MobileDataButton.java

package com.android.settings.widget.buttons;

import android.content.Context;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.provider.Settings;

import com.android.settings.R;
import com.android.settings.widget.SettingsAppWidgetProvider;
import com.android.settings.widget.WidgetSettings;

public class MobileDataButton extends WidgetButton {

	public static final String MOBILE_DATA_CHANGED = "com.android.internal.telephony.MOBILE_DATA_CHANGED";

	static MobileDataButton ownButton=null;

	static boolean stateChangeRequest=false;

	public static boolean getDataRomingEnabled(Context context) {
		return Settings.Secure.getInt(context.getContentResolver(),
				Settings.Secure.DATA_ROAMING,0) > 0;		
	}

	/**
	 * Gets the state of data
	 * 
	 * @return true if enabled.
	 */
	private static boolean getDataState(Context context) {
		ConnectivityManager cm = (ConnectivityManager) context
		.getSystemService(Context.CONNECTIVITY_SERVICE);
		return cm.getMobileDataEnabled();
	}

	/**
	 * Toggles the state of data.
	 * 
	 */
	@Override
	public void toggleState(Context context) {
		boolean enabled = getDataState(context);

		SharedPreferences preferences = context.getSharedPreferences(WidgetSettings.WIDGET_PREF_MAIN,
				Context.MODE_PRIVATE);

		ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
		if (enabled) {
			cm.setMobileDataEnabled(false);
			if (preferences.getBoolean(WidgetSettings.AUTO_DISABLE_3G, false)) {
				NetworkModeButton.getInstance().toggleState(context,SettingsAppWidgetProvider.STATE_DISABLED);
			}
		} else {
			if (preferences.getBoolean(WidgetSettings.AUTO_ENABLE_3G, false) &&
					NetworkModeButton.getInstance().isDisabled(context)) {
				SettingsAppWidgetProvider.logD("MobileData: Will enable 3G first");
				NetworkModeButton.getInstance().toggleState(context,SettingsAppWidgetProvider.STATE_ENABLED);
				stateChangeRequest=true;
			} else {
				cm.setMobileDataEnabled(true);
			}
		}
	}

	@Override
	public void updateState(Context context,
			SharedPreferences globalPreferences, int[] appWidgetIds) {
		
		if (stateChangeRequest) {
			currentIcon=R.drawable.ic_appwidget_settings_data_on;
			if (globalPreferences.getBoolean(WidgetSettings.MONITOR_DATA_ROAMING, true) && getDataRomingEnabled(context)) {
				currentState=SettingsAppWidgetProvider.STATE_DISABLED_RED;
			} else {
				currentState=SettingsAppWidgetProvider.STATE_INTERMEDIATE;
			}
			
		} else	if (getDataState(context)) {
			currentIcon=R.drawable.ic_appwidget_settings_data_on;
			if (globalPreferences.getBoolean(WidgetSettings.MONITOR_DATA_ROAMING, true) && getDataRomingEnabled(context)) {
				currentState=SettingsAppWidgetProvider.STATE_ENABLED_RED;
			} else {
				currentState=SettingsAppWidgetProvider.STATE_ENABLED;					
			}				
		} else {
			currentIcon=R.drawable.ic_appwidget_settings_data_off;
			if (globalPreferences.getBoolean(WidgetSettings.MONITOR_DATA_ROAMING, true) && getDataRomingEnabled(context)) {
				currentState=SettingsAppWidgetProvider.STATE_DISABLED_RED;
			} else {
				currentState=SettingsAppWidgetProvider.STATE_DISABLED;					
			}
		}
	}

	public static MobileDataButton getInstance() {
		if (ownButton==null)
			ownButton = new MobileDataButton();

		return ownButton;
	}

	@Override
	void initButton() {
		buttonID=WidgetButton.BUTTON_DATA;
		preferenceName=WidgetSettings.TOGGLE_DATA;
	}

	public void networkModeChanged(Context context, int networkMode) {
		if (stateChangeRequest) {
			ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
			cm.setMobileDataEnabled(true);	
			stateChangeRequest=false;
		}
	}

}