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Android example source code file (ConnectivityManagerTestActivity.java)

This example Android source code file (ConnectivityManagerTestActivity.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, connectivitymanagertestactivity, connectivityreceiver, content, intent, internet, linearlayout, list, net, network, networkinfo, networkstate, num_network_types, object, override, state, string, wifi, wificonfiguration, wifireceiver

The ConnectivityManagerTestActivity.java Android example source code

/*
 * Copyright (C) 2010, 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.connectivitymanagertest;

import android.app.Activity;
import android.content.Context;
import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import java.util.List;
import android.widget.LinearLayout;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.State;

import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.net.wifi.WifiInfo;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration.KeyMgmt;


/**
 * An activity registered with connectivity manager broadcast
 * provides network connectivity information and
 * can be used to set device states: Cellular, Wifi, Airplane mode.
 */
public class ConnectivityManagerTestActivity extends Activity {

    public static final String LOG_TAG = "ConnectivityManagerTestActivity";
    public static final int WAIT_FOR_SCAN_RESULT = 5 * 1000; //5 seconds
    public static final int WIFI_SCAN_TIMEOUT = 20 * 1000;
    public ConnectivityReceiver mConnectivityReceiver = null;
    public WifiReceiver mWifiReceiver = null;
    /*
     * Track network connectivity information
     */
    public State mState;
    public NetworkInfo mNetworkInfo;
    public NetworkInfo mOtherNetworkInfo;
    public boolean mIsFailOver;
    public String mReason;
    public boolean mScanResultIsAvailable = false;
    public ConnectivityManager mCM;
    public Object wifiObject = new Object();
    public Object connectivityObject = new Object();
    public int mWifiState;
    public NetworkInfo mWifiNetworkInfo;
    public String mBssid;

    /*
     * Control Wifi States
     */
    public WifiManager mWifiManager;

    /*
     * Verify connectivity state
     */
    public static final int NUM_NETWORK_TYPES = ConnectivityManager.MAX_NETWORK_TYPE + 1;
    NetworkState[] connectivityState = new NetworkState[NUM_NETWORK_TYPES];

    /**
     * A wrapper of a broadcast receiver which provides network connectivity information
     * for all kinds of network: wifi, mobile, etc.
     */
    private class ConnectivityReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            Log.v(LOG_TAG, "ConnectivityReceiver: onReceive() is called with " + intent);
            String action = intent.getAction();
            if (!action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
                Log.v("ConnectivityReceiver", "onReceive() called with " + intent);
                return;
            }

            boolean noConnectivity =
                intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);

            if (noConnectivity) {
                mState = State.DISCONNECTED;
            } else {
                mState = State.CONNECTED;
            }

            mNetworkInfo = (NetworkInfo)
                intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);

            mOtherNetworkInfo = (NetworkInfo)
                intent.getParcelableExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO);

            mReason = intent.getStringExtra(ConnectivityManager.EXTRA_REASON);
            mIsFailOver = intent.getBooleanExtra(ConnectivityManager.EXTRA_IS_FAILOVER, false);

            Log.v(LOG_TAG, "mNetworkInfo: " + mNetworkInfo.toString());
            if (mOtherNetworkInfo != null) {
                Log.v(LOG_TAG, "mOtherNetworkInfo: " + mOtherNetworkInfo.toString());
            }
            recordNetworkState(mNetworkInfo.getType(), mNetworkInfo.getState());
            if (mOtherNetworkInfo != null) {
                recordNetworkState(mOtherNetworkInfo.getType(), mOtherNetworkInfo.getState());
            }
            notifyNetworkConnectivityChange();
        }
    }

    private class WifiReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            Log.v("WifiReceiver", "onReceive() is calleld with " + intent);
            if (action.equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {
                notifyScanResult();
            } else if (action.equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)) {
                mWifiNetworkInfo =
                    (NetworkInfo) intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
                Log.v(LOG_TAG, "mWifiNetworkInfo: " + mWifiNetworkInfo.toString());
                if (mWifiNetworkInfo.getState() == State.CONNECTED) {
                    mBssid = intent.getStringExtra(WifiManager.EXTRA_BSSID);
                }
                notifyWifiState();
            } else if (action.equals(WifiManager.WIFI_STATE_CHANGED_ACTION)) {
                mWifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE,
                                                WifiManager.WIFI_STATE_UNKNOWN);
                notifyWifiState();
            }
            else {
                return;
            }
        }
    }

    public ConnectivityManagerTestActivity() {
        mState = State.UNKNOWN;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.v(LOG_TAG, "onCreate, inst=" + Integer.toHexString(hashCode()));

        // Create a simple layout
        LinearLayout contentView = new LinearLayout(this);
        contentView.setOrientation(LinearLayout.VERTICAL);
        setContentView(contentView);
        setTitle("ConnectivityManagerTestActivity");


        // register a connectivity receiver for CONNECTIVITY_ACTION;
        mConnectivityReceiver = new ConnectivityReceiver();
        registerReceiver(mConnectivityReceiver,
                new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));

        mWifiReceiver = new WifiReceiver();
        IntentFilter mIntentFilter = new IntentFilter();
        mIntentFilter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
        mIntentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
        mIntentFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
        registerReceiver(mWifiReceiver, mIntentFilter);

        // Get an instance of ConnectivityManager
        mCM = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
        // Get an instance of WifiManager
        mWifiManager =(WifiManager)getSystemService(Context.WIFI_SERVICE);
        initializeNetworkStates();

        if (mWifiManager.isWifiEnabled()) {
            Log.v(LOG_TAG, "Clear Wifi before we start the test.");
            clearWifi();
        }
     }

    // for each network type, initialize network states to UNKNOWN, and no verification flag is set
    public void initializeNetworkStates() {
        for (int networkType = NUM_NETWORK_TYPES - 1; networkType >=0; networkType--) {
            connectivityState[networkType] =  new NetworkState();
            Log.v(LOG_TAG, "Initialize network state for " + networkType + ": " +
                    connectivityState[networkType].toString());
        }
    }

    // deposit a network state
    public void recordNetworkState(int networkType, State networkState) {
        Log.v(LOG_TAG, "record network state for network " +  networkType +
                ", state is " + networkState);
        connectivityState[networkType].recordState(networkState);
    }

    // set the state transition criteria
    public void setStateTransitionCriteria(int networkType, State initState,
            int transitionDir, State targetState) {
        connectivityState[networkType].setStateTransitionCriteria(
                initState, transitionDir, targetState);
    }

    // Validate the states recorded
    public boolean validateNetworkStates(int networkType) {
        Log.v(LOG_TAG, "validate network state for " + networkType + ": ");
        return connectivityState[networkType].validateStateTransition();
    }

    // return result from network state validation
    public String getTransitionFailureReason(int networkType) {
        Log.v(LOG_TAG, "get network state transition failure reason for " + networkType + ": " +
                connectivityState[networkType].toString());
        return connectivityState[networkType].getReason();
    }

    private void notifyNetworkConnectivityChange() {
        synchronized(connectivityObject) {
            Log.v(LOG_TAG, "notify network connectivity changed");
            connectivityObject.notifyAll();
        }
    }
    private void notifyScanResult() {
        synchronized (this) {
            Log.v(LOG_TAG, "notify that scan results are available");
            this.notify();
        }
    }

    public void notifyWifiState() {
        synchronized (wifiObject) {
            Log.v(LOG_TAG, "notify wifi state changed");
            wifiObject.notify();
        }
    }

    // Return true if device is currently connected to mobile network
    public boolean isConnectedToMobile() {
        return (mNetworkInfo.getType() == ConnectivityManager.TYPE_MOBILE);
    }

    // Return true if device is currently connected to Wifi
    public boolean isConnectedToWifi() {
        return (mNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI);
    }

    public boolean enableWifi() {
        return mWifiManager.setWifiEnabled(true);
    }

    /**
     * Associate the device to given SSID
     * If the device is already associated with a WiFi, disconnect and forget it,
     * We don't verify whether the connection is successful or not, leave this to the test
     */
    public boolean connectToWifi(String knownSSID) {
        //If Wifi is not enabled, enable it
        if (!mWifiManager.isWifiEnabled()) {
            Log.v(LOG_TAG, "Wifi is not enabled, enable it");
            mWifiManager.setWifiEnabled(true);
        }

        List<ScanResult> netList = mWifiManager.getScanResults();
        if (netList == null) {
            // if no scan results are available, start active scan
            mWifiManager.startScanActive();
            mScanResultIsAvailable = false;
            long startTime = System.currentTimeMillis();
            while (!mScanResultIsAvailable) {
                if ((System.currentTimeMillis() - startTime) > WIFI_SCAN_TIMEOUT) {
                    return false;
                }
                // wait for the scan results to be available
                synchronized (this) {
                    // wait for the scan result to be available
                    try {
                        this.wait(WAIT_FOR_SCAN_RESULT);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    if ((mWifiManager.getScanResults() == null) ||
                            (mWifiManager.getScanResults().size() <= 0)) {
                        continue;
                    }
                    mScanResultIsAvailable = true;
                }
            }
        }

        netList = mWifiManager.getScanResults();
        for (int i = 0; i < netList.size(); i++) {
            ScanResult sr= netList.get(i);
            if (sr.SSID.equals(knownSSID)) {
                Log.v(LOG_TAG, "found " + knownSSID + " in the scan result list");
                WifiConfiguration config = new WifiConfiguration();
                config.SSID = convertToQuotedString(sr.SSID);
                config.allowedKeyManagement.set(KeyMgmt.NONE);
                int networkId = mWifiManager.addNetwork(config);
                // Connect to network by disabling others.
                mWifiManager.enableNetwork(networkId, true);
                mWifiManager.saveConfiguration();
                mWifiManager.reconnect();
                break;
           }
        }

        List<WifiConfiguration> netConfList = mWifiManager.getConfiguredNetworks();
        if (netConfList.size() <= 0) {
            Log.v(LOG_TAG, knownSSID + " is not available");
            return false;
        }
        return true;
    }

    /*
     * Disconnect from the current AP
     */
    public boolean disconnectAP() {
        if (mWifiManager.isWifiEnabled()) {
            //remove the current network Id
            WifiInfo curWifi = mWifiManager.getConnectionInfo();
            if (curWifi == null) {
                return false;
            }
            int curNetworkId = curWifi.getNetworkId();
            mWifiManager.removeNetwork(curNetworkId);
            mWifiManager.saveConfiguration();

            // remove other saved networks
            List<WifiConfiguration> netConfList = mWifiManager.getConfiguredNetworks();
            if (netConfList != null) {
                Log.v(LOG_TAG, "remove configured network ids");
                for (int i = 0; i < netConfList.size(); i++) {
                    WifiConfiguration conf = new WifiConfiguration();
                    conf = netConfList.get(i);
                    mWifiManager.removeNetwork(conf.networkId);
                }
            }
        }
        mWifiManager.saveConfiguration();
        return true;
    }
    /**
     * Disable Wifi
     * @return true if Wifi is disabled successfully
     */
    public boolean disableWifi() {
        return mWifiManager.setWifiEnabled(false);
    }

    /**
     * Disconnect from the current Wifi and clear the configuration list
     */
    public boolean clearWifi() {
            if (!disconnectAP()) {
                return false;
            }
            // Disable Wifi
            if (!mWifiManager.setWifiEnabled(false)) {
                return false;
            }
            // Wait for the actions to be completed
            try {
                Thread.sleep(5*1000);
            } catch (InterruptedException e) {}
        return true;
    }

    /**
     * Set airplane mode
     */
    public void setAirplaneMode(Context context, boolean enableAM) {
        //set the airplane mode
        Settings.System.putInt(context.getContentResolver(), Settings.System.AIRPLANE_MODE_ON,
                enableAM ? 1 : 0);
        // Post the intent
        Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
        intent.putExtra("state", enableAM);
        context.sendBroadcast(intent);
    }

    protected static String convertToQuotedString(String string) {
        return "\"" + string + "\"";
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        //Unregister receiver
        if (mConnectivityReceiver != null) {
            unregisterReceiver(mConnectivityReceiver);
        }
        if (mWifiReceiver != null) {
            unregisterReceiver(mWifiReceiver);
        }
        Log.v(LOG_TAG, "onDestroy, inst=" + Integer.toHexString(hashCode()));
    }
}

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