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
onCreate(Bundle savedInstanceState)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
onCreateOptionsMenu(Menu menu)69     public boolean onCreateOptionsMenu(Menu menu) {
70         getMenuInflater().inflate(R.menu.main, menu);
71         return true;
72     }
73 
74     @Override
onOptionsItemSelected(MenuItem item)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      */
checkNetworkConnection()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 */
initializeLogging()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