done

.gitignore

@@ -0,0 +1,7 @@
+*.iml
+.gradle
+/local.properties
+.idea/
+.DS_Store
+/build
+/captures

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle

@@ -0,0 +1,26 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 23
+    buildToolsVersion "23.0.2"
+
+    defaultConfig {
+        applicationId "ru.ifmo.android_2015.compass"
+        minSdkVersion 16
+        targetSdkVersion 23
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:appcompat-v7:23.1.1'
+}

app/proguard-rules.pro

@@ -0,0 +1,15 @@
+# Add project specific ProGuard rules here.
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# 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 *;
+#}

app/src/androidTest/java/ru/ifmo/android_2015/compass/ApplicationTest.java

@@ -0,0 +1,13 @@
+package ru.ifmo.android_2015.compass;
+
+import android.app.Application;
+import android.test.ApplicationTestCase;
+
+/**
+ * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
+ */
+public class ApplicationTest extends ApplicationTestCase<Application> {
+    public ApplicationTest() {
+        super(Application.class);
+    }
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="ru.ifmo.android_2015.compass">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        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/ru/ifmo/android_2015/compass/CompassView.java

@@ -0,0 +1,60 @@
+package ru.ifmo.android_2015.compass;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.hardware.Sensor;
+import android.hardware.SensorEvent;
+import android.hardware.SensorEventListener;
+import android.util.AttributeSet;
+import android.view.View;
+
+/**
+ * @author Andreikapolin
+ * @date 13.01.16
+ */
+public class CompassView extends View implements SensorEventListener {
+
+    private final Paint circlePaint = new Paint();
+    private final Paint linePaint = new Paint();
+
+    private float lastX = 0;
+    private float lastY = 0;
+
+    public CompassView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        linePaint.setColor(0xFFFF9800);
+        circlePaint.setStrokeWidth(10);
+        linePaint.setStrokeWidth(10);
+        circlePaint.setStyle(Paint.Style.STROKE);
+    }
+
+    @Override
+    public void onSensorChanged(SensorEvent event) {
+        lastX = event.values[0];
+        lastY = event.values[1];
+        invalidate();
+    }
+
+    @Override
+    public void onAccuracyChanged(Sensor sensor, int accuracy) {}
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+
+        double x0 = 1.0 * getWidth() / 2;
+        double y0 = 1.0 * getHeight() / 2;
+        double R = 1.0 * Math.min(getWidth(), getHeight()) / 2.5;
+        canvas.drawCircle((float) x0, (float) y0, (float) R, circlePaint);
+
+        double innerR = R * 0.99;
+        double len = Math.sqrt(lastX * lastX + lastY * lastY);
+        double cos = lastX / len;
+        double sin = lastY / len;
+        double x1 = x0 + innerR * cos;
+        double y1 = y0 + innerR * sin;
+        canvas.drawLine((float) x0, (float) y0, (float) x1, (float) y1, linePaint);
+    }
+}

app/src/main/java/ru/ifmo/android_2015/compass/MainActivity.java

@@ -0,0 +1,34 @@
+package ru.ifmo.android_2015.compass;
+
+import android.hardware.Sensor;
+import android.hardware.SensorManager;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+
+public class MainActivity extends AppCompatActivity {
+
+private Sensor sensor;
+private SensorManager sensorManager;
+private CompassView compassView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
+        sensor = sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
+        compassView = (CompassView) findViewById(R.id.compassview);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        sensorManager.registerListener(compassView, sensor, SensorManager.SENSOR_DELAY_UI);
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        sensorManager.unregisterListener(compassView);
+    }
+}

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<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"
+    tools:context="ru.ifmo.android_2015.compass.MainActivity">
+
+    <ru.ifmo.android_2015.compass.CompassView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/compassview"
+        />
+</RelativeLayout>

app/src/main/res/values-w820dp/dimens.xml

@@ -0,0 +1,6 @@
+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

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

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

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

@@ -0,0 +1,5 @@
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>

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

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Compass</string>
+</resources>

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

@@ -0,0 +1,11 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>

app/src/test/java/ru/ifmo/android_2015/compass/ExampleUnitTest.java

@@ -0,0 +1,15 @@
+package ru.ifmo.android_2015.compass;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * To work on unit tests, switch the Test Artifact in the Build Variants view.
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() throws Exception {
+        assertEquals(4, 2 + 2);
+    }
+}

build.gradle

@@ -0,0 +1,23 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:1.5.0'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

gradle.properties

@@ -0,0 +1,18 @@
+# Project-wide Gradle settings.
+
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+# Default value: -Xmx10248m -XX:MaxPermSize=256m
+# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Wed Oct 21 11:34:03 PDT 2015
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.8-all.zip