ImageView学习

package liu.roundimagedemo.view;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.drawable.Drawable;

import android.os.Handler;

import android.os.Message;

import android.support.v4.graphics.drawable.RoundedBitmapDrawable;

import android.support.v4.graphics.drawable.RoundedBitmapDrawableFactory;

import android.util.AttributeSet;

import android.widget.ImageView;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

/**

 * Created by 刘楠 on 2016/8/31 0031.22:14

 */

public class NetImageView extends ImageView {

    Bitmap mBitmap;

    /**

     * 是否为圆形

     */

    private boolean isRound = false;

    public void setRound(boolean round) {

        isRound = round;

    }

    Handler mHandler = new Handler(){

        @Override

        public void handleMessage(Message msg) {

            //super.handleMessage(msg);

           if(!isRound){

               setImageBitmap(mBitmap);

               return;

           }

            Drawable drawable =createRoundBitmap(mBitmap);

            setImageDrawable(drawable);

        }

    };

    /**

     * 建立圆形图片

     * @param src

     * @return

     */

    private Drawable createRoundBitmap(Bitmap src) {

        Bitmap dst;

        if(src.getWidth()>src.getHeight()){

            dst = Bitmap.createBitmap(src,src.getWidth()/2-src.getHeight()/2,0,src.getHeight(),src.getHeight());

        }else {

            dst = Bitmap.createBitmap(src,0,src.getHeight()/2-src.getWidth()/2,src.getWidth(),src.getWidth());

        }

        RoundedBitmapDrawable roundedBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(),dst);

        roundedBitmapDrawable.setAntiAlias(true);

        roundedBitmapDrawable.setCornerRadius(dst.getWidth()/2);

        return roundedBitmapDrawable;

    }

    public NetImageView(Context context) {

        super(context);

    }

    public NetImageView(Context context, AttributeSet attrs) {

        super(context, attrs);

    }

    /**

     * 设置本地文件的图片

     * @param url

     */

    public void setLocalImage(String url){

        FileInputStream fis =null;

        try {

            fis  = new FileInputStream(url);

            mBitmap = BitmapFactory.decodeStream(fis);

            mHandler.sendEmptyMessage(0x1324);

            //setImageBitmap(decodeStream);

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        }finally {

            if(fis!=null){

                try {

                    fis.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

    }

    /**

     * 设置资源文件

     * @param resId

     */

    public void setResourceImage(int resId){

       mBitmap = BitmapFactory.decodeResource(getResources(), resId);

        mHandler.sendEmptyMessage(0x133);

       // setImageBitmap(bitmap);

    }

    public void setUrlImage(final String url){

       new Thread(){

           @Override

           public void run() {

               try {

                   URL uri = new URL(url);

                   HttpURLConnection conn = (HttpURLConnection) uri.openConnection();

                  // conn.setConnectTimeout(100);

                  // conn.setDoInput(true);

                  // conn.setReadTimeout(100);

                   int responseCode = conn.getResponseCode();

                   if(responseCode==200){

                       InputStream is = conn.getInputStream();

                       mBitmap = BitmapFactory.decodeStream(is);

                       mHandler.sendEmptyMessage(0x343);

                       is.close();

                   }

               } catch (MalformedURLException e) {

                   e.printStackTrace();

               } catch (IOException e) {

                   e.printStackTrace();

               }finally {

               }

           }

       }.start();

    }

}