Initial Contribution

Android.mk

+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := user development
+
+LOCAL_SRC_FILES := $(call all-subdir-java-files)
+
+LOCAL_JAVA_LIBRARIES := 
+
+LOCAL_PACKAGE_NAME := MediaProvider
+LOCAL_CERTIFICATE := media
+
+include $(BUILD_PACKAGE)

AndroidManifest.xml

+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+        package="com.android.providers.media"
+        android:sharedUserId="android.media">
+        
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.WRITE_SETTINGS" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    
+    <application android:process="android.process.media"
+                 android:label="Media Storage">
+        <provider android:name="MediaProvider" android:authorities="media"
+                android:multiprocess="false" />
+        
+        <receiver android:name="MediaScannerReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.MEDIA_MOUNTED" />
+                <data android:scheme="file" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.MEDIA_SCANNER_SCAN_FILE" />
+                <data android:scheme="file" />
+            </intent-filter>
+        </receiver>
+
+        <service android:name="MediaScannerService" android:exported="true">
+            <intent-filter>
+                <action android:name="android.media.IMediaScannerService" />
+            </intent-filter>
+        </service>
+
+    </application>
+</manifest>

NOTICE

+
+   Copyright (c) 2005-2008, 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.
+
+   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.
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
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+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
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+
+      "Work" shall mean the work of authorship, whether in Source or
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+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
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+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+

src/com/android/providers/media/MediaScannerCursor.java

+/*
+ * 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 com.android.providers.media;
+
+import android.database.AbstractCursor;
+import android.database.CursorWindow;
+import android.provider.MediaStore;
+
+
+/**
+ * Cursor for querying media scanner status.
+ */
+class MediaScannerCursor extends AbstractCursor {
+
+    private static final String[] kColumnNames = {
+        MediaStore.MEDIA_SCANNER_VOLUME
+    };
+
+    private String mVolumeName;
+
+    MediaScannerCursor(String volumeName) {
+        mVolumeName = volumeName;
+    }
+
+    @Override
+    public int getCount() {
+        return 1;
+    }
+
+    @Override
+    public String[] getColumnNames() {
+        return kColumnNames;
+    }
+
+    @Override
+    public String getString(int column) {
+        if (column == 0) {
+            return mVolumeName;
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public short getShort(int column) {
+        return -1;
+    }
+
+    @Override
+    public int getInt(int column) {
+        return -1;
+    }
+
+    @Override
+    public long getLong(int column) {
+        return -1;
+    }
+
+    @Override
+    public float getFloat(int column) {
+        return -1;
+    }
+    
+    @Override
+    public double getDouble(int column) {
+        return -1;
+    }
+
+    @Override
+    public boolean isNull(int column) {
+        return (column != 0);
+    }
+
+}

src/com/android/providers/media/MediaScannerReceiver.java

+/* //device/content/providers/media/src/com/android/providers/media/MediaScannerReceiver.java
+**
+** Copyright 2007, 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 com.android.providers.media;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.BroadcastReceiver;
+import android.net.Uri;
+import android.os.Environment;
+import android.os.Bundle;
+
+import java.io.File;
+
+
+public class MediaScannerReceiver extends BroadcastReceiver
+{
+    private final static String TAG = "MediaScannerReceiver";
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        String action = intent.getAction();
+        Uri uri = intent.getData();
+        String externalStoragePath = Environment.getExternalStorageDirectory().getPath();
+
+        if (action.equals(Intent.ACTION_BOOT_COMPLETED)) {
+            // scan internal storage
+            scan(context, MediaProvider.INTERNAL_VOLUME);
+            
+            // scan external storage if it is mounted
+            String state = Environment.getExternalStorageState();
+            if (Environment.MEDIA_MOUNTED.equals(state) || 
+                    Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
+               scan(context, MediaProvider.EXTERNAL_VOLUME);
+            }
+        } else {
+            if (uri.getScheme().equals("file")) {
+                // handle intents related to external storage
+                String path = uri.getPath();
+                if (action.equals(Intent.ACTION_MEDIA_MOUNTED) && 
+                        externalStoragePath.equals(path)) {
+                    scan(context, MediaProvider.EXTERNAL_VOLUME);
+                } else if (action.equals(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE) &&
+                        path != null && path.startsWith(externalStoragePath + "/")) {
+                    scanFile(context, path);
+                }
+            }
+        }
+    }
+
+    private void scan(Context context, String volume) {
+        Bundle args = new Bundle();
+        args.putString("volume", volume);
+        context.startService(
+                new Intent(context, MediaScannerService.class).putExtras(args));
+    }    
+
+    private void scanFile(Context context, String path) {
+        Bundle args = new Bundle();
+        args.putString("filepath", path);
+        context.startService(
+                new Intent(context, MediaScannerService.class).putExtras(args));
+    }    
+}
+
+

src/com/android/providers/media/MediaScannerService.java

+/* //device/content/providers/media/src/com/android/providers/media/MediaScannerService.java
+**
+** Copyright 2007, 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 com.android.providers.media;
+
+import android.app.Service;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.Intent;
+import android.media.IMediaScannerListener;
+import android.media.IMediaScannerService;
+import android.media.MediaScanner;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Environment;
+import android.os.FileUtils;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.Message;
+import android.os.PowerManager;
+import android.os.Process;
+import android.os.SystemProperties;
+import android.util.Config;
+import android.util.Log;
+
+import java.io.File;
+
+public class MediaScannerService extends Service implements Runnable
+{
+    private static final String TAG = "MediaScannerService";
+
+    private volatile Looper mServiceLooper;
+    private volatile ServiceHandler mServiceHandler;
+    private PowerManager.WakeLock mWakeLock;
+    
+    private void openDatabase(String volumeName) {
+        try {
+            ContentValues values = new ContentValues();
+            values.put("name", volumeName);
+            getContentResolver().insert(Uri.parse("content://media/"), values);
+        } catch (IllegalArgumentException ex) {
+            Log.w(TAG, "failed to open media database");
+        }         
+    }
+
+    private void closeDatabase(String volumeName) {
+        try {
+            getContentResolver().delete(
+                    Uri.parse("content://media/" + volumeName), null, null);
+        } catch (Exception e) {
+            Log.w(TAG, "failed to close media database " + volumeName + " exception: " + e);
+        }
+    }
+
+
+    private void scan(String[] directories, String volumeName) {
+        // don't sleep while scanning
+        mWakeLock.acquire();
+
+        MediaProvider mediaProvider = MediaProvider.getInstance();
+        if (mediaProvider != null) {
+            mediaProvider.setMediaScannerVolume(volumeName);
+        }
+
+        Uri uri = Uri.parse("file://" + directories[0]);
+        sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_STARTED, uri));
+        
+        try {
+            if (volumeName.equals(MediaProvider.EXTERNAL_VOLUME)) {
+                 openDatabase(volumeName);    
+            }
+
+            MediaScanner scanner = new MediaScanner(this);
+            scanner.scanDirectories(directories, volumeName);
+        } catch (Exception e) {
+        	Log.e(TAG, "exception in MediaScanner.scan()", e); 
+        }
+
+        if (mediaProvider != null) {
+            mediaProvider.setMediaScannerVolume(null);
+        }
+        sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_FINISHED, uri));
+        mWakeLock.release();
+    }
+    
+    @Override
+    public void onCreate()
+    {
+        PowerManager pm = (PowerManager)getSystemService(Context.POWER_SERVICE);
+        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
+
+        // Start up the thread running the service.  Note that we create a
+        // separate thread because the service normally runs in the process's
+        // main thread, which we don't want to block.
+        Thread thr = new Thread(null, this, "MediaScannerService");
+        thr.start();
+    }
+
+    @Override
+    public void onStart(Intent intent, int startId)
+    {
+        while (mServiceHandler == null) {
+            synchronized (this) {
+                try {
+                    wait(100);
+                } catch (InterruptedException e) {
+                }
+            }
+        }
+
+        Message msg = mServiceHandler.obtainMessage();
+        msg.arg1 = startId;
+        msg.obj = intent.getExtras();
+        mServiceHandler.sendMessage(msg);
+    }
+
+    @Override
+    public void onDestroy()
+    {
+        // Make sure thread has started before telling it to quit.
+        while (mServiceLooper == null) {
+            synchronized (this) {
+                try {
+                    wait(100);
+                } catch (InterruptedException e) {
+                }
+            }
+        }
+        mServiceLooper.quit();
+    }
+
+    public void run()
+    {
+        Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
+        Looper.prepare();
+
+        mServiceLooper = Looper.myLooper();
+        mServiceHandler = new ServiceHandler();
+
+        Looper.loop();
+    }
+   
+    private Uri scanFile(String path, String mimeType) {
+        String volumeName = MediaProvider.INTERNAL_VOLUME;
+        String externalStoragePath = Environment.getExternalStorageDirectory().getPath();
+
+        if (path.startsWith(externalStoragePath)) {
+            volumeName = MediaProvider.EXTERNAL_VOLUME;
+            openDatabase(volumeName);
+        }
+        MediaScanner scanner = new MediaScanner(this);
+        return scanner.scanSingleFile(path, volumeName, mimeType);
+    }
+
+    @Override
+    public IBinder onBind(Intent intent)
+    {
+        return mBinder;
+    }
+    
+    private final IMediaScannerService.Stub mBinder = 
+            new IMediaScannerService.Stub() {
+        public void requestScanFile(String path, String mimeType, IMediaScannerListener listener)
+        {
+            if (Config.LOGD) {
+                Log.d(TAG, "IMediaScannerService.scanFile: " + path + " mimeType: " + mimeType);
+            }
+            Bundle args = new Bundle();
+            args.putString("filepath", path);
+            args.putString("mimetype", mimeType);
+            if (listener != null) {
+                args.putIBinder("listener", listener.asBinder());
+            }
+            startService(new Intent(MediaScannerService.this,
+                    MediaScannerService.class).putExtras(args));
+        }
+
+        public void scanFile(String path, String mimeType) {
+            requestScanFile(path, mimeType, null);
+        }
+    };
+
+    private final class ServiceHandler extends Handler
+    {
+        @Override
+        public void handleMessage(Message msg)
+        {
+            Bundle arguments = (Bundle) msg.obj;
+            String filePath = arguments.getString("filepath");
+            
+            try {
+                if (filePath != null) {
+                    IBinder binder = arguments.getIBinder("listener");
+                    IMediaScannerListener listener = 
+                            (binder == null ? null : IMediaScannerListener.Stub.asInterface(binder));
+                    Uri uri = scanFile(filePath, arguments.getString("mimetype"));
+                    if (listener != null) {
+                        listener.scanCompleted(filePath, uri);
+                    }
+                } else {
+                    String volume = arguments.getString("volume");
+                    String[] directories = null;
+                    
+                    if (MediaProvider.INTERNAL_VOLUME.equals(volume)) {
+                        // scan internal media storage
+                        directories = new String[] {
+                                Environment.getRootDirectory() + "/media",
+                        };
+                    }
+                    else if (MediaProvider.EXTERNAL_VOLUME.equals(volume)) {
+                        // scan external storage
+                        directories = new String[] {
+                                Environment.getExternalStorageDirectory().getPath(),
+                                };
+                    }
+                    
+                    if (directories != null) {
+                        if (Config.LOGD) Log.d(TAG, "start scanning volume " + volume);
+                        scan(directories, volume);
+                        if (Config.LOGD) Log.d(TAG, "done scanning volume " + volume);
+                    }
+                }
+            } catch (Exception e) {
+                Log.e(TAG, "Exception in handleMessage", e);
+            }
+
+            stopSelf(msg.arg1);
+        }
+    };
+}
+