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 { /** * 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,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

总结

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