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Commit 00c575a3 authored by Ray Chen's avatar Ray Chen
Browse files

Add new thumbnail API.

parent 9d12fdb1

api/current.xml

+200 −0
Original line number Diff line number Diff line
@@ -114624,6 +114624,25 @@ 
<parameter name="volumeName" type="java.lang.String">

</parameter>

</method>

<method name="getThumbnail"

 return="android.graphics.Bitmap"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="cr" type="android.content.ContentResolver">

</parameter>

<parameter name="origId" type="long">

</parameter>

<parameter name="kind" type="int">

</parameter>

<parameter name="options" type="android.graphics.BitmapFactory.Options">

</parameter>

</method>

<method name="query"

 return="android.database.Cursor"

 abstract="false"
@@ -114787,6 +114806,17 @@ 
 visibility="public"

>

</field>

<field name="THUMB_DATA"

 type="java.lang.String"

 transient="false"

 volatile="false"

 value="&quot;thumb_data&quot;"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="WIDTH"

 type="java.lang.String"

 transient="false"
@@ -115005,6 +115035,176 @@ 
>

</field>

</class>

<class name="MediaStore.Video.Thumbnails"

 extends="java.lang.Object"

 abstract="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<implements name="android.provider.BaseColumns">

</implements>

<constructor name="MediaStore.Video.Thumbnails"

 type="android.provider.MediaStore.Video.Thumbnails"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</constructor>

<method name="getContentUri"

 return="android.net.Uri"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="volumeName" type="java.lang.String">

</parameter>

</method>

<method name="getThumbnail"

 return="android.graphics.Bitmap"

 abstract="false"

 native="false"

 synchronized="false"

 static="true"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="cr" type="android.content.ContentResolver">

</parameter>

<parameter name="origId" type="long">

</parameter>

<parameter name="kind" type="int">

</parameter>

<parameter name="options" type="android.graphics.BitmapFactory.Options">

</parameter>

</method>

<field name="DATA"

 type="java.lang.String"

 transient="false"

 volatile="false"

 value="&quot;_data&quot;"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="DEFAULT_SORT_ORDER"

 type="java.lang.String"

 transient="false"

 volatile="false"

 value="&quot;video_id ASC&quot;"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="EXTERNAL_CONTENT_URI"

 type="android.net.Uri"

 transient="false"

 volatile="false"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="FULL_SCREEN_KIND"

 type="int"

 transient="false"

 volatile="false"

 value="2"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="HEIGHT"

 type="java.lang.String"

 transient="false"

 volatile="false"

 value="&quot;height&quot;"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="INTERNAL_CONTENT_URI"

 type="android.net.Uri"

 transient="false"

 volatile="false"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="KIND"

 type="java.lang.String"

 transient="false"

 volatile="false"

 value="&quot;kind&quot;"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="MICRO_KIND"

 type="int"

 transient="false"

 volatile="false"

 value="3"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="MINI_KIND"

 type="int"

 transient="false"

 volatile="false"

 value="1"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="VIDEO_ID"

 type="java.lang.String"

 transient="false"

 volatile="false"

 value="&quot;video_id&quot;"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="WIDTH"

 type="java.lang.String"

 transient="false"

 volatile="false"

 value="&quot;width&quot;"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

</class>

<interface name="MediaStore.Video.VideoColumns"

 abstract="true"

 static="true"

core/java/android/provider/MediaStore.java

+259 −32
Original line number Diff line number Diff line
@@ -23,11 +23,15 @@ import android.content.ContentValues; 
import android.content.ContentUris;

import android.database.Cursor;

import android.database.DatabaseUtils;

import android.database.sqlite.SQLiteException;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Matrix;

import android.media.MiniThumbFile;

import android.media.ThumbnailUtil;

import android.net.Uri;

import android.os.Environment;

import android.os.ParcelFileDescriptor;

import android.util.Log;



import java.io.FileInputStream;
@@ -42,8 +46,7 @@ import java.text.Collator; 
 * The Media provider contains meta data for all available media on both internal

 * and external storage devices.

 */

public final class MediaStore

{

public final class MediaStore {

    private final static String TAG = "MediaStore";



    public static final String AUTHORITY = "media";
@@ -226,11 +229,129 @@ public final class MediaStore 
        public static final String MIME_TYPE = "mime_type";

     }



    /**

     * This class is used internally by Images.Thumbnails and Video.Thumbnails, it's not intended

     * to be accessed elsewhere.

     */

    private static class InternalThumbnails implements BaseColumns {

        private static final int MINI_KIND = 1;

        private static final int FULL_SCREEN_KIND = 2;

        private static final int MICRO_KIND = 3;

        private static final String[] PROJECTION = new String[] {_ID, MediaColumns.DATA};



        /**

         * This method ensure thumbnails associated with origId are generated and decode the byte

         * stream from database (MICRO_KIND) or file (MINI_KIND).

         *

         * Special optimization has been done to avoid further IPC communication for MICRO_KIND

         * thumbnails.

         *

         * @param cr ContentResolver

         * @param origId original image or video id

         * @param kind could be MINI_KIND or MICRO_KIND

         * @param options this is only used for MINI_KIND when decoding the Bitmap

         * @param baseUri the base URI of requested thumbnails

         * @return Bitmap bitmap of specified thumbnail kind

         */

        static Bitmap getThumbnail(ContentResolver cr, long origId, int kind,

                BitmapFactory.Options options, Uri baseUri, boolean isVideo) {

            Bitmap bitmap = null;

            String filePath = null;

            // some optimization for MICRO_KIND: if the magic is non-zero, we don't bother

            // querying MediaProvider and simply return thumbnail.

            if (kind == MICRO_KIND) {

                MiniThumbFile thumbFile = MiniThumbFile.instance(baseUri);

                if (thumbFile.getMagic(origId) != 0) {

                    byte[] data = new byte[MiniThumbFile.BYTES_PER_MINTHUMB];

                    if (thumbFile.getMiniThumbFromFile(origId, data) != null) {

                        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);

                        if (bitmap == null) {

                            Log.w(TAG, "couldn't decode byte array.");

                        }

                    }

                    return bitmap;

                }

            }



            Cursor c = null;

            try {

                Uri blockingUri = baseUri.buildUpon().appendQueryParameter("blocking", "1")

                        .appendQueryParameter("orig_id", String.valueOf(origId)).build();

                c = cr.query(blockingUri, PROJECTION, null, null, null);

                // This happens when original image/video doesn't exist.

                if (c == null) return null;



                // Assuming thumbnail has been generated, at least original image exists.

                if (kind == MICRO_KIND) {

                    MiniThumbFile thumbFile = MiniThumbFile.instance(baseUri);

                    byte[] data = new byte[MiniThumbFile.BYTES_PER_MINTHUMB];

                    if (thumbFile.getMiniThumbFromFile(origId, data) != null) {

                        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);

                        if (bitmap == null) {

                            Log.w(TAG, "couldn't decode byte array.");

                        }

                    }

                } else if (kind == MINI_KIND) {

                    if (c.moveToFirst()) {

                        ParcelFileDescriptor pfdInput;

                        Uri thumbUri = null;

                        try {

                            long thumbId = c.getLong(0);

                            filePath = c.getString(1);

                            thumbUri = ContentUris.withAppendedId(baseUri, thumbId);

                            pfdInput = cr.openFileDescriptor(thumbUri, "r");

                            bitmap = BitmapFactory.decodeFileDescriptor(

                                    pfdInput.getFileDescriptor(), null, options);

                            pfdInput.close();

                        } catch (FileNotFoundException ex) {

                            Log.e(TAG, "couldn't open thumbnail " + thumbUri + "; " + ex);

                        } catch (IOException ex) {

                            Log.e(TAG, "couldn't open thumbnail " + thumbUri + "; " + ex);

                        } catch (OutOfMemoryError ex) {

                            Log.e(TAG, "failed to allocate memory for thumbnail "

                                    + thumbUri + "; " + ex);

                        }

                    }

                } else {

                    throw new IllegalArgumentException("Unsupported kind: " + kind);

                }



                // We probably run out of space, so create the thumbnail in memory.

                if (bitmap == null) {

                    Log.v(TAG, "We probably run out of space, so create the thumbnail in memory.");

                    int targetSize = kind == MINI_KIND ? ThumbnailUtil.THUMBNAIL_TARGET_SIZE :

                            ThumbnailUtil.MINI_THUMB_TARGET_SIZE;

                    int maxPixelNum = kind == MINI_KIND ? ThumbnailUtil.THUMBNAIL_MAX_NUM_PIXELS :

                            ThumbnailUtil.MINI_THUMB_MAX_NUM_PIXELS;

                    Uri uri = Uri.parse(

                            baseUri.buildUpon().appendPath(String.valueOf(origId))

                                    .toString().replaceFirst("thumbnails", "media"));

                    if (isVideo) {

                        c = cr.query(uri, PROJECTION, null, null, null);

                        if (c != null && c.moveToFirst()) {

                            bitmap = ThumbnailUtil.createVideoThumbnail(c.getString(1));

                            if (kind == MICRO_KIND) {

                                bitmap = ThumbnailUtil.extractMiniThumb(bitmap,

                                        targetSize, targetSize, ThumbnailUtil.RECYCLE_INPUT);

                            }

                        }

                    } else {

                        bitmap = ThumbnailUtil.makeBitmap(targetSize, maxPixelNum, uri, cr);

                    }

                }

            } catch (SQLiteException ex) {

                Log.w(TAG, ex);

            } finally {

                if (c != null) c.close();

            }

            return bitmap;

        }

    }



    /**

     * Contains meta data for all available images.

     */

    public static final class Images

    {

    public static final class Images {

        public interface ImageColumns extends MediaColumns {

            /**

             * The description of the image
@@ -298,21 +419,18 @@ public final class MediaStore 
        }



        public static final class Media implements ImageColumns {

            public static final Cursor query(ContentResolver cr, Uri uri, String[] projection)

            {

            public static final Cursor query(ContentResolver cr, Uri uri, String[] projection) {

                return cr.query(uri, projection, null, null, DEFAULT_SORT_ORDER);

            }



            public static final Cursor query(ContentResolver cr, Uri uri, String[] projection,

                                           String where, String orderBy)

            {

                    String where, String orderBy) {

                return cr.query(uri, projection, where,

                                             null, orderBy == null ? DEFAULT_SORT_ORDER : orderBy);

            }



            public static final Cursor query(ContentResolver cr, Uri uri, String[] projection,

                    String selection, String [] selectionArgs, String orderBy)

            {

                    String selection, String [] selectionArgs, String orderBy) {

                return cr.query(uri, projection, selection,

                        selectionArgs, orderBy == null ? DEFAULT_SORT_ORDER : orderBy);

            }
@@ -326,8 +444,7 @@ public final class MediaStore 
             * @throws IOException

             */

            public static final Bitmap getBitmap(ContentResolver cr, Uri url)

                    throws FileNotFoundException, IOException

            {

                    throws FileNotFoundException, IOException {

                InputStream input = cr.openInputStream(url);

                Bitmap bitmap = BitmapFactory.decodeStream(input);

                input.close();
@@ -344,9 +461,8 @@ public final class MediaStore 
             * @return The URL to the newly created image

             * @throws FileNotFoundException

             */

            public static final String insertImage(ContentResolver cr, String imagePath, String name,

                                                   String description) throws FileNotFoundException

            {

            public static final String insertImage(ContentResolver cr, String imagePath,

                    String name, String description) throws FileNotFoundException {

                // Check if file exists with a FileInputStream

                FileInputStream stream = new FileInputStream(imagePath);

                try {
@@ -415,8 +531,7 @@ public final class MediaStore 
             *              for any reason.

             */

            public static final String insertImage(ContentResolver cr, Bitmap source,

                                                   String title, String description)

            {

                                                   String title, String description) {

                ContentValues values = new ContentValues();

                values.put(Images.Media.TITLE, title);

                values.put(Images.Media.DESCRIPTION, description);
@@ -425,8 +540,7 @@ public final class MediaStore 
                Uri url = null;

                String stringUrl = null;    /* value to be returned */



                try

                {

                try {

                    url = cr.insert(EXTERNAL_CONTENT_URI, values);



                    if (source != null) {
@@ -498,25 +612,45 @@ public final class MediaStore 
            public static final String DEFAULT_SORT_ORDER = ImageColumns.BUCKET_DISPLAY_NAME;

        }



        public static class Thumbnails implements BaseColumns

        {

            public static final Cursor query(ContentResolver cr, Uri uri, String[] projection)

            {

        /**

         * This class allows developers to query and get two kinds of thumbnails:

         * MINI_KIND: 512 x 384 thumbnail

         * MICRO_KIND: 96 x 96 thumbnail

         */

        public static class Thumbnails implements BaseColumns {

            public static final Cursor query(ContentResolver cr, Uri uri, String[] projection) {

                return cr.query(uri, projection, null, null, DEFAULT_SORT_ORDER);

            }



            public static final Cursor queryMiniThumbnails(ContentResolver cr, Uri uri, int kind, String[] projection)

            {

            public static final Cursor queryMiniThumbnails(ContentResolver cr, Uri uri, int kind,

                    String[] projection) {

                return cr.query(uri, projection, "kind = " + kind, null, DEFAULT_SORT_ORDER);

            }



            public static final Cursor queryMiniThumbnail(ContentResolver cr, long origId, int kind, String[] projection)

            {

            public static final Cursor queryMiniThumbnail(ContentResolver cr, long origId, int kind,

                    String[] projection) {

                return cr.query(EXTERNAL_CONTENT_URI, projection,

                        IMAGE_ID + " = " + origId + " AND " + KIND + " = " +

                        kind, null, null);

            }



            /**

             * This method checks if the thumbnails of the specified image (origId) has been created.

             * It will be blocked until the thumbnails are generated.

             *

             * @param cr ContentResolver used to dispatch queries to MediaProvider.

             * @param origId Original image id associated with thumbnail of interest.

             * @param kind The type of thumbnail to fetch. Should be either MINI_KIND or MICRO_KIND.

             * @param options this is only used for MINI_KIND when decoding the Bitmap

             * @return A Bitmap instance. It could be null if the original image

             *         associated with origId doesn't exist or memory is not enough.

             */

            public static Bitmap getThumbnail(ContentResolver cr, long origId, int kind,

                    BitmapFactory.Options options) {

                return InternalThumbnails.getThumbnail(cr, origId, kind, options,

                        EXTERNAL_CONTENT_URI, false);

            }



            /**

             * Get the content:// style URI for the image media table on the

             * given volume.
@@ -568,6 +702,11 @@ public final class MediaStore 
            public static final int MINI_KIND = 1;

            public static final int FULL_SCREEN_KIND = 2;

            public static final int MICRO_KIND = 3;

            /**

             * The blob raw data of thumbnail

             * <P>Type: DATA STREAM</P>

             */

            public static final String THUMB_DATA = "thumb_data";



            /**

             * The width of the thumbnal
@@ -1259,8 +1398,7 @@ public final class MediaStore 
         */

        public static final String DEFAULT_SORT_ORDER = MediaColumns.DISPLAY_NAME;



        public static final Cursor query(ContentResolver cr, Uri uri, String[] projection)

        {

        public static final Cursor query(ContentResolver cr, Uri uri, String[] projection) {

            return cr.query(uri, projection, null, null, DEFAULT_SORT_ORDER);

        }
@@ -1405,6 +1543,95 @@ public final class MediaStore 
             */

            public static final String DEFAULT_SORT_ORDER = TITLE;

        }



        /**

         * This class allows developers to query and get two kinds of thumbnails:

         * MINI_KIND: 512 x 384 thumbnail

         * MICRO_KIND: 96 x 96 thumbnail

         *

         */

        public static class Thumbnails implements BaseColumns {

            /**

             * This method checks if the thumbnails of the specified image (origId) has been created.

             * It will be blocked until the thumbnails are generated.

             *

             * @param cr ContentResolver used to dispatch queries to MediaProvider.

             * @param origId Original image id associated with thumbnail of interest.

             * @param kind The type of thumbnail to fetch. Should be either MINI_KIND or MICRO_KIND

             * @param options this is only used for MINI_KIND when decoding the Bitmap

             * @return A Bitmap instance. It could be null if the original image associated with

             *         origId doesn't exist or memory is not enough.

             */

            public static Bitmap getThumbnail(ContentResolver cr, long origId, int kind,

                    BitmapFactory.Options options) {

                return InternalThumbnails.getThumbnail(cr, origId, kind, options,

                        EXTERNAL_CONTENT_URI, true);

            }



            /**

             * Get the content:// style URI for the image media table on the

             * given volume.

             *

             * @param volumeName the name of the volume to get the URI for

             * @return the URI to the image media table on the given volume

             */

            public static Uri getContentUri(String volumeName) {

                return Uri.parse(CONTENT_AUTHORITY_SLASH + volumeName +

                        "/video/thumbnails");

            }



            /**

             * The content:// style URI for the internal storage.

             */

            public static final Uri INTERNAL_CONTENT_URI =

                    getContentUri("internal");



            /**

             * The content:// style URI for the "primary" external storage

             * volume.

             */

            public static final Uri EXTERNAL_CONTENT_URI =

                    getContentUri("external");



            /**

             * The default sort order for this table

             */

            public static final String DEFAULT_SORT_ORDER = "video_id ASC";



            /**

             * The data stream for the thumbnail

             * <P>Type: DATA STREAM</P>

             */

            public static final String DATA = "_data";



            /**

             * The original image for the thumbnal

             * <P>Type: INTEGER (ID from Video table)</P>

             */

            public static final String VIDEO_ID = "video_id";



            /**

             * The kind of the thumbnail

             * <P>Type: INTEGER (One of the values below)</P>

             */

            public static final String KIND = "kind";



            public static final int MINI_KIND = 1;

            public static final int FULL_SCREEN_KIND = 2;

            public static final int MICRO_KIND = 3;



            /**

             * The width of the thumbnal

             * <P>Type: INTEGER (long)</P>

             */

            public static final String WIDTH = "width";



            /**

             * The height of the thumbnail

             * <P>Type: INTEGER (long)</P>

             */

            public static final String HEIGHT = "height";

        }

    }



    /**

media/java/android/media/MediaScanner.java

+2 −0
Original line number Diff line number Diff line
@@ -486,6 +486,8 @@ public class MediaScanner 
        }



        public void scanFile(String path, long lastModified, long fileSize) {

            // This is the callback funtion from native codes.

            // Log.v(TAG, "scanFile: "+path);

            doScanFile(path, null, lastModified, fileSize, false);

        }

media/java/android/media/MiniThumbFile.java

0 → 100644
+280 −0

File added.

Preview size limit exceeded, changes collapsed.

media/java/android/media/ThumbnailUtil.java

0 → 100644
+401 −0

File added.

Preview size limit exceeded, changes collapsed.