Mega Code Archive
Finger Paint View
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//package com.aflyroc.doodle.view;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.graphics.Paint.FontMetrics;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
public class FingerPaintView extends View {
Path path;
Bitmap bitmapBuff;
Paint paint;
Paint pen;
Canvas canvas;
Bitmap originBitmap;
Bitmap pureBitmp;
private float scaleWidth;
private float scaleHeight;
private float mX,mY;
private static float TOUCH_TOLERANCE = 4;
private Canvas printCanvas;
Bitmap printBitmapBuff;
private List<Path> pathList;
int i = 0;
public FingerPaintView(Context context, AttributeSet attrs) {
super(context, attrs);
loadBitmap(context);
Log.i("Context context, AttributeSet attrs", "11");
}
public FingerPaintView(Context context) {
super(context);
loadBitmap(context);
Log.i("Context context", "222");
}
public void loadBitmap(Context context) {
pathList = new ArrayList<Path>();
path = new Path();
paint = new Paint();
paint.setAntiAlias(true);
paint.setDither(true);
paint.setColor(Color.RED);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeCap(Paint.Cap.ROUND);
paint.setStrokeWidth(1.6f);
InputStream stream = null;//getResources().openRawResource(drawable.precheck);
originBitmap = BitmapFactory.decodeStream(stream);
int width = originBitmap.getWidth();
int height = originBitmap.getHeight();
DisplayMetrics metrics = context.getApplicationContext().getResources().getDisplayMetrics();
int newWidth = metrics.widthPixels;
int newHeight = metrics.heightPixels;
// ¼ÆËãËõ·ÅÂʣ¬Â³ß´ç³ýÔÂʼ³ß´ç
scaleWidth = ((float) newWidth / width);
scaleHeight = ((float) newHeight / height);
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
pureBitmp = Bitmap.createBitmap(originBitmap, 0, 0, width, height,matrix, true);
bitmapBuff = Bitmap.createBitmap(pureBitmp.getWidth(),pureBitmp.getHeight(), Bitmap.Config.ARGB_8888);
canvas = new Canvas(bitmapBuff);
canvas.drawBitmap(pureBitmp, 0, 0, paint);
}
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touchStart(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touchMove(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touchUp(x, y);
invalidate();
break;
}
return true;
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// »æÖƼñ
canvas.drawBitmap(bitmapBuff, 0, 0, paint);
// »æÖƼÃ
canvas.drawPath(path, paint);
}
private void touchStart(float x, float y)
{
path.reset();
path.moveTo(x, y);
mX = x;
mY=y;
}
private void touchMove(float x,float y)
{
float dx = Math.abs(x-mX);
float dy = Math.abs(y-mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
path.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
mX = x;
mY = y;
}
}
private void touchUp(float x,float y)
{
pathList.add(new Path(path));
canvas.drawPath(path,paint);
path.reset();
}
public void createPrintCanvas()
{
Bitmap printBitmap = Bitmap.createBitmap(originBitmap);
printBitmapBuff = Bitmap.createBitmap(printBitmap.getWidth(),printBitmap.getHeight(), Bitmap.Config.ARGB_8888);
Matrix matrix = new Matrix();
matrix.postScale(1/scaleWidth, 1/scaleHeight);
printCanvas = new Canvas(printBitmapBuff);
printCanvas.drawBitmap(printBitmap, 0, 0, paint);
for(int i=0;i<pathList.size();i++)
{
Path tempPath = new Path(pathList.get(i));
tempPath.transform(matrix);
printCanvas.drawPath(tempPath, paint);
Log.d("path", tempPath.toString());
}
printCanvas.save();
}
public float getScaleWidth() {
return scaleWidth;
}
public float getScaleHeight() {
return scaleHeight;
}
}
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