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      1 /*
      2  * Copyright 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.basicnetworking;
     18 
     19 import android.content.Context;
     20 import android.net.ConnectivityManager;
     21 import android.net.NetworkInfo;
     22 import android.os.Bundle;
     23 import android.support.v4.app.FragmentActivity;
     24 import android.util.TypedValue;
     25 import android.view.Menu;
     26 import android.view.MenuItem;
     27 
     28 import com.example.android.common.logger.Log;
     29 import com.example.android.common.logger.LogFragment;
     30 import com.example.android.common.logger.LogWrapper;
     31 import com.example.android.common.logger.MessageOnlyLogFilter;
     32 
     33 /**
     34  * Sample application demonstrating how to test whether a device is connected,
     35  * and if so, whether the connection happens to be wifi or mobile (it could be
     36  * something else).
     37  *
     38  * This sample uses the logging framework to display log output in the log
     39  * fragment (LogFragment).
     40  */
     41 public class MainActivity extends FragmentActivity {
     42 
     43     public static final String TAG = "Basic Network Demo";
     44     // Whether there is a Wi-Fi connection.
     45     private static boolean wifiConnected = false;
     46     // Whether there is a mobile connection.
     47     private static boolean mobileConnected = false;
     48 
     49     // Reference to the fragment showing events, so we can clear it with a button
     50     // as necessary.
     51     private LogFragment mLogFragment;
     52 
     53     @Override
     54     protected void onCreate(Bundle savedInstanceState) {
     55         super.onCreate(savedInstanceState);
     56         setContentView(R.layout.sample_main);
     57 
     58         // Initialize text fragment that displays intro text.
     59         SimpleTextFragment introFragment = (SimpleTextFragment)
     60                     getSupportFragmentManager().findFragmentById(R.id.intro_fragment);
     61         introFragment.setText(R.string.intro_message);
     62         introFragment.getTextView().setTextSize(TypedValue.COMPLEX_UNIT_DIP, 16.0f);
     63 
     64         // Initialize the logging framework.
     65         initializeLogging();
     66     }
     67 
     68     @Override
     69     public boolean onCreateOptionsMenu(Menu menu) {
     70         getMenuInflater().inflate(R.menu.main, menu);
     71         return true;
     72     }
     73 
     74     @Override
     75     public boolean onOptionsItemSelected(MenuItem item) {
     76         switch (item.getItemId()) {
     77             // When the user clicks TEST, display the connection status.
     78             case R.id.test_action:
     79                 checkNetworkConnection();
     80                 return true;
     81             // Clear the log view fragment.
     82             case R.id.clear_action:
     83                 mLogFragment.getLogView().setText("");
     84                 return true;
     85         }
     86         return false;
     87     }
     88 
     89     /**
     90      * Check whether the device is connected, and if so, whether the connection
     91      * is wifi or mobile (it could be something else).
     92      */
     93     private void checkNetworkConnection() {
     94       // BEGIN_INCLUDE(connect)
     95       ConnectivityManager connMgr =
     96           (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
     97       NetworkInfo activeInfo = connMgr.getActiveNetworkInfo();
     98       if (activeInfo != null && activeInfo.isConnected()) {
     99           wifiConnected = activeInfo.getType() == ConnectivityManager.TYPE_WIFI;
    100           mobileConnected = activeInfo.getType() == ConnectivityManager.TYPE_MOBILE;
    101           if(wifiConnected) {
    102               Log.i(TAG, getString(R.string.wifi_connection));
    103           } else if (mobileConnected){
    104               Log.i(TAG, getString(R.string.mobile_connection));
    105           }
    106       } else {
    107           Log.i(TAG, getString(R.string.no_wifi_or_mobile));
    108       }
    109       // END_INCLUDE(connect)
    110     }
    111 
    112     /** Create a chain of targets that will receive log data */
    113     public void initializeLogging() {
    114 
    115         // Using Log, front-end to the logging chain, emulates
    116         // android.util.log method signatures.
    117 
    118         // Wraps Android's native log framework
    119         LogWrapper logWrapper = new LogWrapper();
    120         Log.setLogNode(logWrapper);
    121 
    122         // A filter that strips out everything except the message text.
    123         MessageOnlyLogFilter msgFilter = new MessageOnlyLogFilter();
    124         logWrapper.setNext(msgFilter);
    125 
    126         // On screen logging via a fragment with a TextView.
    127         mLogFragment =
    128                 (LogFragment) getSupportFragmentManager().findFragmentById(R.id.log_fragment);
    129         msgFilter.setNext(mLogFragment.getLogView());
    130     }
    131 }
    132