遥控器源码

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RadialGradient;
import android.graphics.Region;
import android.graphics.Shader;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;import androidx.annotation.Nullable;import com.anbao.monitor.robot.schemas.Direction;/*** 方向盘控制*/
public class SteeringView extends View {private Paint paint;//第1个圆颜色private int circle1Color = Color.WHITE;//第2个圆颜色private int circle2Color = Color.parseColor("#4D5D6E");//第3个圆颜色private int circle3Color = Color.WHITE;//第4个圆颜色private int circle4Color = Color.GRAY;//线条颜色private int strokeColor = Color.WHITE;//左边三角形颜色private int leftTriangleColor = Color.WHITE;//右边三角形颜色private int rightTriangleColor = Color.WHITE;//上边三角形颜色private int topTriangleColor = Color.WHITE;//下边三角形颜色private int bottomTriangleColor = Color.WHITE;//第一个圆和第二个圆间距private float padding = 8;//线条宽度private float strokeWidth = 5;//第三个圆比例private float circle3RadiusFactor = 0.4f;//第4个圆比例private float circle4RadiusFactor = 0.3f;//三角形边长private float triangleLength = 100;//三角形和第二个圆间距private float trianglePadding = 90;//中心Xprivate float cx;//中心Yprivate float cy;//半径private float radius;//高度protected float height;//左点击区域private Region leftRegion;//右点击区域private Region rightRegion;//上点击区域private Region topRegion;//下点击区域private Region bottomRegion;public SteeringView(Context context) {this(context, null);}public SteeringView(Context context, @Nullable AttributeSet attrs) {this(context, attrs, 0);}public SteeringView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);paint = new Paint();paint.setAntiAlias(true);paint.setColor(circle2Color);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);height = getMeasuredHeight();radius = Math.min(getMeasuredHeight(), getMeasuredWidth()) / 2f;cx = getMeasuredWidth() / 2f;cy = getMeasuredHeight() / 2f;trianglePadding = radius * 0.2f;triangleLength = radius * 0.22f;}@Overridepublic boolean onTouchEvent(MotionEvent event) {float x = event.getX();float y = event.getY();switch (event.getAction()) {case MotionEvent.ACTION_DOWN:if (leftRegion.contains((int) x, (int) y)) {leftTriangleColor = Color.RED;onSteeringDirection(Direction.LEFT);} else if (rightRegion.contains((int) x, (int) y)) {rightTriangleColor = Color.RED;onSteeringDirection(Direction.RIGHT);} else if (topRegion.contains((int) x, (int) y)) {topTriangleColor = Color.RED;onSteeringDirection(Direction.FORWARD);} else if (bottomRegion.contains((int) x, (int) y)) {bottomTriangleColor = Color.RED;onSteeringDirection(Direction.BACKWARDS);}break;case MotionEvent.ACTION_UP:leftTriangleColor = Color.WHITE;rightTriangleColor = Color.WHITE;topTriangleColor = Color.WHITE;bottomTriangleColor = Color.WHITE;break;}invalidate();return true;}/*** 方向控制** @param direction 方向*/private void onSteeringDirection(Direction direction) {//左转if (direction == Direction.LEFT) {}//右转else if (direction == Direction.RIGHT) {}//前进else if (direction == Direction.FORWARD) {}//后退else if (direction == Direction.BACKWARDS) {}}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);paint.setShader(null);//外圆paint.setStyle(Paint.Style.FILL);paint.setColor(circle1Color);canvas.drawCircle(cx, cy, radius, paint);//内圆paint.setColor(circle2Color);canvas.drawCircle(cx, cy, radius - padding, paint);//中心圆paint.setColor(circle3Color);canvas.drawCircle(cx, cy, radius * circle3RadiusFactor, paint);//左->右斜线paint.setColor(strokeColor);paint.setStrokeWidth(strokeWidth);float radians = (float) Math.toRadians(45);float lsx = cx - (float) ((radius - padding) * Math.cos(radians));float lsy = height / 2.0f - (float) ((radius - padding) * Math.sin(radians));float lex = cx + (float) ((radius - padding) * Math.cos(radians));float ley = height / 2.0f + (float) ((radius - padding) * Math.sin(radians));canvas.drawLine(lsx, lsy, lex, ley, paint);//右->左斜线float rsx = cx + (float) ((radius - padding) * Math.cos(radians));float rsy = height / 2.0f - (float) ((radius - padding) * Math.sin(radians));float rex = cx - (float) ((radius - padding) * Math.cos(radians));float rey = height / 2.0f + (float) ((radius - padding) * Math.sin(radians));canvas.drawLine(rsx, rsy, rex, rey, paint);//绘制左边箭头drawLeftTriangle(canvas);//绘制右边箭头drawRightTriangle(canvas);//绘制上方箭头drawTopTriangle(canvas);//绘制下方箭头drawBottomTriangle(canvas);//按下区域leftRegion = buildLeftRegion();rightRegion = buildRightRegion();topRegion = buildTopRegion();bottomRegion = buildBottomRegion();//外发光圆int[] colors = {Color.TRANSPARENT, circle4Color};float[] stops = {0.3f, 1.0f};RadialGradient gradient = new RadialGradient(cx, cy, radius * 0.3f, colors, stops, Shader.TileMode.CLAMP);paint.setShader(gradient);canvas.drawCircle(cx, cy, radius * circle4RadiusFactor, paint);}/*** 绘制左边三角形** @param canvas*/private void drawLeftTriangle(Canvas canvas) {paint.setStrokeCap(Paint.Cap.ROUND);paint.setStyle(Paint.Style.FILL);paint.setColor(leftTriangleColor);Path path = new Path();path.moveTo(cx - radius + trianglePadding, cy);path.lineTo(cx - radius + trianglePadding + triangleLength, cy - triangleLength / 2f);path.lineTo(cx - radius + trianglePadding + triangleLength, cy + triangleLength / 2f);path.lineTo(cx - radius + trianglePadding, cy);canvas.drawPath(path, paint);}/*** 绘制右边三角形** @param canvas*/private void drawRightTriangle(Canvas canvas) {paint.setStrokeCap(Paint.Cap.ROUND);paint.setStyle(Paint.Style.FILL);paint.setColor(rightTriangleColor);Path path = new Path();path.moveTo(cx + radius - trianglePadding, cy);path.lineTo(cx + radius - trianglePadding - triangleLength, cy - triangleLength / 2f);path.lineTo(cx + radius - trianglePadding - triangleLength, cy + triangleLength / 2f);path.lineTo(cx + radius - trianglePadding, cy);canvas.drawPath(path, paint);}/*** 绘制上方三角形** @param canvas*/private void drawTopTriangle(Canvas canvas) {paint.setStrokeCap(Paint.Cap.ROUND);paint.setStyle(Paint.Style.FILL);paint.setColor(topTriangleColor);Path path = new Path();path.moveTo(cx, cy - radius + trianglePadding);path.lineTo(cx + triangleLength / 2f, cy - radius + trianglePadding + triangleLength);path.lineTo(cx - triangleLength / 2f, cy - radius + trianglePadding + triangleLength);path.lineTo(cx, cy - radius + trianglePadding);canvas.drawPath(path, paint);}/*** 绘制下方箭头** @param canvas*/private void drawBottomTriangle(Canvas canvas) {paint.setStrokeCap(Paint.Cap.ROUND);paint.setStyle(Paint.Style.FILL);paint.setColor(bottomTriangleColor);Path path = new Path();path.moveTo(cx, cy + radius - trianglePadding);path.lineTo(cx + triangleLength / 2f, cy + radius - trianglePadding - triangleLength);path.lineTo(cx - triangleLength / 2f, cy + radius - trianglePadding - triangleLength);path.lineTo(cx, cy + radius - trianglePadding);canvas.drawPath(path, paint);}/*** 构建左边区域** @return*/private Region buildLeftRegion() {Region region = new Region();Path path = new Path();path.moveTo(cx, cy);path.addArc(cx - radius, cy - radius, cx + radius, cy + radius, -135, -90);path.lineTo(cx, cy);paint.setColor(Color.RED);Region clip = new Region((int) (cx - radius), (int) (cy - radius), (int) (cx - radius * circle3RadiusFactor), (int) (cy + radius));region.setPath(path, clip);return region;}/*** 构建右边区域** @return*/private Region buildRightRegion() {Region region = new Region();Path path = new Path();path.moveTo(cx, cy);path.addArc(cx - radius, cy - radius, cx + radius, cy + radius, -45, 90);path.lineTo(cx, cy);paint.setColor(Color.RED);Region clip = new Region((int) (cx + radius * circle3RadiusFactor), (int) (cy - radius), (int) (cx + radius), (int) (cy + radius));region.setPath(path, clip);return region;}/*** 构建上方区域** @return*/private Region buildTopRegion() {Region region = new Region();Path path = new Path();path.moveTo(cx, cy);path.addArc(cx - radius, cy - radius, cx + radius, cy + radius, -45, -90);path.lineTo(cx, cy);paint.setColor(Color.RED);Region clip = new Region((int) (cx - radius), (int) (cy - radius), (int) (cx + radius), (int) (cy - radius * circle3RadiusFactor));region.setPath(path, clip);return region;}/*** 构建下方区域** @return*/private Region buildBottomRegion() {Region region = new Region();Path path = new Path();path.moveTo(cx, cy);path.addArc(cx - radius, cy - radius, cx + radius, cy + radius, 45, 90);path.lineTo(cx, cy);paint.setColor(Color.RED);Region clip = new Region((int) (cx - radius), (int) (cy + radius * circle3RadiusFactor), (int) (cx + radius), (int) (cy + radius));region.setPath(path, clip);return region;}}