我們在安卓開發中安卓自帶的控制元件滿足不了我們的需求，因此我們就需要用到自定義View來滿足我們的需求，在這裡我要講解的是自定義View實現選座功能，在安卓中一個會使用自定義View的人一定會開發出與眾不同以及美觀的專案
首先，我展示一下效果

以上主要就是我們需要建立一個我們自己的View繼承自Viewgroup控制元件並實現onMeasure以及onDraw方法
具體的程式碼是這樣的

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是我們根據選座介面中的返回值判斷座位是否已經被選，大家可以參考一下我的Bean類，但具體的做法還要以自己的介面檔案為主

public static class ResultBean {
    /**
     * row : 1
     * seat : 1
     * status : 2
     */

    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,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,new Paint());
        left = seat;
        top = row;
        right = seat+width;
        bottom = row+height;
      }
    }
  }
}

最後，我們需要在佈局檔案裡進行呼叫，我的佈局檔案是這樣的

<?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="請開始選座購票"
    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="未選座"
      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="已選座"
      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>

以上就是我的選座功能實現的全過程，歡迎大家提問

總結

到此這篇關於Android自定義View實現選座功能的文章就介紹到這了,更多相關android自定義view選座內容請搜尋我們以前的文章或繼續瀏覽下面的相關文章希望大家以後多多支援我們！