效果图:
主要代码:
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
@SuppressLint("ClickableViewAccessibility")
public class SignView extends View {
private Canvas mCanvas;
private Paint mPaint;
private Path mPath;
private Bitmap mBitmap;
private Paint mBitmapPaint;
private int mX;
private int mY;
private