MTP: Add support for battery level device property (56c85244) · Commits · e / os / android_frameworks_base

media/java/android/mtp/MtpDatabase.java

+43 −0

Original line number	Diff line number	Diff line
		@@ -16,15 +16,19 @@

		package android.mtp;

		import android.content.BroadcastReceiver;
		import android.content.Context;
		import android.content.ContentValues;
		import android.content.IContentProvider;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.content.SharedPreferences;
		import android.database.Cursor;
		import android.database.sqlite.SQLiteDatabase;
		import android.media.MediaScanner;
		import android.net.Uri;
		import android.os.BatteryManager;
		import android.os.BatteryStats;
		import android.os.RemoteException;
		import android.provider.MediaStore;
		import android.provider.MediaStore.Audio;
		@@ -113,11 +117,35 @@ public class MtpDatabase {
		+ Files.FileColumns.PARENT + "=?";

		private final MediaScanner mMediaScanner;
		private MtpServer mServer;

		// read from native code
		private int mBatteryLevel;
		private int mBatteryScale;

		static {
		System.loadLibrary("media_jni");
		}

		private BroadcastReceiver mBatteryReceiver = new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
		String action = intent.getAction();
		if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
		mBatteryScale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 0);
		int newLevel = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
		if (newLevel != mBatteryLevel) {
		mBatteryLevel = newLevel;
		if (mServer != null) {
		// send device property changed event
		mServer.sendDevicePropertyChanged(
		MtpConstants.DEVICE_PROPERTY_BATTERY_LEVEL);
		}
		}
		}
		}
		};

		public MtpDatabase(Context context, String volumeName, String storagePath,
		String[] subDirectories) {
		native_setup();
		@@ -171,6 +199,18 @@ public class MtpDatabase {
		initDeviceProperties(context);
		}

		public void setServer(MtpServer server) {
		mServer = server;

		// register for battery notifications when we are connected
		if (server != null) {
		mContext.registerReceiver(mBatteryReceiver,
		new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
		} else {
		mContext.unregisterReceiver(mBatteryReceiver);
		}
		}

		@Override
		protected void finalize() throws Throwable {
		try {
		@@ -663,6 +703,7 @@ public class MtpDatabase {
		MtpConstants.DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER,
		MtpConstants.DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME,
		MtpConstants.DEVICE_PROPERTY_IMAGE_SIZE,
		MtpConstants.DEVICE_PROPERTY_BATTERY_LEVEL,
		};
		}

		@@ -819,6 +860,8 @@ public class MtpDatabase {
		outStringValue[imageSize.length()] = 0;
		return MtpConstants.RESPONSE_OK;

		// DEVICE_PROPERTY_BATTERY_LEVEL is implemented in the JNI code

		default:
		return MtpConstants.RESPONSE_DEVICE_PROP_NOT_SUPPORTED;
		}

media/java/android/mtp/MtpServer.java

+6 −0

Original line number	Diff line number	Diff line
		@@ -30,6 +30,7 @@ public class MtpServer implements Runnable {

		public MtpServer(MtpDatabase database, boolean usePtp) {
		native_setup(database, usePtp);
		database.setServer(this);
		}

		public void start() {
		@@ -51,6 +52,10 @@ public class MtpServer implements Runnable {
		native_send_object_removed(handle);
		}

		public void sendDevicePropertyChanged(int property) {
		native_send_device_property_changed(property);
		}

		public void addStorage(MtpStorage storage) {
		native_add_storage(storage);
		}
		@@ -64,6 +69,7 @@ public class MtpServer implements Runnable {
		private native final void native_cleanup();
		private native final void native_send_object_added(int handle);
		private native final void native_send_object_removed(int handle);
		private native final void native_send_device_property_changed(int property);
		private native final void native_add_storage(MtpStorage storage);
		private native final void native_remove_storage(int storageId);
		}

media/jni/android_mtp_MtpDatabase.cpp

+84 −58

Original line number	Diff line number	Diff line
		@@ -68,6 +68,8 @@ static jmethodID method_sessionStarted;
		static jmethodID method_sessionEnded;

		static jfieldID field_context;
		static jfieldID field_batteryLevel;
		static jfieldID field_batteryScale;

		// MtpPropertyList fields
		static jfieldID field_mCount;
		@@ -527,12 +529,18 @@ MtpResponseCode MyMtpDatabase::setObjectPropertyValue(MtpObjectHandle handle,

		MtpResponseCode MyMtpDatabase::getDevicePropertyValue(MtpDeviceProperty property,
		MtpDataPacket& packet) {
		JNIEnv* env = AndroidRuntime::getJNIEnv();

		if (property == MTP_DEVICE_PROPERTY_BATTERY_LEVEL) {
		// special case - implemented here instead of Java
		packet.putUInt8((uint8_t)env->GetIntField(mDatabase, field_batteryLevel));
		return MTP_RESPONSE_OK;
		} else {
		int type;

		if (!getDevicePropertyInfo(property, type))
		return MTP_RESPONSE_DEVICE_PROP_NOT_SUPPORTED;

		JNIEnv* env = AndroidRuntime::getJNIEnv();
		jint result = env->CallIntMethod(mDatabase, method_getDeviceProperty,
		(jint)property, mLongBuffer, mStringBuffer);
		if (result != MTP_RESPONSE_OK) {
		@@ -590,6 +598,7 @@ MtpResponseCode MyMtpDatabase::getDevicePropertyValue(MtpDeviceProperty property
		checkAndClearExceptionFromCallback(env, __FUNCTION__);
		return MTP_RESPONSE_OK;
		}
		}

		MtpResponseCode MyMtpDatabase::setDevicePropertyValue(MtpDeviceProperty property,
		MtpDataPacket& packet) {
		@@ -923,6 +932,7 @@ static const PropertyTableEntry kDevicePropertyTable[] = {
		{ MTP_DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER, MTP_TYPE_STR },
		{ MTP_DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME, MTP_TYPE_STR },
		{ MTP_DEVICE_PROPERTY_IMAGE_SIZE, MTP_TYPE_STR },
		{ MTP_DEVICE_PROPERTY_BATTERY_LEVEL, MTP_TYPE_UINT8 },
		};

		bool MyMtpDatabase::getObjectPropertyInfo(MtpObjectProperty property, int& type) {
		@@ -1046,7 +1056,7 @@ MtpProperty* MyMtpDatabase::getDevicePropertyDesc(MtpDeviceProperty property) {
		case MTP_DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME:
		writable = true;
		// fall through
		case MTP_DEVICE_PROPERTY_IMAGE_SIZE:
		case MTP_DEVICE_PROPERTY_IMAGE_SIZE: {
		result = new MtpProperty(property, MTP_TYPE_STR, writable);

		// get current value
		@@ -1064,6 +1074,12 @@ MtpProperty* MyMtpDatabase::getDevicePropertyDesc(MtpDeviceProperty property) {
		}
		break;
		}
		case MTP_DEVICE_PROPERTY_BATTERY_LEVEL:
		result = new MtpProperty(property, MTP_TYPE_UINT8);
		result->setFormRange(0, env->GetIntField(mDatabase, field_batteryScale), 1);
		result->mCurrentValue.u.u8 = (uint8_t)env->GetIntField(mDatabase, field_batteryLevel);
		break;
		}

		checkAndClearExceptionFromCallback(env, __FUNCTION__);
		return result;
		@@ -1234,6 +1250,16 @@ int register_android_mtp_MtpDatabase(JNIEnv *env)
		ALOGE("Can't find MtpDatabase.mNativeContext");
		return -1;
		}
		field_batteryLevel = env->GetFieldID(clazz, "mBatteryLevel", "I");
		if (field_batteryLevel == NULL) {
		ALOGE("Can't find MtpDatabase.mBatteryLevel");
		return -1;
		}
		field_batteryScale = env->GetFieldID(clazz, "mBatteryScale", "I");
		if (field_batteryScale == NULL) {
		ALOGE("Can't find MtpDatabase.mBatteryScale");
		return -1;
		}

		// now set up fields for MtpPropertyList class
		clazz = env->FindClass("android/mtp/MtpPropertyList");

media/jni/android_mtp_MtpServer.cpp

+14 −0

Original line number	Diff line number	Diff line
		@@ -117,6 +117,18 @@ android_mtp_MtpServer_send_object_removed(JNIEnv *env, jobject thiz, jint handle
		ALOGE("server is null in send_object_removed");
		}

		static void
		android_mtp_MtpServer_send_device_property_changed(JNIEnv *env, jobject thiz, jint property)
		{
		Mutex::Autolock autoLock(sMutex);

		MtpServer* server = getMtpServer(env, thiz);
		if (server)
		server->sendDevicePropertyChanged(property);
		else
		ALOGE("server is null in send_object_removed");
		}

		static void
		android_mtp_MtpServer_add_storage(JNIEnv *env, jobject thiz, jobject jstorage)
		{
		@@ -174,6 +186,8 @@ static JNINativeMethod gMethods[] = {
		{"native_cleanup", "()V", (void *)android_mtp_MtpServer_cleanup},
		{"native_send_object_added", "(I)V", (void *)android_mtp_MtpServer_send_object_added},
		{"native_send_object_removed", "(I)V", (void *)android_mtp_MtpServer_send_object_removed},
		{"native_send_device_property_changed", "(I)V",
		(void *)android_mtp_MtpServer_send_device_property_changed},
		{"native_add_storage", "(Landroid/mtp/MtpStorage;)V",
		(void *)android_mtp_MtpServer_add_storage},
		{"native_remove_storage", "(I)V", (void *)android_mtp_MtpServer_remove_storage},