Android自定义View实现选座功能

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 mlist;
  public void setData(ArrayList 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=left&&x=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

以上就是我的选座功能实现的全过程，欢迎大家提问

总结

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