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Android example source code file (DrmStore.java)

This example Android source code file (DrmStore.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, authority, columns, content, content_uri, contentvalues, data, drm, drmrawcontent, drmstore, fileinputstream, intent, io, ioexception, net, network, string, tag, title, uri

The DrmStore.java Android example source code

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.provider;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.drm.mobile1.DrmRawContent;
import android.drm.mobile1.DrmRights;
import android.drm.mobile1.DrmRightsManager;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.util.Log;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * The DRM provider contains forward locked DRM content.
 *
 * @hide
 */
public final class DrmStore
{
    private static final String TAG = "DrmStore";

    public static final String AUTHORITY = "drm";

    /**
     * This is in the Manifest class of the drm provider, but that isn't visible
     * in the framework.
     */
    private static final String ACCESS_DRM_PERMISSION = "android.permission.ACCESS_DRM";

    /**
     * Fields for DRM database
     */

    public interface Columns extends BaseColumns {
        /**
         * The data stream for the file
         * <P>Type: DATA STREAM

*/ public static final String DATA = "_data"; /** * The size of the file in bytes * <P>Type: INTEGER (long)

*/ public static final String SIZE = "_size"; /** * The title of the file content * <P>Type: TEXT

*/ public static final String TITLE = "title"; /** * The MIME type of the file * <P>Type: TEXT

*/ public static final String MIME_TYPE = "mime_type"; } public interface Images extends Columns { public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/images"); } public interface Audio extends Columns { public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/audio"); } /** * Utility function for inserting a file into the DRM content provider. * * @param cr The content resolver to use * @param file The file to insert * @param title The title for the content (or null) * @return uri to the DRM record or null */ public static final Intent addDrmFile(ContentResolver cr, File file, String title) { FileInputStream fis = null; Intent result = null; try { fis = new FileInputStream(file); if (title == null) { title = file.getName(); int lastDot = title.lastIndexOf('.'); if (lastDot > 0) { title = title.substring(0, lastDot); } } result = addDrmFile(cr, fis, title); } catch (Exception e) { Log.e(TAG, "pushing file failed", e); } finally { try { if (fis != null) fis.close(); } catch (IOException e) { Log.e(TAG, "IOException in DrmStore.addDrmFile()", e); } } return result; } /** * Utility function for inserting a file stream into the DRM content provider. * * @param cr The content resolver to use * @param fileStream The FileInputStream to insert * @param title The title for the content (or null) * @return uri to the DRM record or null */ public static final Intent addDrmFile(ContentResolver cr, FileInputStream fis, String title) { OutputStream os = null; Intent result = null; try { DrmRawContent content = new DrmRawContent(fis, (int) fis.available(), DrmRawContent.DRM_MIMETYPE_MESSAGE_STRING); String mimeType = content.getContentType(); DrmRightsManager manager = manager = DrmRightsManager.getInstance(); DrmRights rights = manager.queryRights(content); InputStream stream = content.getContentInputStream(rights); long size = stream.available(); Uri contentUri = null; if (mimeType.startsWith("audio/")) { contentUri = DrmStore.Audio.CONTENT_URI; } else if (mimeType.startsWith("image/")) { contentUri = DrmStore.Images.CONTENT_URI; } else { Log.w(TAG, "unsupported mime type " + mimeType); } if (contentUri != null) { ContentValues values = new ContentValues(3); values.put(DrmStore.Columns.TITLE, title); values.put(DrmStore.Columns.SIZE, size); values.put(DrmStore.Columns.MIME_TYPE, mimeType); Uri uri = cr.insert(contentUri, values); if (uri != null) { os = cr.openOutputStream(uri); byte[] buffer = new byte[1000]; int count; while ((count = stream.read(buffer)) != -1) { os.write(buffer, 0, count); } result = new Intent(); result.setDataAndType(uri, mimeType); } } } catch (Exception e) { Log.e(TAG, "pushing file failed", e); } finally { try { if (fis != null) fis.close(); if (os != null) os.close(); } catch (IOException e) { Log.e(TAG, "IOException in DrmStore.addDrmFile()", e); } } return result; } /** * Utility function to enforce any permissions required to access DRM * content. * * @param context A context used for checking calling permission. */ public static void enforceAccessDrmPermission(Context context) { if (context.checkCallingOrSelfPermission(ACCESS_DRM_PERMISSION) != PackageManager.PERMISSION_GRANTED) { throw new SecurityException("Requires DRM permission"); } } }

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