start implementing new post widget

Signed-off-by: Christine Dodrill <me@christine.website>

app/build.gradle

@@ -17,6 +17,7 @@
 import groovy.xml.MarkupBuilder
 
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
 
 def twaManifest = [
     applicationId: 'website.christine.xesite',
@@ -153,6 +154,9 @@ android {
     lintOptions {
         checkReleaseBuilds false
     }
+    buildFeatures {
+        viewBinding true
+    }
 }
 
 task generateShorcutsFile {
@@ -202,5 +206,6 @@ dependencies {
         implementation 'com.google.androidbrowserhelper:locationdelegation:1.0.0'
     
         implementation 'com.google.androidbrowserhelper:androidbrowserhelper:2.2.0'
-    
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'com.android.volley:volley:1.2.0'
 }

app/src/main/AndroidManifest.xml

@@ -1,48 +1,39 @@
-<!--
-    Copyright 2019 Google Inc. All Rights Reserved.
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-         http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-
-<!-- The "package" attribute is rewritten by the Gradle build with the value of applicationId.
-     It is still required here, as it is used to derive paths, for instance when referring
-     to an Activity by ".MyActivity" instead of the full name. If more Activities are added to the
-     application, the package attribute will need to reflect the correct path in order to use
-     the abbreviated format. -->
+<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="website.christine.xesite">
 
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application
-        android:name="Application"
+        android:name=".Application"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/appName"
-
         android:manageSpaceActivity="com.google.androidbrowserhelper.trusted.ManageDataLauncherActivity"
-
         android:supportsRtl="true"
         android:theme="@android:style/Theme.Translucent.NoTitleBar">
+        <receiver android:name=".CurrentPostWidget">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/current_post_widget_info" />
+        </receiver>
+
+        <activity android:name=".CurrentPostWidgetConfigureActivity">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
+            </intent-filter>
+        </activity>
 
         <meta-data
             android:name="asset_statements"
             android:resource="@string/assetStatements" />
-
         <meta-data
             android:name="web_manifest_url"
             android:value="@string/webManifestUrl" />
-
         <meta-data
             android:name="twa_generator"
             android:value="@string/generatorApp" />
@@ -52,69 +43,56 @@
                 android:name="android.support.customtabs.trusted.MANAGE_SPACE_URL"
                 android:value="@string/launchUrl" />
         </activity>
-
         <activity
-            android:name="LauncherActivity"
+            android:name=".LauncherActivity"
             android:alwaysRetainTaskState="true"
             android:label="@string/launcherName"
             android:screenOrientation="unspecified">
             <meta-data
                 android:name="android.support.customtabs.trusted.DEFAULT_URL"
                 android:value="@string/launchUrl" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.STATUS_BAR_COLOR"
                 android:resource="@color/colorPrimary" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.NAVIGATION_BAR_COLOR"
                 android:resource="@color/navigationColor" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.NAVIGATION_BAR_COLOR_DARK"
                 android:resource="@color/navigationColorDark" />
-
             <meta-data
                 android:name="androix.browser.trusted.NAVIGATION_BAR_DIVIDER_COLOR"
                 android:resource="@color/navigationDividerColor" />
-
             <meta-data
                 android:name="androix.browser.trusted.NAVIGATION_BAR_DIVIDER_COLOR_DARK"
                 android:resource="@color/navigationDividerColorDark" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.SPLASH_IMAGE_DRAWABLE"
                 android:resource="@drawable/splash" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.SPLASH_SCREEN_BACKGROUND_COLOR"
                 android:resource="@color/backgroundColor" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.SPLASH_SCREEN_FADE_OUT_DURATION"
                 android:value="@integer/splashScreenFadeOutDuration" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.FILE_PROVIDER_AUTHORITY"
                 android:value="@string/providerAuthority" />
-
             <meta-data
                 android:name="android.app.shortcuts"
                 android:resource="@xml/shortcuts" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.FALLBACK_STRATEGY"
                 android:value="@string/fallbackType" />
-
             <meta-data
                 android:name="android.support.customtabs.trusted.SCREEN_ORIENTATION"
                 android:value="@string/orientation" />
 
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
-
             <intent-filter android:autoVerify="true">
                 <action android:name="android.intent.action.VIEW" />
 
@@ -126,9 +104,7 @@
                     android:scheme="https" />
             </intent-filter>
         </activity>
-
         <activity android:name="com.google.androidbrowserhelper.trusted.FocusActivity" />
-
         <activity
             android:name="com.google.androidbrowserhelper.trusted.WebViewFallbackActivity"
             android:configChanges="orientation|screenSize" />
@@ -147,14 +123,14 @@
             android:name=".DelegationService"
             android:enabled="@bool/enableNotification"
             android:exported="@bool/enableNotification">
-
             <intent-filter>
                 <action android:name="android.support.customtabs.trusted.TRUSTED_WEB_ACTIVITY_SERVICE" />
+
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </service>
 
         <activity android:name="com.google.androidbrowserhelper.locationdelegation.PermissionRequestActivity" />
-
     </application>
+
 </manifest>

app/src/main/java/website/christine/xesite/CurrentPostWidget.kt

@@ -0,0 +1,44 @@
+package website.christine.xesite
+
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.content.Context
+import android.widget.RemoteViews
+
+/**
+ * Implementation of App Widget functionality.
+ * App Widget Configuration implemented in [CurrentPostWidgetConfigureActivity]
+ */
+class CurrentPostWidget : AppWidgetProvider() {
+    override fun onUpdate(context: Context, appWidgetManager: AppWidgetManager, appWidgetIds: IntArray) {
+        // There may be multiple widgets active, so update all of them
+        for (appWidgetId in appWidgetIds) {
+            updateAppWidget(context, appWidgetManager, appWidgetId)
+        }
+    }
+
+    override fun onDeleted(context: Context, appWidgetIds: IntArray) {
+        // When the user deletes the widget, delete the preference associated with it.
+        for (appWidgetId in appWidgetIds) {
+            deleteTitlePref(context, appWidgetId)
+        }
+    }
+
+    override fun onEnabled(context: Context) {
+        // Enter relevant functionality for when the first widget is created
+    }
+
+    override fun onDisabled(context: Context) {
+        // Enter relevant functionality for when the last widget is disabled
+    }
+}
+
+internal fun updateAppWidget(context: Context, appWidgetManager: AppWidgetManager, appWidgetId: Int) {
+    val widgetText = loadTitlePref(context, appWidgetId)
+    // Construct the RemoteViews object
+    val views = RemoteViews(context.packageName, R.layout.current_post_widget)
+    views.setTextViewText(R.id.appwidget_text, widgetText)
+
+    // Instruct the widget manager to update the widget
+    appWidgetManager.updateAppWidget(appWidgetId, views)
+}

app/src/main/java/website/christine/xesite/CurrentPostWidgetConfigureActivity.kt

@@ -0,0 +1,103 @@
+package website.christine.xesite
+
+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 android.widget.EditText
+import website.christine.xesite.databinding.CurrentPostWidgetConfigureBinding
+
+/**
+ * The configuration screen for the [CurrentPostWidget] AppWidget.
+ */
+class CurrentPostWidgetConfigureActivity : Activity() {
+    private var appWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID
+    private lateinit var appWidgetText: EditText
+    private var onClickListener = View.OnClickListener {
+        val context = this@CurrentPostWidgetConfigureActivity
+
+        // When the button is clicked, store the string locally
+        val widgetText = appWidgetText.text.toString()
+        saveTitlePref(context, appWidgetId, widgetText)
+
+        // It is the responsibility of the configuration activity to update the app widget
+        val appWidgetManager = AppWidgetManager.getInstance(context)
+        updateAppWidget(context, appWidgetManager, appWidgetId)
+
+        // Make sure we pass back the original appWidgetId
+        val resultValue = Intent()
+        resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId)
+        setResult(RESULT_OK, resultValue)
+        finish()
+    }
+    private lateinit var binding: CurrentPostWidgetConfigureBinding
+
+    public override fun onCreate(icicle: Bundle?) {
+        super.onCreate(icicle)
+
+        // Set the result to CANCELED.  This will cause the widget host to cancel
+        // out of the widget placement if the user presses the back button.
+        setResult(RESULT_CANCELED)
+
+        binding = CurrentPostWidgetConfigureBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        appWidgetText = binding.appwidgetText as EditText
+        binding.addButton.setOnClickListener(onClickListener)
+
+        // Find the widget id from the intent.
+        val intent = intent
+        val extras = intent.extras
+        if (extras != null) {
+            appWidgetId = extras.getInt(
+                    AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID)
+        }
+
+        // If this activity was started with an intent without an app widget ID, finish with an error.
+        if (appWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) {
+            finish()
+            return
+        }
+
+        appWidgetText.setText(loadTitlePref(this@CurrentPostWidgetConfigureActivity, appWidgetId))
+    }
+
+}
+
+private const val PREFS_NAME = "website.christine.xesite.CurrentPostWidget"
+private const val PREF_PREFIX_KEY = "appwidget_"
+
+internal fun savePref(ctx: Context, key: String, value: String) {
+    val prefs = ctx.getSharedPreferences(PREFS_NAME, 0).edit()
+    prefs.putString(PREF_PREFIX_KEY + key, value)
+    prefs.apply()
+}
+
+internal fun loadPref(ctx: Context, key: String, default: String): String {
+    val prefs = ctx.getSharedPreferences(PREFS_NAME, 0)
+    val titleValue = prefs.getString(PREF_PREFIX_KEY + key, null)
+    return titleValue ?: default
+}
+
+// Write the prefix to the SharedPreferences object for this widget
+internal fun saveTitlePref(context: Context, appWidgetId: Int, text: String) {
+    val prefs = context.getSharedPreferences(PREFS_NAME, 0).edit()
+    prefs.putString(PREF_PREFIX_KEY + appWidgetId, text)
+    prefs.apply()
+}
+
+// Read the prefix from the SharedPreferences object for this widget.
+// If there is no preference saved, get the default from a resource
+internal fun loadTitlePref(context: Context, appWidgetId: Int): String {
+    val prefs = context.getSharedPreferences(PREFS_NAME, 0)
+    val titleValue = prefs.getString(PREF_PREFIX_KEY + appWidgetId, null)
+    return titleValue ?: context.getString(R.string.appwidget_text)
+}
+
+internal fun deleteTitlePref(context: Context, appWidgetId: Int) {
+    val prefs = context.getSharedPreferences(PREFS_NAME, 0).edit()
+    prefs.remove(PREF_PREFIX_KEY + appWidgetId)
+    prefs.apply()
+}

app/src/main/res/layout/current_post_widget.xml

@@ -0,0 +1,37 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="?attr/appWidgetBackgroundColor"
+    android:padding="@dimen/widget_margin"
+    android:theme="@style/ThemeOverlay.Xesite_android.AppWidgetContainer">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:id="@+id/imageView"
+            android:layout_width="92dp"
+            android:layout_height="wrap_content"
+            android:src="@drawable/splash" />
+
+        <TextView
+            android:id="@+id/appwidget_text"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:layout_marginTop="8dp"
+            android:layout_marginEnd="8dp"
+            android:layout_marginBottom="8dp"
+            android:background="?attr/appWidgetBackgroundColor"
+            android:contentDescription="@string/appwidget_text"
+            android:text="@string/appwidget_text"
+            android:textColor="?attr/appWidgetTextColor"
+            android:textSize="24sp"
+            android:textStyle="bold|italic" />
+
+    </LinearLayout>
+
+</RelativeLayout>

app/src/main/res/layout/current_post_widget_configure.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="16dp">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:text="@string/configure" />
+
+    <EditText
+        android:id="@+id/appwidget_text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:inputType="text" />
+
+    <Button
+        android:id="@+id/add_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:text="@string/add_widget" />
+
+    <ImageView
+        android:id="@+id/imageView2"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:src="@drawable/splash" />
+
+</LinearLayout>

app/src/main/res/values-night/themes.xml

@@ -0,0 +1,7 @@
+<resources>
+
+    <style name="ThemeOverlay.Xesite_android.AppWidgetContainer" parent="">
+        <item name="appWidgetBackgroundColor">@color/light_blue_900</item>
+        <item name="appWidgetTextColor">@color/light_blue_200</item>
+    </style>
+</resources>

app/src/main/res/values/attrs.xml

@@ -0,0 +1,6 @@
+<resources>
+    <declare-styleable name="AppWidgetAttrs">
+        <attr name="appWidgetBackgroundColor" format="color" />
+        <attr name="appWidgetTextColor" format="color" />
+    </declare-styleable>
+</resources>

app/src/main/res/values/colors.xml

@@ -15,4 +15,8 @@
 -->
 <resources>
     <color name="shortcut_background">#F5F5F5</color>
+    <color name="light_blue_50">#FFE1F5FE</color>
+    <color name="light_blue_200">#FF81D4FA</color>
+    <color name="light_blue_600">#FF039BE5</color>
+    <color name="light_blue_900">#FF01579B</color>
 </resources>

app/src/main/res/values/dimens.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <!--
+Refer to App Widget Documentation for margin information
+http://developer.android.com/guide/topics/appwidgets/index.html#CreatingLayout
+    -->
+    <dimen name="widget_margin">0dp</dimen>
+
+</resources>

app/src/main/res/values/strings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="appwidget_text">EXAMPLE</string>
+    <string name="configure">Configure</string>
+    <string name="add_widget">Add widget</string>
+    <string name="text_text">Test text to see if I can do this.</string>
+</resources>

app/src/main/res/values/themes.xml

@@ -0,0 +1,7 @@
+<resources>
+
+    <style name="ThemeOverlay.Xesite_android.AppWidgetContainer" parent="">
+        <item name="appWidgetBackgroundColor">@color/light_blue_600</item>
+        <item name="appWidgetTextColor">@color/light_blue_50</item>
+    </style>
+</resources>

app/src/main/res/xml/current_post_widget_info.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:configure="website.christine.xesite.CurrentPostWidgetConfigureActivity"
+    android:initialKeyguardLayout="@layout/current_post_widget"
+    android:initialLayout="@layout/current_post_widget"
+    android:minWidth="250dp"
+    android:minHeight="40dp"
+    android:previewImage="@drawable/example_appwidget_preview"
+    android:resizeMode="horizontal"
+    android:updatePeriodMillis="86400000"
+    android:widgetCategory="home_screen"></appwidget-provider>

build.gradle

@@ -18,12 +18,16 @@
 
 buildscript {
 
+    ext {
+        kotlin_version = '1.5.0'
+    }
     repositories {
         google()
         jcenter()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:4.2.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files