How to make Widget

ButtonWidget.java          class


import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.RemoteViews;
import android.widget.Toast;

public class ButtonWidget extends AppWidgetProvider {

public static String ACTION_WIDGET_CONFIGURE = "ConfigureWidget";
public static String ACTION_WIDGET_RECEIVER = "ActionReceiverWidget";

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
Toast.makeText(context, "onUpdate", Toast.LENGTH_SHORT).show();

RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);
Intent configIntent = new Intent(context, ClickOneActivity.class);
configIntent.setAction(ACTION_WIDGET_CONFIGURE);

Intent active = new Intent(context, ButtonWidget.class);
active.setAction(ACTION_WIDGET_RECEIVER);
active.putExtra("msg", "Message for Button 1");

//PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, 0, active, 0);
PendingIntent configPendingIntent = PendingIntent.getActivity(context, 0, configIntent, 0);

//remoteViews.setOnClickPendingIntent(R.id.button_one, actionPendingIntent);
remoteViews.setOnClickPendingIntent(R.id.button_two, configPendingIntent);
appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);
}

@Override
public void onReceive(Context context, Intent intent) {
   
// v1.5 fix that doesn't call onDelete Action
final String action = intent.getAction();
if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)) {
final int appWidgetId = intent.getExtras().getInt(
AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
this.onDeleted(context, new int[] { appWidgetId });
}
} else {
// check, if our Action was called
if (intent.getAction().equals(ACTION_WIDGET_RECEIVER)) {
String msg = "null";
try {
msg = intent.getStringExtra("msg");
} catch (NullPointerException e) {
Log.e("Error", "msg = null");
}
Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();

PendingIntent contentIntent = PendingIntent.getActivity(context, 0, intent, 0);
NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification noty = new Notification(R.drawable.icon, "Button 1 clicked", System.currentTimeMillis());

noty.setLatestEventInfo(context, "Notice", msg, contentIntent);
notificationManager.notify(1, noty);

} else {
// do nothing
}

super.onReceive(context, intent);
}
}
}



ClickOneActivity.java         Our activity(main Activity)



public class ClickOneActivity  extends Activity {

//flag to detect flash is on or off
private boolean isLighOn = false;

private Camera camera;

private Button button;
RelativeLayout Rv;
ImageView im;




@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main1);

}


main.xml(Layout)



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="150dip"
    android:layout_height="40dip"
    android:layout_gravity="center"
    android:orientation="horizontal" >





    <Button
        android:id="@+id/button_two"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_gravity="center_horizontal|center"
        android:background="@drawable/appicon" />


</LinearLayout>




main1.xml(Layout)



<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/relativeLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/background" >


    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:background="@drawable/bottom_glow_red" />


    <Button
        android:id="@+id/buttonFlashlight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/imageView1"
        android:layout_centerHorizontal="true"
        android:background="@drawable/button_off" />


</RelativeLayout>










manifest file



<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.karan.torch"
    android:versionCode="1"
    android:versionName="1.0" >


    <uses-permission android:name="android.permission.CAMERA" />
    <uses-feature android:name="android.hardware.camera" />
    
    <application android:icon="@drawable/appicon" android:label="@string/app_name">


<!-- Broadcast Receiver that will process AppWidget updates -->
        <receiver android:name="com.karan.torch.ButtonWidget" android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
                <!-- Broadcast Receiver that will also process our self created action -->
<action android:name="com.karan.torch.ButtonWidget.ACTION_WIDGET_RECEIVER"/>
            </intent-filter>
            <meta-data android:name="android.appwidget.provider" android:resource="@xml/button_widget_provider" />
        </receiver>


<!-- this activity will be called, when we fire our self created ACTION_WIDGET_CONFIGURE -->
<activity android:name="com.karan.torch.ClickOneActivity">
   
   
    <intent-filter>
                <action android:name="android.intent.action.MAIN" />


                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
<intent-filter>
<action android:name="com.karan.torch.ButtonWidget.ACTION_WIDGET_CONFIGURE"/>
</intent-filter>
</activity>


    </application>
    <uses-sdk android:minSdkVersion="3" />
    

</manifest>









button_widget_provider.xml (In res/xml/button_widget_provider.xml)



<?xml version="1.0" encoding="utf-8"?>
<!-- 
AppWidget default settings:
- setting width and hight
- setting update periode to 1 second
- setting the initialLayout to layout/widget_text.xml
-->


<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:minWidth="146dip"
    android:minHeight="72dip"
    android:updatePeriodMillis="0"
    android:initialLayout="@layout/main1"
    />