first commit of ARCore-Data-Logger

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 29
+    buildToolsVersion "29.0.1"
+    defaultConfig {
+        applicationId "com.pjinkim.arcore_data_logger"
+        minSdkVersion 26
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test:runner:1.2.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+}

app/proguard-rules.pro

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

app/src/androidTest/java/com/pjinkim/arcore_data_logger/ExampleInstrumentedTest.java

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

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.pjinkim.arcore_data_logger">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/pjinkim/arcore_data_logger/FileStreamer.java

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+package com.pjinkim.arcore_data_logger;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.util.Log;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.security.KeyException;
+import java.util.Calendar;
+import java.util.HashMap;
+import java.util.Locale;
+
+public class FileStreamer {
+
+    // properties
+    private final static String LOG_TAG = FileStreamer.class.getName();
+
+    private Context mContext;
+    private HashMap<String, BufferedWriter> mFileWriters = new HashMap<>();
+    private String mOutputFolder;
+
+
+    // constructor
+    public FileStreamer(Context mContext, final String mOutputFolder) {
+        this.mContext = mContext;
+        this.mOutputFolder = mOutputFolder;
+    }
+
+
+    // methods
+    public void addFile(final String writerId, final String fileName) throws IOException {
+
+        // check if there is a already generated text file
+        if (mFileWriters.containsKey(writerId)) {
+            Log.w(LOG_TAG, "addFile: " + writerId + " already exist.");
+            return;
+        }
+
+        // get current time information
+        Calendar fileTimestamp = Calendar.getInstance();
+        String timeHeader = "# Created at " + fileTimestamp.getTime().toString() + " in Burnaby Canada \n";
+
+        // generate text file
+        BufferedWriter newWriter = createFile(mOutputFolder + "/" + fileName, timeHeader);
+        mFileWriters.put(writerId, newWriter);
+    }
+
+    private BufferedWriter createFile(final String path, final String timeHeader) throws IOException {
+
+        File file = new File(path);
+        BufferedWriter writer = new BufferedWriter((new FileWriter(file)));
+
+        Intent scanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+        scanIntent.setData(Uri.fromFile(file));
+        mContext.sendBroadcast(scanIntent);
+        if ((timeHeader != null) && (timeHeader.length() != 0)) {
+            writer.append(timeHeader);
+            writer.flush();
+        }
+        return writer;
+    }
+
+    public String getOutputFolder() {
+        return mOutputFolder;
+    }
+
+    public BufferedWriter getFileWriter(final String writerId) {
+        return mFileWriters.get(writerId);
+    }
+
+    public void addRecord(final long timestamp, final String writerId, final int numValues, final float[] values) throws IOException, KeyException {
+
+        // execute the block with only one thread
+        synchronized (this) {
+
+            // get BufferedWriter of 'writerId'
+            BufferedWriter writer = getFileWriter(writerId);
+            if (writer == null) {
+                throw new KeyException("addRecord: " + writerId + " not found.");
+            }
+
+            // record timestamp, and values in text file
+            StringBuilder stringBuilder = new StringBuilder();
+            stringBuilder.append(timestamp);
+            for (int i = 0; i < numValues; ++i) {
+                stringBuilder.append(String.format(Locale.US, " %.6f", values[i]));
+            }
+            stringBuilder.append(" \n");
+            writer.write(stringBuilder.toString());
+        }
+    }
+
+    public void endFiles() throws IOException {
+
+        // execute the block with only one thread
+        synchronized (this) {
+            for (BufferedWriter eachWriter : mFileWriters.values()) {
+                eachWriter.flush();
+                eachWriter.close();
+            }
+        }
+    }
+}

app/src/main/java/com/pjinkim/arcore_data_logger/MainActivity.java

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+package com.pjinkim.arcore_data_logger;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.app.Activity;
+import android.app.ActivityManager;
+import android.content.Context;
+import android.os.Build;
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.Toast;
+
+public class MainActivity extends AppCompatActivity {
+
+    // properties
+    private final static String LOG_TAG = MainActivity.class.getName();
+
+
+    // Android activity lifecycle states
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+    }
+
+
+    // methods
+    public static boolean checkIsSupportedDeviceOrFinish(final Activity activity) {
+
+        // check Android version
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
+            Log.e(LOG_TAG, "Sceneform requires Android N or later");
+            Toast.makeText(activity, "Sceneform requires Android N or later", Toast.LENGTH_LONG).show();
+            activity.finish();
+            return false;
+        }
+
+        String openGlVersionString = ((ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE))
+                .getDeviceConfigurationInfo()
+                .getGlEsVersion();
+
+        // check OpenGL version
+        if (Double.parseDouble(openGlVersionString) < MIN_OPENGL_VERSION) {
+            Log.e(LOG_TAG, "Sceneform requires OpenGL ES 3.0 later");
+            Toast.makeText(activity, "Sceneform requires OpenGL ES 3.0 or later", Toast.LENGTH_LONG).show();
+            activity.finish();
+            return false;
+        }
+        return true;
+    }
+
+}

app/src/main/java/com/pjinkim/arcore_data_logger/OutputDirectoryManager.java

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+package com.pjinkim.arcore_data_logger;
+
+import android.os.Environment;
+import android.util.Log;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+
+public class OutputDirectoryManager {
+
+    // properties
+    private final static String LOG_TAG = OutputDirectoryManager.class.getName();
+
+    private String mOutputDirectory;
+
+
+    // constructors
+    public OutputDirectoryManager(final String prefix, final String suffix) throws FileNotFoundException {
+        update(prefix, suffix);
+    }
+
+    public OutputDirectoryManager(final String prefix) throws FileNotFoundException {
+        update(prefix);
+    }
+
+    public OutputDirectoryManager() throws FileNotFoundException {
+        update();
+    }
+
+
+    // methods
+    private void update(final String prefix, final String suffix) throws FileNotFoundException {
+
+        // initialize folder name with current time information
+        Calendar currentTime = Calendar.getInstance();
+        SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddhhmmss");
+        File externalDirectory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
+        String folderName = formatter.format(currentTime.getTime());
+
+        // combine prefix and suffix
+        if (prefix != null) {
+            folderName = prefix + folderName;
+        }
+        if (suffix != null) {
+            folderName = folderName + suffix;
+        }
+
+        // generate output directory folder
+        File outputDirectory = new File(externalDirectory.getAbsolutePath() + "/" + folderName);
+        if (!outputDirectory.exists()) {
+            if (!outputDirectory.mkdir()) {
+                Log.e(LOG_TAG, "update: Cannot create output directory.");
+                throw new FileNotFoundException();
+            }
+        }
+        mOutputDirectory = outputDirectory.getAbsolutePath();
+        Log.i(LOG_TAG, "update: Output directory: " + outputDirectory.getAbsolutePath());
+    }
+
+    private void update(final String prefix) throws FileNotFoundException {
+        update(prefix, null);
+    }
+
+    private void update() throws FileNotFoundException {
+        update(null, null);
+    }
+
+
+    // getter and setter
+    public String getOutputDirectory() {
+        return mOutputDirectory;
+    }
+}