Fix failure from setDataSource(String path) when path is a local file

o the failure was because the mediaserver does not have read permission to sdcard
o related-to-bug: 6325960,6322913

Change-Id: I4feec01b8165c78563eee8aab69cb24df3244d03

Author: James Dong

media/java/android/media/MediaPlayer.java

@@ -34,7 +34,9 @@
 import android.graphics.SurfaceTexture;
 import android.media.AudioManager;
 
+import java.io.File;
 import java.io.FileDescriptor;
+import java.io.FileInputStream;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.util.Map;
@@ -847,8 +849,10 @@ public void setDataSource(Context context, Uri uri, Map<String, String> headers)
      * As an alternative, the application could first open the file for reading,
      * and then use the file descriptor form {@link #setDataSource(FileDescriptor)}.
      */
-    public native void setDataSource(String path)
-            throws IOException, IllegalArgumentException, SecurityException, IllegalStateException;
+    public void setDataSource(String path)
+            throws IOException, IllegalArgumentException, SecurityException, IllegalStateException {
+        setDataSource(path, null, null);
+    }
 
     /**
      * Sets the data source (file-path or http/rtsp URL) to use.
@@ -875,7 +879,20 @@ public void setDataSource(String path, Map<String, String> headers)
                 ++i;
             }
         }
-        _setDataSource(path, keys, values);
+        setDataSource(path, keys, values);
+    }
+
+    private void setDataSource(String path, String[] keys, String[] values)
+            throws IOException, IllegalArgumentException, SecurityException, IllegalStateException {
+        File file = new File(path);
+        if (file.exists()) {
+            FileInputStream is = new FileInputStream(file);
+            FileDescriptor fd = is.getFD();
+            setDataSource(fd);
+            is.close();
+        } else {
+            _setDataSource(path, keys, values);
+        }
     }
 
     private native void _setDataSource(

media/jni/android_media_MediaPlayer.cpp

@@ -215,12 +215,6 @@ android_media_MediaPlayer_setDataSourceAndHeaders(
             "setDataSource failed." );
 }
 
-static void
-android_media_MediaPlayer_setDataSource(JNIEnv *env, jobject thiz, jstring path)
-{
-    android_media_MediaPlayer_setDataSourceAndHeaders(env, thiz, path, NULL, NULL);
-}
-
 static void
 android_media_MediaPlayer_setDataSourceFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length)
 {
@@ -825,8 +819,6 @@ android_media_MediaPlayer_setNextMediaPlayer(JNIEnv *env, jobject thiz, jobject
 // ----------------------------------------------------------------------------
 
 static JNINativeMethod gMethods[] = {
-    {"setDataSource",       "(Ljava/lang/String;)V",            (void *)android_media_MediaPlayer_setDataSource},
-
     {
         "_setDataSource",
         "(Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)V",