Widget not appearing in widget list

Question

I've read several questions about this on stackoverflow, and none of the answers are solving my problem.

I'm trying to add a home screen widget to my app, and my widget does not appear in Android's widget list.

I've tried rebooting the device, reinstalling the application, changing parameters in the configuration file, ensuring app is not installed on SD card. Nothing is working.

Here is the code I currently have:

Inside AndroidManifest.xml's application tag:

<receiver
    android:name=".GulpWidgetProvider"
    android:icon="@mipmap/ic_launcher"
    android:label="Gulp">
    <intent-filter>
        <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
    </intent-filter>
    <meta-data
        android:name="android.appwidget.provider"
        android:resource="@xml/gulp_widget_info" />
</receiver>

Inside /res/xml/gulp_widget_info.xml:

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:initialLayout="@layout/layout_widget"
    android:minHeight="150dip"
    android:minWidth="400dip"
    android:updatePeriodMillis="86400000"
    android:widgetCategory="home_screen"
    android:resizeMode="none"
    android:minResizeHeight="150dip"/>

Inside /res/layout/layout_widget.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="150dip"
    android:background="@drawable/gradient"
    android:gravity="center_horizontal|top">

    <RelativeLayout
        android:layout_width="170dip"
        android:layout_height="150dip"
        android:gravity="center">


        <ProgressBar
            android:id="@+id/widget_consumption_progress_bar"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="150dip"
            android:layout_height="150dip"
            android:layout_centerInParent="true"
            android:indeterminate="false"
            android:max="100"
            android:progress="0"
            android:progressDrawable="@drawable/progressbar"
            android:secondaryProgress="100" />

        <ProgressBar
            android:id="@+id/widget_time_progress_bar"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="150dip"
            android:layout_height="150dip"
            android:layout_centerInParent="true"
            android:indeterminate="false"
            android:max="100"
            android:progress="0"
            android:progressDrawable="@drawable/progressbar2"
            android:secondaryProgress="100" />

        <TextView
            android:id="@+id/widget_water_consumed"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:fontFamily="sans-serif-light"
            android:gravity="center"
            android:maxLines="1"
            android:textColor="@color/white"
            android:textSize="30sp" />

        <TextView
            android:id="@+id/widget_unit"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/water_consumed"
            android:layout_centerInParent="true"
            android:fontFamily="sans-serif-light"
            android:gravity="center"
            android:maxLines="1"
            android:text="@string/milliliters_abbrev"
            android:textColor="@color/white"
            android:textSize="12sp" />

    </RelativeLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="horizontal"
        android:paddingLeft="10dip"
        android:paddingRight="10dip">


        <TextView
            android:id="@+id/widget_add"
            style="@style/GulpButton"
            android:layout_width="60dip"
            android:layout_height="60dip"
            android:background="@drawable/whitecirclebutton"
            android:gravity="center"
            android:text="@string/add_abbrev" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:orientation="vertical">

            <TextView
                android:id="@+id/widget_goal"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:textColor="@color/white"
                android:textSize="22sp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:text="@string/target"
                android:textColor="@color/white_semi_translucent"
                android:textSize="14sp" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:orientation="vertical">

            <TextView
                android:id="@+id/widget_remaining"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:textColor="@color/white"
                android:textSize="22sp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:text="@string/remaining"
                android:textColor="@color/white_semi_translucent"
                android:textSize="14sp" />
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

Inside /java/info/andrewdahm/gulp/GulpWidgetProvider.java:

public class GulpWidgetProvider extends AppWidgetProvider {

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        final int N = appWidgetIds.length;

        // Perform this loop procedure for each App Widget that belongs to this provider
        for (int i=0; i<N; i++) {
            int appWidgetId = appWidgetIds[i];

            // Create an Intent to launch ExampleActivity
            Intent intent = new Intent(context, Main.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);

            // Get the layout for the App Widget and attach an on-click listener
            // to the button
            RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.layout_widget);
            views.setOnClickPendingIntent(R.id.widget_add, pendingIntent);

            // Tell the AppWidgetManager to perform an update on the current app widget
            appWidgetManager.updateAppWidget(appWidgetId, views);
        }
    }
}

Any ideas why my widget isn't appearing on the list of widgets?

Answer 1

It is an issue about the values you set in gulp_widget_info.xml for android:minHeight and android:minWidth.

Try to set a smaller values and the widget should appear in the launcher's widget list:

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:initialLayout="@layout/layout_widget"
    android:minHeight="40dip"
    android:minWidth="40dip"
    android:updatePeriodMillis="86400000"
    android:widgetCategory="home_screen"
    android:resizeMode="none" />

I tested this settings in my phone with Google Now Launcher and it appears with size 1x1

The rule to calculate the size is 70 × n − 30 where n is the number of cells you want. You can find more information about how to determine the size of the widget here.

Answer 2

ACcording to this link the Activity must be declared in the AppWidgetProviderInfo XML file, with the android:configure attribute and you are missing this.