ShapeDrawable放大镜的案例

最新推荐文章于 2024-01-26 11:25:27 发布

转载最新推荐文章于 2024-01-26 11:25:27 发布 · 1.7k 阅读

文章标签：

#matrix #float #colors #null #shader #fp

本文介绍了一种使用ShapeDrawable和BitmapShader实现在圆形区域内放大图像的方法。通过设置Shader来控制显示区域形状，适用于需要特定形状放大效果的应用场景。

[MickleZcg]

http://bbs.ldci.com.cn/simple/?t3094.html

ShapeDrawable放大镜的案例

放大镜的案例

如果要在圆形区域放大，一种解决的办法是切出圆形的图在放大。一种是最好能够有设定任意形状的可显示区域，找了老半天也没找到。

觉得要动用C的CGI技术的时候，我想到了ShapeDrawable，ShapeDrawable是可以设置画的形状的。但不知道他有没有可以设置要画的像素组，查了一下，真是惊喜万分啊。shape.getPaint().setShader()可以设置 Shader，Shader可以接受一个图像的数据，通过BitmapShader(Bitmap, Shader.TileMode.REPEAT,
Shader.TileMode.REPEAT);可以得到Shader，通过这两个方法我实现了在圆形区域显示图像的要求
现在贡献我的代码

package com.ui;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View;
import android.graphics.Matrix;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Bitmap;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Region;
import android.graphics.Rect;
import com.util.Tools;
import android.graphics.drawable.PaintDrawable;
import android.util.Log;
import com.main.main;
import com.main.R;
import android.graphics.MaskFilter;
import android.graphics.EmbossMaskFilter;
import android.graphics.Path;
import android.graphics.BlurMaskFilter;
import android.graphics.BitmapFactory;
import android.graphics.RectF;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.ShapeDrawable.ShaderFactory;
import android.graphics.drawable.shapes.Shape;
import android.graphics.drawable.shapes.OvalShape;
import android.graphics.BitmapShader;
import android.graphics.Shader;
public class FaceView extends View
{
private float rectx=20;
private float recty=20;
private Bitmap bmp[]=new Bitmap[1];
private Bitmap fp=null;
private Bitmap bmp2=null;
private Bitmap tmp[]=new Bitmap[1];
private EmbossMaskFilter filter=null;
protected static final String ACTIVITY_TAG="FaceView";
private float fangda=1;
private float dushu[]=new float[]{0,30,60,90};
private int index=0;
private int peishu=1;
private boolean isfandasuoxiao=true;
private main main=null;
public void setMain(main main) {
this.main = main;
//this.getContext().
}
// private Matrix rx=null;
Paint p;
// private ShapeDrawable drawable =null;
public FaceView(android.content.Context context){
super(context);
// context.c
// this.c.
// context.deleteDatabase(arg0)
//context.openOrCreateDatabase(arg0, arg1, arg2)
p=new Paint();
p.setColor(-1);
// context.
fp=BitmapFactory.decodeResource( this.getResources(), R.drawable.fd);
//p.setMaskFilter(maskfilter)
// p.
//rx = new Matrix();
// setLongClickable(true);
// this.setOnTouchListener(this);
// RectShape r= new RectShape() ;
//=new ShapeDrawable(new RectShape() );
//.getPaint().setColor(-1);
}
public Bitmap makeDst(int w, int h) {
Bitmap bmy =this.bmp2;
Paint py = new Paint(Paint.ANTI_ALIAS_FLAG);
Canvas c = new Canvas(bmy);
py.setColor(-1);
py.setStyle(Style.STROKE);
py.setAlpha(50);
c.drawOval(new RectF(0, 0, this.bmp2.getWidth()*3/4, this.bmp2.getHeight()*3/4), py);
c.setBitmap(bmy);
return bmy;
}
private Shader makeTiling() {
return new BitmapShader(this.bmp2, Shader.TileMode.REPEAT,
Shader.TileMode.REPEAT);
}
public ShapeDrawable drawbmp(){
ShapeDrawable shape=new ShapeDrawable(new OvalShape());
shape.getPaint().setShader(makeTiling());
return shape;
}
public void setBitmap(Bitmap bmp) {
this.bmp[0]=bmp;
System.arraycopy(this.bmp,0 ,this.tmp , 0, 1);
fangda=1;
// dushu=0;
peishu=1;
// chang_Bmp();
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
p.setStyle(Style.STROKE);
//p.
//.d
if(this.bmp[0]!=null){
canvas.drawBitmap(this.bmp[0], 0, 0, new Paint());
Rect oldrect=canvas.getClipBounds();
//canvas.clipRegion(region)
canvas.drawText("放大", 2, this.getHeight()-30, p);
canvas.drawText("缩小", 80, this.getHeight()-30, p);
canvas.drawText("旋转", 150, this.getHeight()-30, p);
canvas.drawText("退出", this.getWidth()-40, this.getHeight()-30, p);
//canvas.
if(bmp2!=null){
// canvas.clipRect(rectx, recty, rectx+180, recty+180, Op.DIFFERENCE);
//canvas.
//canvas.d
//canvas.clipRegion(region)
//this.bmp2.extractAlpha(pt, new int[]{(int)rectx+50,(int)recty+50});
//canvas.drawBitmap(drawbmp(), rectx+8, recty+8, new Paint());
ShapeDrawable sha= drawbmp();
sha.setBounds((int)rectx, (int)recty, (int)rectx+fp.getWidth(), (int)recty+fp.getWidth());
sha.draw(canvas);
//canvas.drawVertices(mode, vertexCount, verts, vertOffset, texs, texOffset, colors, colorOffset, indices, indexOffset, indexCount, paint)
//.drawBitmap(this.bmp2, rectx, recty, new Paint());
//canvas.drawBitmapMesh(bitmap, meshWidth, meshHeight, verts, vertOffset, colors, colorOffset, paint)
}
float[] tempArr={200,10,100};
Paint tp=new Paint();
tp.setStyle(Style.STROKE);
tp.setColor(-1);
tp.setAlpha(100);
EmbossMaskFilter emm =new EmbossMaskFilter(tempArr,0.5f,100,10.5f);
tp.setMaskFilter(emm);
// tp.
//canvas.drawRect(rectx, , (rectx+180)*3/4, (recty+180)*3/4, tp);
canvas.drawCircle(rectx+fp.getWidth()/2, recty+fp.getWidth()/2, fp.getWidth()/2,tp);
canvas.drawBitmap(this.fp, rectx, recty, new Paint());
//canvas.c
//canvas.drawBitmapMesh(bitmap, meshWidth, meshHeight, verts, vertOffset, colors, colorOffset, paint)
// canvas.drawBitmap(makeDst(50,50), 10,10,new Paint());
//canvas.drawBitmap(fp, rectx, recty, new Paint());
//canvas.drawRect(rectx, recty, rectx+180, recty+180, p);
//canvas.drawRect(rectx+2, recty+2, rectx+180-2, recty+180-2, p);
// canvas.clipRect(oldrect);
}
//canvas.
//drawable.setBounds(20, 20, 250, 250);
//drawable.draw(canvas);
//p.
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
return super.onKeyUp(keyCode, event);
}
@Override
public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
// TODO Auto-generated method stub
return super.onKeyMultiple(keyCode, repeatCount, event);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch(event.getAction()){
case MotionEvent.ACTION_DOWN:
if( event.getY()<this.getHeight()-40 ){
this.rectx=event.getX();
this.recty=event.getY()-15;
if(this.rectx+180>=this.bmp[0].getWidth()){
this.rectx= this.bmp[0].getWidth()-180;
}
if(this.recty+180>=this.bmp[0].getHeight()){
this.recty=this.bmp[0].getHeight()-180;
}
chang_Bmp();
//this.bmp2=Tools.effect_cut(bmp3, ((int)this.rectx* (int)this.fangda+2), ((int)this.recty* (int)this.fangda+2), 100-2, 100-2);
Log.i(FaceView.ACTIVITY_TAG, "msg"+this.rectx);}else{
if(event.getRawX()>=2 && event.getRawX()<=40 && event.getRawY()<this.getHeight() && event.getRawY()>=this.getHeight()-40 ){
isfandasuoxiao=true;
if(this.fangda>=1){
this.peishu++;
if(this.peishu>=5){
this.peishu=5;
}
this.fangda=1*(float)this.peishu;}else{
this.peishu--;
if(this.peishu<=1){
this.peishu=1;
}
this.fangda=1/(float)this.peishu;
}
chang_Bmp();
}else if(event.getRawX()>=80 && event.getRawX()<=80+40 && event.getRawY()<this.getHeight() && event.getRawY()>=this.getHeight()-40){
isfandasuoxiao=false;
if(this.fangda>1){
this.peishu--;
if(this.peishu<=1){
this.peishu=1;
}
this.fangda=1*(float)this.peishu;}
chang_Bmp();
}else if(event.getRawX()>=150 && event.getRawX()<=150+40 && event.getRawY()<this.getHeight() && event.getRawY()>=this.getHeight()-40){
index++;
Matrix rx = new Matrix();
this.bmp2=null;
if(this.index>this.dushu.length-1){
this.index=0;
System.arraycopy(this.tmp,0 ,this.bmp , 0, 1);
}else{
rx.postRotate(this.dushu[this.index]);
bmp[0]=Bitmap.createBitmap(bmp[0], 0, 0, bmp[0].getWidth(), bmp[0].getHeight(), rx, true);
}
//rx.p
//Bitmap bmp3=Tools.effect_cut(bmp1[0], ((int)this.rectx+2), ((int)this.recty+2), 100-2, 100-2);//切图片ue
}else if(event.getRawX()>=this.getWidth()-40 && event.getRawX()<=this.getWidth() && event.getRawY()<this.getHeight() && event.getRawY()>=this.getHeight()-40){
this.main.finish();
}
}
this.postInvalidate();
break;
}
return super.onTouchEvent(event);
}
public void chang_Bmp(){
Bitmap bmp1[]=new Bitmap[1];
System.arraycopy(bmp,0 ,bmp1 , 0, 1);
if(this.fangda>0){
Matrix rx = new Matrix();
rx.postScale(this.fangda, this.fangda);
//rx.postSkew(0, 10, 5, 6);
//Bitmap bmp3=Tools.effect_cut(bmp1[0], ((int)this.rectx+2), ((int)this.recty+2), 100-2, 100-2);//切图片ue
Bitmap bmp3=Bitmap.createBitmap(bmp1[0], 0, 0, bmp1[0].getWidth(), bmp1[0].getHeight(),rx,true);
//Bitmap.
this.bmp2=Bitmap.createBitmap(bmp3, (int)this.rectx*this.peishu, (int)this.recty*this.peishu, fp.getWidth(), fp.getWidth());
//this.bmp2=Tools.effect_hoodwink(this.bmp2);
}else{
Bitmap bmp3=Tools.effect_resizeImage(bmp1[0], bmp1[0].getWidth()/this.peishu, bmp1[0].getHeight()/this.peishu);
this.bmp2=Bitmap.createBitmap(bmp3, ((int)this.rectx/ (int)this.peishu+2), ((int)this.recty/(int)this.peishu+2), fp.getWidth(), fp.getWidth());
this.bmp2=Tools.effect_hoodwink(this.bmp2);
}
}
@Override
public boolean onKeyShortcut(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
return super.onKeyShortcut(keyCode, event);
}
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
}