Android下图片变圆角的代码封装，,main.xml<?xm

Android下图片变圆角的代码封装，,main.xml

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/layout"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <!-- <com.lian.image.SetImage        android:id="@+id/show"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /> -->    <ListView        android:id="@+id/listview"        android:layout_width="wrap_content"        android:layout_height="fill_parent"        android:layout_marginLeft="50dp"        android:cacheColorHint="#000"        android:divider="#000"        android:dividerHeight="5px"        android:fadingEdge="none"        android:scrollbars="none"        android:scrollingCache="true" /></LinearLayout>

                                package com.lian.image;

import android.content.Context;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Path;import android.graphics.PixelFormat;import android.graphics.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.RectF;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.widget.ImageView;public class SetImage extends ImageView {    public SetImage(Context context) {        super(context);        // TODO Auto-generated constructor stub    }    public SetImage(Context context, AttributeSet attrs) {        super(context, attrs, 0);    }    protected void onDraw(Canvas canvas) {        // TODO Auto-generated method stub            Path clipPath = new Path();              int w = this.getWidth();              int h = this.getHeight();              clipPath.addRoundRect(new RectF(0, 0, w, h), 10.0f, 10.0f, Path.Direction.CW);              canvas.clipPath(clipPath);              super.onDraw(canvas);    }    public void setImageDrawable(Drawable drawable, int pixels) {        // TODO Auto-generated method stub         Bitmap bitmap =toRoundCorner(drawableToBitmap(drawable), pixels);           Drawable drawable1 = new BitmapDrawable(bitmap);           super.setImageDrawable(drawable1);          }    public void setImageBitmap(Drawable drawable, int pixels) {             // TODO Auto-generated method stub        super.setImageBitmap(toRoundCorner(drawableToBitmap(drawable), pixels));    }    public static Bitmap toRoundCorner(Bitmap bitmap, int pixels) {        //创建一个和原始图片一样大小位图        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),                bitmap.getHeight(), Config.ARGB_8888);        //创建带有位图bitmap的画布        Canvas canvas = new Canvas(output);        final int color = 0xff424242;        //创建画笔        final Paint paint = new Paint();        //创建一个和原始图片一样大小的矩形        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());        final RectF rectF = new RectF(rect);        final float roundPx = pixels;         // 去锯齿        paint.setAntiAlias(true);        canvas.drawARGB(0, 0, 0, 0);        paint.setColor(color);         //画一个和原始图片一样大小的圆角矩形        canvas.drawRoundRect(rectF, roundPx, roundPx, paint);          //设置相交模式        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));        //把图片画到矩形去        canvas.drawBitmap(bitmap, rect, rect, paint);        return output;    }    public static Bitmap drawableToBitmap(Drawable drawable){        int width = drawable.getIntrinsicWidth();         int height = drawable.getIntrinsicHeight();         //创建一个和原始图片一样大小位图         Bitmap bitmap = Bitmap.createBitmap(width, height,         drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888         : Bitmap.Config.RGB_565);//创建一个指定高、宽的可变的Bitmap图像        //创建带有位图bitmap的画布         Canvas canvas = new Canvas(bitmap);         drawable.setBounds(0,0,width,height);         drawable.draw(canvas);         return bitmap;         }}

                                package com.lian.image;

import java.util.ArrayList;import java.util.HashMap;import android.app.Activity;import android.content.Context;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ListView;public class SetDrawable extends Activity {     private ArrayList<HashMap<String,Object>> data;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        /* Drawable drawable1 = getResources().getDrawable(R.drawable.benchi1);                   SetImage imageView1 = (SetImage) findViewById(R.id.show);                   imageView1.setImageDrawable(drawable1, 20);                   imageView1.setImageBitmap(drawable1, 20);*/        data = getData();                                                  ListView list = (ListView)findViewById(R.id.listview);        MyAdapter adapter = new MyAdapter(SetDrawable.this, data, R.layout.list);         list.setAdapter(adapter);     }    private ArrayList<HashMap<String,Object>> getData(){                 ArrayList<HashMap<String,Object>> list = new ArrayList<HashMap<String,Object>>();            HashMap<String,Object> map = new HashMap<String,Object>();               for(int i = 0 ; i<100 ; i++){                   map.put("show",R.drawable.benchi1);                                  list.add(map);                             }               return list;     }    class ViewHolder{        public SetImage image;          }class MyAdapter extends BaseAdapter{        //定义一个LayoutInflater来导入资料文件        LayoutInflater inflater;        //用来接管要绑定的数据         ArrayList<HashMap<String,Object>> arrayList;        //要绑定的资料文件id         int resID;                                          public MyAdapter(Context context,                ArrayList<HashMap<String, Object>> arrayList, int resID) {            this.inflater = LayoutInflater.from(context);            this.arrayList = arrayList;            this.resID = resID;        }        //绑定的数据的长度，也就是ListView项的个数        @Override        public int getCount() {            // TODO Auto-generated method stub            return  this.arrayList.size();        }        @Override        public Object getItem(int position) {            // TODO Auto-generated method stub            return null;        }        @Override        public long getItemId(int position) {            // TODO Auto-generated method stub            return 0;        }        @Override        public View getView(final int position, View convertView, ViewGroup parent) {            //创建一个ViewHolder来盛放控件            ViewHolder vHolder;            //经由过程断定convertView是否为空来取得ViewHolder对象            //这个convertView就是ListView的一行            if (convertView == null) {                //若是为null则从布局文件中导入                convertView=inflater.inflate(resID, null);                vHolder=new ViewHolder();                vHolder.image = (SetImage)convertView.findViewById(R.id.show);                                                              //setTag办法用来设置与视图接洽关系的标签，我的懂得就是把和它相干的ViewHolder存储起来，到用的时候再拿出来                convertView.setTag(vHolder);            }            else{                //若是不为null就直接经由过程getTag取出来                vHolder = (ViewHolder)convertView.getTag();            }            //然后给ViewHolder对象的每一项赋值  s                Drawable drawable1 = getResources().getDrawable(R.drawable.benchi1);                vHolder.image.setImageBitmap(drawable1, 20);                      return convertView;        }   }}

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