以上的resultBean是我们根据选座接口中的返回值判断座位是否已经被选，大家可以参考一下我的Bean类，但具体的做法还要以自己的接口文件为主

public static class ResultBean {
        

        private String row;
        private String seat;
        private int status;
        private int left;
        private int top;
        private int right;
        private int bottom;
        private Context context;
        private boolean ist = false;

        public String getRow() {
            return row;
        }

        public void setRow(String row) {
            this.row = row;
        }

        public String getSeat() {
            return seat;
        }

        public void setSeat(String seat) {
            this.seat = seat;
        }

        public int getStatus() {
            return status;
        }

        public void setStatus(int status) {
            this.status = status;
        }

        public int getLeft() {
            return left;
        }

        public void setLeft(int left) {
            this.left = left;
        }

        public int getTop() {
            return top;
        }

        public void setTop(int top) {
            this.top = top;
        }

        public int getRight() {
            return right;
        }

        public void setRight(int right) {
            this.right = right;
        }

        public int getBottom() {
            return bottom;
        }

        public void setBottom(int bottom) {
            this.bottom = bottom;
        }

        public Context getContext() {
            return context;
        }

        public void setContext(Context context) {
            this.context = context;
        }

        public boolean isIst() {
            return ist;
        }

        public void setIst(boolean ist) {
            this.ist = ist;
        }
        public void draw(Canvas canvas,Context context){
            if (status==2){
                BitmapDrawable drawable = (BitmapDrawable) context.getResources().getDrawable(R.drawable.xuan);
                Bitmap bitmap = drawable.getBitmap();
                int width = bitmap.getWidth();
                int height = bitmap.getHeight();
                int row = Integer.parseInt(getRow());
                int seat = Integer.parseInt(getSeat());
                row = row*50;
                seat = seat*50;
                canvas.drawBitmap(bitmap,seat,row,new Paint());
                left = seat;
                top  = row;
                right = seat+width;
                bottom = row+height;
            }
            if (status==1){
                BitmapDrawable drawable = (BitmapDrawable) context.getResources().getDrawable(R.drawable.xuan1);
                Bitmap bitmap = drawable.getBitmap();
                int width = bitmap.getWidth();
                int height = bitmap.getHeight();
                int row = Integer.parseInt(getRow());
                int seat = Integer.parseInt(getSeat());
                row = row*50;
                seat = seat*50;
                canvas.drawBitmap(bitmap,seat,row,new Paint());
                left = seat;
                top  = row;
                right = seat+width;
                bottom = row+height;
            }
            if (status==3){
                BitmapDrawable drawable = (BitmapDrawable) context.getResources().getDrawable(R.drawable.xuan3);
                Bitmap bitmap = drawable.getBitmap();
                int width = bitmap.getWidth();
                int height = bitmap.getHeight();
                int row = Integer.parseInt(getRow());
                int seat = Integer.parseInt(getSeat());
                row = row*50;
                seat = seat*50;
                canvas.drawBitmap(bitmap,seat,row,new Paint());
                left = seat;
                top  = row;
                right = seat+width;
                bottom = row+height;
            }
        }
    }


}

最后，我们需要在布局文件里进行调用，我的布局文件是这样的

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.XuanZuoActivity"
    android:orientation="vertical">
    <TextView
        android:id="@+id/xuanzuotext"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="请开始选座购票"
        android:background="#140404"
        android:gravity="center"
        android:textSize="@dimen/permission_dp_30"
        android:textColor="#fff"/>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:background="#140404">
        <TextView
            android:id="@+id/weixuan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="未选座"
            android:textColor="#fff"
            android:layout_marginLeft="@dimen/permission_dp_20"
            android:layout_marginTop="@dimen/dp_3"/>
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/xuan1"/>
        <TextView
            android:id="@+id/weixuan2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="已选座"
            android:textColor="#fff"
            android:layout_marginLeft="@dimen/dp_210"
            android:layout_marginTop="@dimen/dp_3"/>
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/xuan"/>
    </LinearLayout>
    <com.bw.movie.SearView
        android:id="@+id/xuanzuo"
        android:background="#140404"
        android:layout_width="match_parent"
        android:layout_height="@dimen/dp_0"
        android:layout_weight="6"
        />
   
    <Button
        android:id="@+id/button_xuanzuo"
        android:layout_width="match_parent"
        android:layout_height="@dimen/dp_0"
        android:layout_weight="0.5"
        android:text="立即支付"
        android:background="#E91E63"/>

</LinearLayout>

以上就是我的选座功能实现的全过程，欢迎大家提问