android.csulb.edu.wifidirecttest.WiFiDirectActivity.java Source code

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/*
 * Copyright (C) 2011 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 android.csulb.edu.wifidirecttest;

import android.Manifest;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.p2p.WifiP2pConfig;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.ActionListener;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager.ChannelListener;
import android.os.Bundle;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

/**
 * An activity that uses WiFi Direct APIs to discover and connect with available
 * devices. WiFi Direct APIs are asynchronous and rely on callback mechanism
 * using interfaces to notify the application of operation success or failure.
 * The application should also register a BroadcastReceiver for notification of
 * WiFi state related events.
 */
public class WiFiDirectActivity extends Activity
        implements ChannelListener, DeviceListFragment.DeviceActionListener {

    public static final String TAG = "wifidirectdemo";
    private WifiP2pManager manager;
    private boolean isWifiP2pEnabled = false;
    private boolean retryChannel = false;

    private final IntentFilter intentFilter = new IntentFilter();
    private Channel channel;
    private BroadcastReceiver receiver = null;

    /**
     * @param isWifiP2pEnabled the isWifiP2pEnabled to set
     */
    public void setIsWifiP2pEnabled(boolean isWifiP2pEnabled) {
        this.isWifiP2pEnabled = isWifiP2pEnabled;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);
        int PERMISSION_ALL = 1;
        String[] PERMISSIONS = { Manifest.permission.ACCESS_WIFI_STATE, Manifest.permission.CHANGE_WIFI_STATE,
                Manifest.permission.CHANGE_NETWORK_STATE, Manifest.permission.INTERNET,
                Manifest.permission.READ_PHONE_STATE, Manifest.permission.WRITE_EXTERNAL_STORAGE,
                Manifest.permission.ACCESS_NETWORK_STATE };

        ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);

        // add necessary intent values to be matched.

        intentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
        intentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
        intentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
        intentFilter.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);

        manager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
        channel = manager.initialize(this, getMainLooper(), null);
    }

    /** register the BroadcastReceiver with the intent values to be matched */
    @Override
    public void onResume() {
        super.onResume();
        receiver = new WiFiDirectBroadcastReceiver(manager, channel, this);
        registerReceiver(receiver, intentFilter);
    }

    @Override
    public void onPause() {
        super.onPause();
        unregisterReceiver(receiver);
    }

    /**
     * Remove all peers and clear all fields. This is called on
     * BroadcastReceiver receiving a state change event.
     */
    public void resetData() {
        DeviceListFragment fragmentList = (DeviceListFragment) getFragmentManager()
                .findFragmentById(R.id.frag_list);
        DeviceDetailFragment fragmentDetails = (DeviceDetailFragment) getFragmentManager()
                .findFragmentById(R.id.frag_detail);
        if (fragmentList != null) {
            fragmentList.clearPeers();
        }
        if (fragmentDetails != null) {
            fragmentDetails.resetViews();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.action_items, menu);
        return true;
    }

    /*
     * (non-Javadoc)
     * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
     */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.atn_direct_enable:
            if (manager != null && channel != null) {

                // Since this is the system wireless settings activity, it's
                // not going to send us a result. We will be notified by
                // WiFiDeviceBroadcastReceiver instead.

                startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));
            } else {
                Log.e(TAG, "channel or manager is null");
            }
            return true;

        case R.id.atn_direct_discover:
            if (!isWifiP2pEnabled) {
                Toast.makeText(WiFiDirectActivity.this, R.string.p2p_off_warning, Toast.LENGTH_SHORT).show();
                return true;
            }
            final DeviceListFragment fragment = (DeviceListFragment) getFragmentManager()
                    .findFragmentById(R.id.frag_list);
            fragment.onInitiateDiscovery();
            manager.discoverPeers(channel, new ActionListener() {

                @Override
                public void onSuccess() {
                    Toast.makeText(WiFiDirectActivity.this, "Discovery Initiated", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onFailure(int reasonCode) {
                    Toast.makeText(WiFiDirectActivity.this, "Discovery Failed : " + reasonCode, Toast.LENGTH_SHORT)
                            .show();
                }
            });
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public void showDetails(WifiP2pDevice device) {
        DeviceDetailFragment fragment = (DeviceDetailFragment) getFragmentManager()
                .findFragmentById(R.id.frag_detail);
        fragment.showDetails(device);

    }

    @Override
    public void connect(WifiP2pConfig config) {
        manager.connect(channel, config, new ActionListener() {

            @Override
            public void onSuccess() {
                // WiFiDirectBroadcastReceiver will notify us. Ignore for now.
            }

            @Override
            public void onFailure(int reason) {
                Toast.makeText(WiFiDirectActivity.this, "Connect failed. Retry.", Toast.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    public void disconnect() {
        final DeviceDetailFragment fragment = (DeviceDetailFragment) getFragmentManager()
                .findFragmentById(R.id.frag_detail);
        fragment.resetViews();
        manager.removeGroup(channel, new ActionListener() {

            @Override
            public void onFailure(int reasonCode) {
                Log.d(TAG, "Disconnect failed. Reason :" + reasonCode);

            }

            @Override
            public void onSuccess() {
                fragment.getView().setVisibility(View.GONE);
            }

        });
    }

    @Override
    public void onChannelDisconnected() {
        // we will try once more
        if (manager != null && !retryChannel) {
            Toast.makeText(this, "Channel lost. Trying again", Toast.LENGTH_LONG).show();
            resetData();
            retryChannel = true;
            manager.initialize(this, getMainLooper(), this);
        } else {
            Toast.makeText(this, "Severe! Channel is probably lost premanently. Try Disable/Re-Enable P2P.",
                    Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void cancelDisconnect() {

        /*
         * A cancel abort request by user. Disconnect i.e. removeGroup if
         * already connected. Else, request WifiP2pManager to abort the ongoing
         * request
         */
        if (manager != null) {
            final DeviceListFragment fragment = (DeviceListFragment) getFragmentManager()
                    .findFragmentById(R.id.frag_list);
            if (fragment.getDevice() == null || fragment.getDevice().status == WifiP2pDevice.CONNECTED) {
                disconnect();
            } else if (fragment.getDevice().status == WifiP2pDevice.AVAILABLE
                    || fragment.getDevice().status == WifiP2pDevice.INVITED) {

                manager.cancelConnect(channel, new ActionListener() {

                    @Override
                    public void onSuccess() {
                        Toast.makeText(WiFiDirectActivity.this, "Aborting connection", Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onFailure(int reasonCode) {
                        Toast.makeText(WiFiDirectActivity.this,
                                "Connect abort request failed. Reason Code: " + reasonCode, Toast.LENGTH_SHORT)
                                .show();
                    }
                });
            }
        }

    }
}