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/*
* Copyright (C) 2012 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.nfc.handover;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.util.Log;
import android.webkit.MimeTypeMap;
import android.widget.Toast;
import com.android.nfc.handover.HandoverManager.HandoverPowerManager;
import com.android.nfc.R;
import java.util.ArrayList;
import java.util.Arrays;
public class BluetoothOppHandover implements Handler.Callback {
static final String TAG = "BluetoothOppHandover";
static final boolean D = true;
static final int STATE_INIT = 0;
static final int STATE_TURNING_ON = 1;
static final int STATE_WAITING = 2; // Need to wait for remote side turning on BT
static final int STATE_COMPLETE = 3;
static final int MSG_START_SEND = 0;
static final int REMOTE_BT_ENABLE_DELAY_MS = 5000;
static final String ACTION_HANDOVER_SEND =
"android.btopp.intent.action.HANDOVER_SEND";
static final String ACTION_HANDOVER_SEND_MULTIPLE =
"android.btopp.intent.action.HANDOVER_SEND_MULTIPLE";
final Context mContext;
final BluetoothDevice mDevice;
final Uri[] mUris;
final HandoverPowerManager mHandoverPowerManager;
final boolean mRemoteActivating;
final Handler mHandler;
int mState;
Long mStartTime;
public BluetoothOppHandover(Context context, BluetoothDevice device, Uri[] uris,
HandoverPowerManager powerManager, boolean remoteActivating) {
mContext = context;
mDevice = device;
mUris = uris;
mHandoverPowerManager = powerManager;
mRemoteActivating = remoteActivating;
mHandler = new Handler(context.getMainLooper(),this);
mState = STATE_INIT;
}
public static String getMimeTypeForUri(Context context, Uri uri) {
if (uri.getScheme() == null) return null;
if (uri.getScheme().equals(ContentResolver.SCHEME_CONTENT)) {
ContentResolver cr = context.getContentResolver();
return cr.getType(uri);
} else if (uri.getScheme().equals(ContentResolver.SCHEME_FILE)) {
String extension = MimeTypeMap.getFileExtensionFromUrl(uri.getPath()).toLowerCase();
if (extension != null) {
return MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
} else {
return null;
}
} else {
Log.d(TAG, "Could not determine mime type for Uri " + uri);
return null;
}
}
/**
* Main entry point. This method is usually called after construction,
* to begin the BT sequence. Must be called on Main thread.
*/
public void start() {
mStartTime = SystemClock.elapsedRealtime();
IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
mContext.registerReceiver(mReceiver, filter);
if (!mHandoverPowerManager.isBluetoothEnabled()) {
if (mHandoverPowerManager.enableBluetooth()) {
mState = STATE_TURNING_ON;
} else {
Toast.makeText(mContext, mContext.getString(R.string.beam_failed),
Toast.LENGTH_SHORT).show();
complete();
}
} else {
// BT already enabled
if (mRemoteActivating) {
mHandler.sendEmptyMessageDelayed(MSG_START_SEND, REMOTE_BT_ENABLE_DELAY_MS);
} else {
// Remote BT enabled too, start send immediately
sendIntent();
}
}
}
void complete() {
mState = STATE_COMPLETE;
mContext.unregisterReceiver(mReceiver);
}
void sendIntent() {
Intent intent = new Intent();
intent.setPackage("com.android.bluetooth");
String mimeType = getMimeTypeForUri(mContext, mUris[0]);
intent.setType(mimeType);
intent.putExtra(BluetoothDevice.EXTRA_DEVICE, mDevice);
if (mUris.length == 1) {
intent.setAction(ACTION_HANDOVER_SEND);
intent.putExtra(Intent.EXTRA_STREAM, mUris[0]);
} else {
ArrayList<Uri> uris = new ArrayList<Uri>(Arrays.asList(mUris));
intent.setAction(ACTION_HANDOVER_SEND_MULTIPLE);
intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
}
mContext.sendBroadcast(intent);
complete();
}
void handleIntent(Intent intent) {
String action = intent.getAction();
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action) && mState == STATE_TURNING_ON) {
int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
if (state == BluetoothAdapter.STATE_ON) {
// Add additional delay if needed
Long timeElapsed = SystemClock.elapsedRealtime() - mStartTime;
if (mRemoteActivating && timeElapsed < REMOTE_BT_ENABLE_DELAY_MS) {
mHandler.sendEmptyMessageDelayed(MSG_START_SEND,
REMOTE_BT_ENABLE_DELAY_MS - timeElapsed);
} else {
sendIntent();
}
} else if (state == BluetoothAdapter.STATE_OFF) {
complete();
}
return;
}
}
final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
handleIntent(intent);
}
};
@Override
public boolean handleMessage(Message msg) {
if (msg.what == MSG_START_SEND) {
sendIntent();
return true;
}
return false;
}
}
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