Merge pull request #14 from amardeshbd/feature/12_setup_barebone_layout_preview_screen

Feature/12 setup barebone layout preview screen

Author: hossain-khan

app/build.gradle

@@ -57,6 +57,7 @@ dependencies {
     // ========================================================
     // 3rd party libraries
     // ========================================================
+    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
     debugImplementation "com.squareup.leakcanary:leakcanary-android:$rootProject.leakcanaryLibraryVersion"
     releaseImplementation "com.squareup.leakcanary:leakcanary-android-no-op:$rootProject.leakcanaryLibraryVersion"
 
@@ -71,6 +72,9 @@ dependencies {
     //implementation "com.google.dagger:dagger-android-support:$rootProject.daggerVersion"
     kapt "com.google.dagger:dagger-android-processor:$rootProject.daggerVersion"
 
+    // A highly customizable, powerful and easy-to-use alerting library for Android.
+    // https://github.com/aritraroy/Flashbar
+    implementation "com.andrognito.flashbar:flashbar:$rootProject.flashBarVersion"
 
     // ----------------------------------------------------------------
     // Android Unit and Instrumentation test

app/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name=".layoutpositioning.LayoutPositioningDemoActivity"></activity>
     </application>
 
 </manifest>

app/src/main/java/com/hossainkhan/android/demo/MainActivity.kt

@@ -2,7 +2,9 @@ package com.hossainkhan.android.demo
 
 import android.support.v7.app.AppCompatActivity
 import android.os.Bundle
+import android.view.View
 import com.hossainkhan.android.demo.data.AppDataStore
+import com.hossainkhan.android.demo.layoutpositioning.LayoutPositioningDemoActivity
 import dagger.android.AndroidInjection
 import timber.log.Timber
 import javax.inject.Inject
@@ -19,4 +21,11 @@ class MainActivity : AppCompatActivity() {
         Timber.d("Got data: ${appDataStore.isFirstTime()}")
         appDataStore.updateFirstTimeUser(false)
     }
+
+    // FIXME - Test code
+    fun goSomewhere(view: View?) {
+        startActivity(LayoutPositioningDemoActivity
+                .createStartIntent(this, R.layout.activity_positioning_top_left))
+
+    }
 }

app/src/main/java/com/hossainkhan/android/demo/base/AppConfig.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2018 Hossain Khan
+ *
+ * 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.
+ */
+
+package com.hossainkhan.android.demo.base
+
+/**
+ * Application configurations.
+ */
+object AppConfig {
+    const val GITHUB_BASE_URL = "https://github.com/amardeshbd/android-constraint-layout-cheatsheet"
+}

app/src/main/java/com/hossainkhan/android/demo/dagger/ActivityBindingModule.kt

@@ -16,7 +16,9 @@
 
 package com.hossainkhan.android.demo.dagger
 
+import com.hossainkhan.android.demo.layoutpositioning.LayoutPositioningDemoActivity
 import dagger.Module
+import dagger.android.ContributesAndroidInjector
 
 /**
  * We want Dagger.Android to create a Subcomponent which has a parent Component of whichever 
@@ -31,7 +33,7 @@ import dagger.Module
  * When Dagger.Android annotation processor runs it will create subcomponents for us.
  */
 @Module
-public abstract class ActivityBindingModule {
+abstract class ActivityBindingModule {
     /*
      * https://google.github.io/dagger/android.html
      * Pro-tip: If your subcomponent and its builder have no other methods or supertypes than
@@ -42,8 +44,7 @@ public abstract class ActivityBindingModule {
      * into the subcomponent. If the subcomponent needs scopes, apply the scope annotations to
      * the method as well.
      */
-    // Example
-    //@ActivityScoped
-    //@ContributesAndroidInjector(modules = arrayOf(ModuleNameWhichHasActivityInjection::class))
-    //abstract fun someActivity(): SomeActivity
+    @ActivityScope
+    @ContributesAndroidInjector
+    abstract fun layoutPositioningActivity(): LayoutPositioningDemoActivity
 }

app/src/main/java/com/hossainkhan/android/demo/dagger/ActivityScope.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2018 Hossain Khan
+ *
+ * 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.
+ */
+
+package com.hossainkhan.android.demo.dagger
+
+import javax.inject.Scope
+
+@Scope
+@Retention(AnnotationRetention.RUNTIME)
+annotation class ActivityScope
+

app/src/main/java/com/hossainkhan/android/demo/dagger/DataStoreModule.kt

@@ -18,6 +18,7 @@ package com.hossainkhan.android.demo.dagger
 
 import android.content.Context
 import android.content.SharedPreferences
+import android.content.res.Resources
 import dagger.Module
 import dagger.Provides
 
@@ -27,4 +28,9 @@ class DataStoreModule {
     internal fun provideSharedPreferences(context: Context): SharedPreferences {
         return context.getSharedPreferences("app_preferences", Context.MODE_PRIVATE)
     }
+
+    @Provides
+    internal fun provideAndroidResoures(context: Context): Resources {
+        return context.resources
+    }
 }

app/src/main/java/com/hossainkhan/android/demo/dagger/DemoApplicationComponent.kt

@@ -20,9 +20,12 @@ import android.app.Application
 import com.hossainkhan.android.demo.base.DemoApplication
 import dagger.BindsInstance
 import dagger.Component
+import javax.inject.Singleton
 
+@Singleton
 @Component(modules = arrayOf(
         ApplicationModule::class,
+        ActivityBindingModule::class,
         DataStoreModule::class,
         MainActivityModule::class))
 interface DemoApplicationComponent {

app/src/main/java/com/hossainkhan/android/demo/data/AppDataStore.kt

@@ -23,7 +23,8 @@ import javax.inject.Inject
  * Application wide data storage and preferences backed by [SharedPreferences].
  */
 class AppDataStore @Inject constructor(
-        private val preferences: SharedPreferences) {
+        private val preferences: SharedPreferences,
+        val layoutStore: LayoutDataStore) {
 
     private companion object {
         private const val PREF_KEY_IS_FIRST_TIME_USER = "KEY_IS_FIRST_TIME_USER"

app/src/main/java/com/hossainkhan/android/demo/data/LayoutDataStore.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018 Hossain Khan
+ *
+ * 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.
+ */
+
+package com.hossainkhan.android.demo.data
+
+import android.content.res.Resources
+import android.support.annotation.LayoutRes
+import com.hossainkhan.android.demo.R
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class LayoutDataStore @Inject constructor(
+        private val resources: Resources) {
+    private val supportedLayoutInfos = listOf(
+            LayoutInformation(
+                    layoutResourceId = R.layout.activity_positioning_top_left,
+                    title = "Positioning: Top Left",
+                    description = "Top left using constraints."),
+            LayoutInformation(
+                    layoutResourceId = R.layout.activity_positioning_centered,
+                    title = "Positioning: Centered",
+                    description = "Centered view using constraints on top-bottom and left-right.")
+    )
+
+    /**
+     * A map of layout information by layout resource ID.
+     */
+    val layoutsInfos: Map<Int, LayoutInformation> by lazy {
+        supportedLayoutInfos.associateBy { it.layoutResourceId }
+    }
+
+    /**
+     * Returns Github URL for layout resource file for this project.
+     */
+    fun getLayoutUrl(@LayoutRes layoutResourceId: Int): String {
+        return resources.getResourceName(layoutResourceId)
+    }
+}