to top
BasicNetworking / src / com.example.android.basicnetworking /

MainActivity.java

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() {
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
      }
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
}