7月25日： 

下面是从网上看到的，能解析音频文件的专辑信息的，比如专辑图片。

 

public class Test extends Activity {
    /** Called when the activity is first created. */
    private ListView list;
    private static final String sExternalMediaUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI.toString();
    private static final Uri sArtworkUri = Uri.parse("content://media/external/audio/albumart");
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Bitmap bm = null;
        long songid = -1,albumid = -1;
        Cursor cur = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null,null, null, null);
        if(cur.moveToNext()){
            songid = cur.getLong(0);
            albumid = cur.getLong(12);
        }
        if (albumid < 0 && songid < 0) {
            throw new IllegalArgumentException("Must specify an album or a song id");
        }

        try {
            if (albumid < 0) {
                Uri uri = Uri.parse("content://media/external/audio/media/" + songid + "/albumart");
                ParcelFileDescriptor pfd = getContentResolver().openFileDescriptor(uri, "r");
                if (pfd != null) {
                    FileDescriptor fd = pfd.getFileDescriptor();
                    bm = BitmapFactory.decodeFileDescriptor(fd);
                }
            } else {
                Uri uri = ContentUris.withAppendedId(sArtworkUri, albumid);
                ParcelFileDescriptor pfd = getContentResolver().openFileDescriptor(uri, "r");
                if (pfd != null) {
                    FileDescriptor fd = pfd.getFileDescriptor();
                    bm = BitmapFactory.decodeFileDescriptor(fd);
                }
            }
        } catch (FileNotFoundException ex) {
            //
        }
        BitmapDrawable bmpDraw = new BitmapDrawable(bm);
        ImageView image = (ImageView)findViewById(R.id.album);
        image.setImageDrawable(bmpDraw);
    }
   
}

获取图片：

private String getAlbumArt(int trackId) {//trackId是音乐的id
        String mUriTrack = "content://media/external/audio/media/#";
        String[] projection = new String[] {"album_id"};
        String selection = "_id = ?";
        String[] selectionArgs = new String[] {Integer.toString(trackId)};        
        Cursor cur = context.getContentResolver().query(Uri.parse(mUriTrack), projection, selection, selectionArgs, null);
        int album_id = 0;
        if (cur.getCount() > 0 && cur.getColumnCount() > 0) {
            cur.moveToNext();
            album_id = cur.getInt(0);
        }
        cur.close();
        cur = null;

        if (album_id < 0) {
            return null;
        }
        String mUriAlbums = "content://media/external/audio/albums";
        projection = new String[] {"album_art"};
        cur = context.getContentResolver().query(Uri.parse(mUriAlbums + "/" + Integer.toString(album_id)), projection, null, null, null);

        String album_art = null;
        if (cur.getCount() > 0 && cur.getColumnCount() > 0) {
            cur.moveToNext();
            album_art = cur.getString(0);
        }
        cur.close();
        cur = null;
            
        return album_art;
    }

7月31日 图片缩放

这是来自eoe的代码，我找来尝试解析时间：

是专门实现图片放大变小的代码，
package com.jinyan.TestImage;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.ImageView;

public class TestImage extends Activity {
        /** Called when the activity is first created. */

        private static final String tag = "TestImage.............";
        
        String imageUrl = "http://i.pbase.com/o6/92/229792/1/80199697.uAs58yHk.50pxCross_of_the_Knights_Templar_svg.png";
        Bitmap bmImg;
        ImageView imView;

        Button button1;
        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);
                imView = (ImageView) findViewById(R.id.imview);
                imView.setImageBitmap(returnBitMap(imageUrl));

                Bitmap bitmap = returnBitMap(imageUrl);

                imView.setImageDrawable(resizeImage(bitmap, 600, 600));
        }
        
        public Bitmap returnBitMap(String url) {
                URL myFileUrl = null;
                Bitmap bitmap = null;
                try {
                        myFileUrl = new URL(url);
                } catch (MalformedURLException e) {
                        e.printStackTrace();
                }
                try {
                        HttpURLConnection conn = (HttpURLConnection) myFileUrl
                                        .openConnection();
                        conn.setDoInput(true);
                        conn.connect();
                        InputStream is = conn.getInputStream();
                        bitmap = BitmapFactory.decodeStream(is);
                        is.close();
                } catch (IOException e) {
                        e.printStackTrace();
                }
                Log.v(tag,bitmap.toString());
                
                return bitmap;
        }

        public static Drawable resizeImage(Bitmap bitmap, int w, int h) {

                // load the origial Bitmap
                Bitmap BitmapOrg = bitmap;

                int width = BitmapOrg.getWidth();
                int height = BitmapOrg.getHeight();
                int newWidth = w;
                int newHeight = h;
                
                Log.v(tag,String.valueOf(width));
                Log.v(tag,String.valueOf(height));
                
                Log.v(tag,String.valueOf(newWidth));
                Log.v(tag,String.valueOf(newHeight));

                // calculate the scale
                float scaleWidth = ((float) newWidth) / width;
                float scaleHeight = ((float) newHeight) / height;

                // create a matrix for the manipulation
                Matrix matrix = new Matrix();
                // resize the Bitmap
                matrix.postScale(scaleWidth, scaleHeight);
                // if you want to rotate the Bitmap
                // matrix.postRotate(45);

                // recreate the new Bitmap
                Bitmap resizedBitmap = Bitmap.createBitmap(BitmapOrg, 0, 0, width,
                                height, matrix, true);

                // make a Drawable from Bitmap to allow to set the Bitmap
                // to the ImageView, ImageButton or what ever
                return new BitmapDrawable(resizedBitmap);

        }
        
}