Android编程实现在编程实现在Bitmap上涂鸦效果上涂鸦效果
本文实例讲述了Android编程实现在Bitmap上涂鸦效果。分享给大家供大家参考，具体如下：
布局文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/handwriteview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:gravity="center_horizontal" >
<Button
android:id="@+id/clear"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="清屏" />
</LinearLayout>
</LinearLayout>
重写的View文件：
public class HandWrite extends View
{
private Paint paint = null;
private Bitmap originalBitmap = null;
private Bitmap new1Bitmap = null;
private Bitmap new2Bitmap = null;
private float clickX = 0,clickY = 0;
private float startX = 0,startY = 0;
private boolean isMove = true;
private boolean isClear = false;
private int color = Color.GREEN;
private float strokeWidth = 2.0f;
public HandWrite(Context context,Bitmap b)
{
super(context);
originalBitmap = Bitmap.createBitmap(b).copy(Bitmap.Config.ARGB_8888, true);
new1Bitmap = Bitmap.createBitmap(originalBitmap);
}
public void clear(){
isClear = true;
new2Bitmap = Bitmap.createBitmap(originalBitmap);
invalidate();
}
public void setstyle(float strokeWidth){
this.strokeWidth = strokeWidth;
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
canvas.drawBitmap(HandWriting(new1Bitmap), 0, 0,null);
}
public Bitmap HandWriting(Bitmap originalBitmap)
{
Canvas canvas = null;
if(isClear){
canvas = new Canvas(new2Bitmap);
}
else{
canvas = new Canvas(originalBitmap);
}
paint = new Paint();
paint.setStyle(Style.STROKE);
paint.setAntiAlias(true);
paint.setColor(color);
paint.setStrokeWidth(strokeWidth);
if(isMove){
资源评论
