commit b4aa69fd116d5486f224914350a57b4befddfe26
author kyle_tso <kyle_tso@htc.com> Wed Nov 22 20:11:27 2017 +0800
committer kyle_tso <kyle_tso@htc.com> Wed Nov 22 20:30:42 2017 +0800
tree 9278a4cfa01605c61137732a86c3955e47fb0166
parent e887e2b9c15747b97d10446d7901852bd54fd669

Support scanDirectories with JNI callback function

MtpServer needs this function to update the database for directory
copy operation.

Test: Call this function from MtpServer and database is updated in
directory copy scenario.

Change-Id: I9b316f4dbf7f35922292c33ab02f9efebc867aa8
Signed-off-by: kyle_tso <kyle_tso@htc.com>

media/java/android/mtp/MtpDatabase.java

diff --git a/media/java/android/mtp/MtpDatabase.java b/media/java/android/mtp/MtpDatabase.java
index adcd79b..09a04bc 100755
--- a/media/java/android/mtp/MtpDatabase.java
+++ b/media/java/android/mtp/MtpDatabase.java
@@ -421,6 +421,12 @@
         }
     }
 
+    private void doScanDirectory(String path) {
+        String[] scanPath;
+        scanPath = new String[] { path };
+        mMediaScanner.scanDirectories(scanPath);
+    }
+
     private Cursor createObjectQuery(int storageID, int format, int parent) throws RemoteException {
         String where;
         String[] whereArgs;

media/jni/android_mtp_MtpDatabase.cpp

diff --git a/media/jni/android_mtp_MtpDatabase.cpp b/media/jni/android_mtp_MtpDatabase.cpp
index 0c946ba..08bf4e1 100644
--- a/media/jni/android_mtp_MtpDatabase.cpp
+++ b/media/jni/android_mtp_MtpDatabase.cpp
@@ -55,6 +55,7 @@
 
 static jmethodID method_beginSendObject;
 static jmethodID method_endSendObject;
+static jmethodID method_doScanDirectory;
 static jmethodID method_getObjectList;
 static jmethodID method_getNumObjects;
 static jmethodID method_getSupportedPlaybackFormats;
@@ -119,6 +120,8 @@
                                             MtpObjectFormat format,
                                             bool succeeded);
 
+    virtual void                    doScanDirectory(const char* path);
+
     virtual MtpObjectHandleList*    getObjectList(MtpStorageID storageID,
                                     MtpObjectFormat format,
                                     MtpObjectHandle parent);
@@ -265,6 +268,16 @@
     checkAndClearExceptionFromCallback(env, __FUNCTION__);
 }
 
+void MyMtpDatabase::doScanDirectory(const char* path) {
+    JNIEnv* env = AndroidRuntime::getJNIEnv();
+    jstring pathStr = env->NewStringUTF(path);
+    env->CallVoidMethod(mDatabase, method_doScanDirectory, pathStr);
+
+    if (pathStr)
+        env->DeleteLocalRef(pathStr);
+    checkAndClearExceptionFromCallback(env, __FUNCTION__);
+}
+
 MtpObjectHandleList* MyMtpDatabase::getObjectList(MtpStorageID storageID,
                                                   MtpObjectFormat format,
                                                   MtpObjectHandle parent) {
@@ -1308,6 +1321,11 @@
         ALOGE("Can't find endSendObject");
         return -1;
     }
+    method_doScanDirectory = env->GetMethodID(clazz, "doScanDirectory", "(Ljava/lang/String;)V");
+    if (method_doScanDirectory == NULL) {
+        ALOGE("Can't find doScanDirectory");
+        return -1;
+    }
     method_getObjectList = env->GetMethodID(clazz, "getObjectList", "(III)[I");
     if (method_getObjectList == NULL) {
         ALOGE("Can't find getObjectList");