public class HighLightLayout extends FrameLayout {  private Paint mPaint;  private Path mPath = new Path();  private List<RectRegion> mRegions;  public HighLightLayout(@NonNull Context context, @Nullable AttributeSet attrs) {    super(context, attrs);    mPaint = new Paint();    mPaint.setAntiAlias(true);    mPaint.setColor(0xAA000000);    setWillNotDraw(false);  }  @Override  protected void onDraw(Canvas canvas) {    mPath.reset();    mPath.addRect(0, 0, getWidth(), getHeight(), Path.Direction.CCW);    for (RectRegion region : mRegions) {      RectF rectF = region.rectF;      if (region instanceof RoundRectRegion) {        RoundRectRegion roundRectRegion = (RoundRectRegion) region;        mPath.addRoundRect(rectF, roundRectRegion.rx, roundRectRegion.ry,               Path.Direction.CW);      } else if (region instanceof CircleRegion) {        CircleRegion circleRegion = (CircleRegion) region;        float cX = (rectF.right + rectF.left) / 2;        float cY = (rectF.bottom + rectF.top) / 2;        mPath.addCircle(cX, cY, circleRegion.radius, Path.Direction.CW);      } else if (region instanceof OvalRegion) {        mPath.addOval(rectF, Path.Direction.CW);      } else {        mPath.addRect(rectF, Path.Direction.CW);      }    }    canvas.drawPath(mPath, mPaint);  }  public void setRegion(@NonNull RectRegion region) {    if (mRegions == null) {      mRegions = new ArrayList<>();    } else {      mRegions.clear();    }    mRegions.add(region);    invalidate();  }  public void setRegions(@NonNull List<RectRegion> regions) {    mRegions = regions;    invalidate();  }  @Override  public void setBackgroundColor(int color) {    mPaint.setColor(color);  }}

public class RectRegion implements Parcelable {  public RectF rectF;  //... Parcelable實現代碼}

public class RoundRectRegion extends RectRegion {  public float rx, ry;  //... Parcelable實現代碼}

public class CircleRegion extends RectRegion {  public float radius;  //... Parcelable實現代碼}

public class OvalRegion extends RectRegion {  //... Parcelable實現代碼}

<wangyi.blog.app.view.HighLightLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:id="@+id/highLightLayout"  android:layout_width="match_parent"  android:layout_height="match_parent"  tools:context=".GuideActivity"></wangyi.blog.app.view.HighLightLayout>

ArrayList<RectRegion> regions = new ArrayList<>();    //矩形高亮    RectF rectF1 = LocationUtils.getViewLocation(mButton1);    RectRegion region1 = new RectRegion(rectF1);    regions.add(region1);    //圓角矩形高亮    RectF rectF2 = LocationUtils.getViewLocation(mButton2);    RoundRectRegion region2 = new RoundRectRegion(rectF2, 10, 10);    regions.add(region2);    //圓形高亮    RectF rectF3 = LocationUtils.getViewLocation(mButton3);    float radius = (rectF3.right - rectF3.left) / 2 + 20;    CircleRegion region3 = new CircleRegion(rectF3, radius);    regions.add(region3);    //橢圓高亮    RectF rectF4 = LocationUtils.getViewLocation(mButton4);    LocationUtils.expandRectF(rectF4, 40);    OvalRegion region4 = new OvalRegion(rectF4);    regions.add(region4);    Intent intent = new Intent(this, GuideActivity.class);    intent.putExtra(GuideActivity.EXTRA_REGION_LIST, regions);    startActivity(intent);

ArrayList<RectRegion> regions = getIntent().getParcelableArrayListExtra(EXTRA_REGION_LIST);    HighLightLayout highLightLayout = findViewById(R.id.highLightLayout);    highLightLayout.setRegions(regions);