Android : BroadcastReceiver Sample

1. StandAlone Type

: 별도의 클래스에 Custom BroadcastReceiver Class생성

: Manifest파일에 Receiver등록 및 IntentFilter > Action 정의

+ Manifest : 

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.android.networkreceiver"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8"/>
    <application android:label="@string/app_name" android:icon="@drawable/icon">
        <receiver android:name="NetworkReceiver">
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
            </intent-filter>
        </receiver>
    </application></manifest>

+ Java Code : (Custom Receiver Class)

import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.util.Log;

public class NetworkReceiver extends BroadcastReceiver {
    private static final String LOGTAG = "NetworkReceiver";

    @Override
    public void onReceive(Context ctx, Intent intent) {
        Log.i(LOGTAG, "Action: " + intent.getAction());
        if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
            NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
            String typeName = info.getTypeName();
            String subtypeName = info.getSubtypeName();
            boolean available = info.isAvailable();
            Log.i(LOGTAG, "Network Type: " + typeName 
                        + ", subtype: " + subtypeName
                        + ", available: " + available);
        }
    }}

2. Inside Activity Type

: Activity내부에서 BroadcastReceiver와 IntentFilter 생성 및 등록

    private IntentFilter mNetworkStateChangedFilter;
    private BroadcastReceiver mNetworkStateIntentReceiver;
    private String mTypeName = "Unknown";
    private String mSubtypeName = "Unknown";
    private boolean mAvailable = false;

    private TextView statusField;

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

        mNetworkStateChangedFilter = new IntentFilter();
        mNetworkStateChangedFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);

        mNetworkStateIntentReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
                    NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
                    mTypeName = info.getTypeName();
                    mSubtypeName = info.getSubtypeName();
                    mAvailable = info.isAvailable();
                    Log.i(LOGTAG, "Network Type: " + mTypeName 
                                + ", subtype: " + mSubtypeName
                                + ", available: " + mAvailable);
                    updateScreen();
                }
            }
        };

        setContentView(R.layout.main);
    }

    private void updateScreen() {
        statusField = (TextView) findViewById(R.id.networkStatus);
        statusField.setText("Network Type: " + mTypeName + "\n"
                          + "Network subtype: " + mSubtypeName + "\n"
                          + "Available: " + mAvailable);
    }

    @Override
    protected void onResume() {
        Log.d(LOGTAG, "onResume");
        super.onResume();
        registerReceiver(mNetworkStateIntentReceiver, mNetworkStateChangedFilter);
        unregisterReceiver(mNetworkStateIntentReceiver);
        registerReceiver(mNetworkStateIntentReceiver, mNetworkStateChangedFilter);
    }

    @Override
    protected void onPause() {
        Log.d(LOGTAG, "onPause");
        super.onPause();
        unregisterReceiver(mNetworkStateIntentReceiver);
    }