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Commit 21e3b96

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Tobias Scholze
committed
Added source to the example.
1 parent 73b3f2d commit 21e3b96

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18 files changed

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‎app/.gitignore

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/build

‎app/build.gradle

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apply plugin: 'com.android.application'
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android {
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compileSdkVersion 26
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defaultConfig {
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applicationId "io.github.tscholze.firebasepager"
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minSdkVersion 26
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targetSdkVersion 26
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
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}
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}
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}
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dependencies {
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implementation fileTree(dir: 'libs', include: ['*.jar'])
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implementation 'com.google.android.things.contrib:driver-ht16k33:0.3'
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implementation 'com.android.support:support-v4:26.1.0'
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implementation 'com.google.firebase:firebase-messaging:11.0.4'
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testImplementation 'junit:junit:4.12'
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androidTestImplementation 'com.android.support.test:runner:1.0.1'
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androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
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compileOnly 'com.google.android.things:androidthings:+'
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}
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apply plugin: 'com.google.gms.google-services'

‎app/proguard-rules.pro

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎app/src/androidTest/java/io/github/tscholze/firebasepager/ExampleInstrumentedTest.java

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package io.github.tscholze.firebasepager;
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import android.content.Context;
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import android.support.test.InstrumentationRegistry;
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import android.support.test.runner.AndroidJUnit4;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import static org.junit.Assert.*;
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/**
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* Instrumented test, which will execute on an Android device.
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*
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* @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
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*/
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@RunWith(AndroidJUnit4.class)
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public class ExampleInstrumentedTest
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{
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@Test
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public void useAppContext() throws Exception
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{
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// Context of the app under test.
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Context appContext = InstrumentationRegistry.getTargetContext();
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assertEquals("io.github.tscholze.firebasepager", appContext.getPackageName());
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}
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}

‎app/src/main/AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="io.github.tscholze.firebasepager">
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<application>
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<uses-library android:name="com.google.android.things" />
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<activity android:name=".MainActivity">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.IOT_LAUNCHER" />
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<category android:name="android.intent.category.DEFAULT" />
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</intent-filter>
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</activity>
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<service
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android:name=".MyFirebaseMessagingService">
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<intent-filter>
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<action android:name="com.google.firebase.MESSAGING_EVENT"/>
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</intent-filter>
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</service>
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</application>
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</manifest>

‎app/src/main/java/io/github/tscholze/firebasepager/MainActivity.java

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package io.github.tscholze.firebasepager;
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import android.app.Activity;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.os.Bundle;
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import java.io.IOException;
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import java.util.LinkedList;
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import java.util.List;
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import android.os.Handler;
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import android.util.Log;
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import com.google.android.things.contrib.driver.ht16k33.AlphanumericDisplay;
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import com.google.firebase.iid.FirebaseInstanceId;
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import com.google.firebase.messaging.FirebaseMessaging;
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/**
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* This activity is responsible to display messages from Firebase
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* Cloud Messaging notifications on an alphanumerical display.
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*/
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public class MainActivity extends Activity implements IRunningTextContext
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{
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private static final String TAG = MainActivity.class.getSimpleName();
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private static final String TOPIC_IDENTIFIER = "messages";
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private static final String I2C1_BUS_IDENTIFIER = "I2C1";
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private AlphanumericDisplay alphanumericDisplay;
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private List<String> messages = new LinkedList<>();
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private Handler runningTextHandler;
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private BroadcastReceiver broadcastReceiver = new BroadcastReceiver()
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{
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@Override
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public void onReceive(Context context, Intent intent)
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{
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messages.add(intent.getStringExtra(MyFirebaseMessagingService.EXTRA_BODY));
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if (messages.size() == 1)
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{
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postTextToDisplay();
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}
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}
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};
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@Override
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protected void onCreate(Bundle savedInstanceState)
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{
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super.onCreate(savedInstanceState);
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FirebaseMessaging.getInstance().subscribeToTopic(TOPIC_IDENTIFIER);
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Log.d(TAG, "FCM token: " + FirebaseInstanceId.getInstance().getToken());
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setupAlphanumericDisplay();
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runningTextHandler = new Handler();
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IntentFilter intentFilter = new IntentFilter(MyFirebaseMessagingService.NEW_MESSAGE_ITENT);
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registerReceiver(broadcastReceiver, intentFilter);
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messages.add("Teeeeeest");
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postTextToDisplay();
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}
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@Override
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protected void onDestroy()
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{
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super.onDestroy();
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destroyAlphanumericDisplay();
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FirebaseMessaging.getInstance().unsubscribeFromTopic(TOPIC_IDENTIFIER);
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}
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@Override
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public AlphanumericDisplay getAlphaNumericDisplay()
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{
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return alphanumericDisplay;
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}
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@Override
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public Handler getRunningTextHandler()
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{
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return runningTextHandler;
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}
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@Override
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public void onRunningTextFinished()
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{
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Log.d(TAG, "Running text finished");
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postTextToDisplay();
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}
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private void setupAlphanumericDisplay()
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{
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try
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{
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alphanumericDisplay = new AlphanumericDisplay(I2C1_BUS_IDENTIFIER);
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alphanumericDisplay.setBrightness(1.0f);
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alphanumericDisplay.setEnabled(true);
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alphanumericDisplay.clear();
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}
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catch (IOException e)
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{
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Log.e(TAG, "Error configuring display", e);
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}
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}
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private void destroyAlphanumericDisplay()
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{
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if (alphanumericDisplay != null)
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{
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Log.i(TAG, "Closing display");
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try
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{
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alphanumericDisplay.close();
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}
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catch (IOException e)
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{
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Log.e(TAG, "Error closing display", e);
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}
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finally
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{
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alphanumericDisplay = null;
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}
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}
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}
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private void postTextToDisplay()
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{
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if (messages.isEmpty())
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{
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return;
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}
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String message = messages.get(0);
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Log.d(TAG, "Will post new message: "+ message);
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RunningTextRunnable runnable = new RunningTextRunnable(this, message);
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messages.remove(0);
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runningTextHandler.post(runnable);
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}
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}

‎app/src/main/java/io/github/tscholze/firebasepager/RunningTextRunnable.java

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package io.github.tscholze.firebasepager;
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import android.util.Log;
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import java.io.IOException;
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import io.github.tscholze.firebasepager.interfaces.IRunningTextContext;
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/**
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* Running text Runnable that prepares the given text to be
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* more segment display friendly.
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*
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* Original inspiration:
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* - Author: JS Koran (https://github.com/jdkoren)
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* - Gist: https://gist.github.com/jdkoren/a3c37883f839c0b3adcee43821128329
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*/
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public class RunningTextRunnable implements Runnable
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{
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private static final String TAG = RunningTextRunnable.class.getSimpleName();
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private static final int MAX_CHARS_PER_CYCLE = 4;
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private IRunningTextContext context;
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private String text;
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private int beginIndex = 0;
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private boolean isFirstRun = true;
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RunningTextRunnable(IRunningTextContext context, String text)
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{
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this.context = context;
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StringBuilder stringBuilder = new StringBuilder();
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// Append leading spaces (text runs completely from right to left).
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for(int i = 0; i < MAX_CHARS_PER_CYCLE; i++)
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{
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stringBuilder.append(' ');
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}
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// Append trimmed text.
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stringBuilder.append(text.trim());
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// Append trailing spaces.
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int spacesCount = MAX_CHARS_PER_CYCLE - (text.length() % MAX_CHARS_PER_CYCLE);
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for(int i = 0; i < spacesCount; i++)
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{
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stringBuilder.append(' ');
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}
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this.text = stringBuilder.toString();
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Log.d(TAG, "Running text with trailed text: '"+this.text+"'");
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}
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@Override
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public void run()
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{
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// Try to display the current visible part of the text string.
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try
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{
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context.getAlphaNumericDisplay().display(text.substring(beginIndex));
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}
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catch (IOException e)
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{
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e.printStackTrace();
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}
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// Check if finished parameters are valid.
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if(!isFirstRun && beginIndex == 0)
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{
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context.onRunningTextFinished();
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return;
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}
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// Update the beginIndex for the next cycle.
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beginIndex = (beginIndex + 1) % text.length();
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isFirstRun = false;
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// Post next cycle execution with a delay.
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context.getRunningTextHandler().postDelayed(this, 750L);
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}
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}

‎app/src/main/java/io/github/tscholze/firebasepager/interfaces/IRunningTextContext.java

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package io.github.tscholze.firebasepager.interfaces;
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import android.os.Handler;
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import com.google.android.things.contrib.driver.ht16k33.AlphanumericDisplay;
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/**
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* Describes the required information and listener of a RunningTextRunnable.
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*/
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public interface IRunningTextContext
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{
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/**
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* Gets the display that will be used to show
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* information
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* @return An assigned AlphanumericDisplay.
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*/
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AlphanumericDisplay getAlphaNumericDisplay();
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/**
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* Gets the activity handler to post runnables.
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* @return Assigned handler.
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*/
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Handler getRunningTextHandler();
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/**
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* Raised if running text has been finished.
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*/
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void onRunningTextFinished();
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}

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