I am trying to update an existing Android 4+ app to supply a widget. I followed the tutorial on developer.android.com but was not able to get it running. The widget does not show up in the widget list and can thus not be installed/used on the home screen.
This is what I did to add the widget to the app:
1. Added the WidgetProvider and Settings Activity to the Manifest file:
<!-- Widget -->
<receiver
android:name=".Widget.WidgetProvider"
android:label="Example Widget"
android:icon="@drawable/some_drawable">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/appwidget_info" />
</receiver>
<activity
android:name=".Widget.WidgetSettingsActivity"
android:label="@string/Settings" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
</intent-filter>
</activity>
2. Added the WidgetProvider
package com.mycompany.myapp.Widget;
import android.appwidget.AppWidgetProvider;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.content.Intent;
public class WidgetProvider extends AppWidgetProvider{
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
for (int i = 0; i < appWidgetIds.length; ++i) {
// Do something
}
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
}
3. Added the res/xml/appwidget_info.xml
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android">
android:minWidth="50dp"
android:minHeight="50dp"
android:minResizeHeight="50dp"
android:minResizeWidth="50dp"
android:updatePeriodMillis="0"
android:initialLayout="@layout/widget__content"
android:configure="com.mycompany.myapp.Widget.WidgetSettingsActivity
android:resizeMode="horizontal|vertical"
android:widgetCategory="home_screen">
</appwidget-provider>
4. Added the Settings Activity
// From the developer.android.com Example
package com.mycompany.myapp.Widget;
import android.app.Activity;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import com.mycompany.myapp.R;
public class WidgetSettingsActivity extends Activity {
private int appWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set the result to CANCELED. This will cause the widget host to cancel
// out of the widget placement if they press the back button.
setResult(RESULT_CANCELED);
// Set the view layout resource to use.
setContentView(R.layout.widget__settings);
// Find the EditText
//mUsername = (EditText)findViewById(R.id.username);
//mPassword = (EditText)findViewById(R.id.password);
// Bind the action for the save button.
//findViewById(R.id.save_button).setOnClickListener(mOnClickListener);
// Find the widget id from the intent.
Intent intent = getIntent();
Bundle extras = intent.getExtras();
if (extras != null)
appWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
// If they gave us an intent without the widget id, just bail.
if (appWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID)
finish();
}
}
Und das Layout in /res/layout/
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.mycompany.myapp.Widget.WidgetSettingsActivity">
<TextView android:text="@string/Settings" android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
5. Added the Widget Layout in /res/layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginLeft="@dimen/margin_default"
android:layout_marginRight="@dimen/margin_default"
android:layout_marginTop="@dimen/margin_default"
android:layout_weight="20" >
<Button
android:id="@+id/TButton"
style="@style/BigButton"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:layout_marginRight="@dimen/margin_medium"
android:layout_weight="1"
android:text="@string/Test" />
<Button
android:id="@+id/IButton"
style="@style/BigButton"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:layout_marginLeft="@dimen/margin_medium"
android:layout_weight="1"
android:text="@string/New" />
</LinearLayout>
</LinearLayout>
The app compiles and runs without any error. But I cannot access/see/use the widget anywhere.
I found other questions regarding this topic but they all had different solutions (e.g. missing intent-filter, installed on SD card instead in internal memory, etc.) which are not the case here.
Any idea what I might be doing wrong?
