done

.gitignore

@@ -0,0 +1,8 @@
+.gradle
+/local.properties
+.idea
+.DS_Store
+/app/build
+/app/libs
+/build
+/captures

app/.gitignore

@@ -0,0 +1,3 @@
+/src/androidTest
+/src/test
+/build

app/app.iml

@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id=":app" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" external.system.module.group="compass" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet type="android-gradle" name="Android-Gradle">
+      <configuration>
+        <option name="GRADLE_PROJECT_PATH" value=":app" />
+      </configuration>
+    </facet>
+    <facet type="android" name="Android">
+      <configuration>
+        <option name="SELECTED_BUILD_VARIANT" value="debug" />
+        <option name="SELECTED_TEST_ARTIFACT" value="_android_test_" />
+        <option name="ASSEMBLE_TASK_NAME" value="assembleDebug" />
+        <option name="COMPILE_JAVA_TASK_NAME" value="compileDebugSources" />
+        <option name="ASSEMBLE_TEST_TASK_NAME" value="assembleDebugAndroidTest" />
+        <option name="COMPILE_JAVA_TEST_TASK_NAME" value="compileDebugAndroidTestSources" />
+        <afterSyncTasks>
+          <task>generateDebugAndroidTestSources</task>
+          <task>generateDebugSources</task>
+        </afterSyncTasks>
+        <option name="ALLOW_USER_CONFIGURATION" value="false" />
+        <option name="MANIFEST_FILE_RELATIVE_PATH" value="/src/main/AndroidManifest.xml" />
+        <option name="RES_FOLDER_RELATIVE_PATH" value="/src/main/res" />
+        <option name="RES_FOLDERS_RELATIVE_PATH" value="file://$MODULE_DIR$/src/main/res" />
+        <option name="ASSETS_FOLDER_RELATIVE_PATH" value="/src/main/assets" />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="false">
+    <output url="file://$MODULE_DIR$/build/intermediates/classes/debug" />
+    <output-test url="file://$MODULE_DIR$/build/intermediates/classes/androidTest/debug" />
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/r/debug" isTestSource="false" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/aidl/debug" isTestSource="false" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/buildConfig/debug" isTestSource="false" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/rs/debug" isTestSource="false" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/debug" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/resValues/debug" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/r/androidTest/debug" isTestSource="true" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/aidl/androidTest/debug" isTestSource="true" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/buildConfig/androidTest/debug" isTestSource="true" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/source/rs/androidTest/debug" isTestSource="true" generated="true" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/rs/androidTest/debug" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/build/generated/res/resValues/androidTest/debug" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/debug/res" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/debug/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/debug/assets" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/debug/aidl" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/debug/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/debug/jni" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/debug/rs" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/res" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/assets" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/aidl" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/jni" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/rs" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/res" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/resources" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/assets" type="java-test-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/aidl" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/java" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/jni" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/androidTest/rs" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/assets" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/bundles" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/classes" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/coverage-instrumented-classes" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dependency-cache" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex-cache" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/appcompat-v7/23.1.0/jars" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/support-v4/23.1.0/jars" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/jacoco" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/javaResources" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/libs" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/lint" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/manifests" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/ndk" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/pre-dexed" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/proguard" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/res" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/rs" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/symbols" />
+      <excludeFolder url="file://$MODULE_DIR$/build/outputs" />
+      <excludeFolder url="file://$MODULE_DIR$/build/tmp" />
+    </content>
+    <orderEntry type="jdk" jdkName="Android API 23 Platform" jdkType="Android SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" exported="" name="support-annotations-23.1.0" level="project" />
+    <orderEntry type="library" exported="" name="appcompat-v7-23.1.0" level="project" />
+    <orderEntry type="library" exported="" name="support-v4-23.1.0" level="project" />
+  </component>
+</module>

app/build.gradle

@@ -0,0 +1,26 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 23
+    buildToolsVersion "23.0.2"
+
+    defaultConfig {
+        applicationId "com.zholus.artem.compass"
+        minSdkVersion 15
+        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-v7:23.1.0'
+}

app/proguard-rules.pro

@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /home/artem/Android/Sdk/tools/proguard/proguard-android.txt
+# 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/main/AndroidManifest.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.zholus.artem.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=".CompassActivity"
+            android:screenOrientation="portrait">
+            <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/zholus/artem/compass/ArrowView.java

@@ -0,0 +1,52 @@
+package com.zholus.artem.compass;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.util.AttributeSet;
+import android.view.View;
+
+import java.util.Random;
+
+/**
+ * Created by artem on 23.12.15.
+ */
+public class ArrowView extends View {
+    private float angle;
+
+    private final Paint redArrow = new Paint();
+    private final Paint blueArrow = new Paint();
+
+    public ArrowView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        redArrow.setColor(Color.RED);
+        redArrow.setStrokeWidth(10);
+        blueArrow.setColor(Color.BLUE);
+        blueArrow.setStrokeWidth(10);
+    }
+
+    public void setAngle(float angle) {
+        this.angle = angle;
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+
+        int width = getWidth();
+        int height = getHeight();
+
+        int minSize = Math.min(width, height) / 2;
+
+        int centerX = width / 2;
+        int centerY = height / 2;
+        canvas.drawLine(centerX, centerY, (float) (centerX + minSize * Math.cos(angle)),
+                (float) (centerY + minSize * Math.sin(angle)), redArrow);
+        canvas.drawLine(centerX, centerY, (float)(centerX - minSize * Math.cos(angle)),
+                (float)(centerY - minSize * Math.sin(angle)), blueArrow);
+
+        invalidate();
+    }
+}

app/src/main/java/com/zholus/artem/compass/CompassActivity.java

@@ -0,0 +1,50 @@
+package com.zholus.artem.compass;
+
+import android.app.Activity;
+import android.hardware.Sensor;
+import android.hardware.SensorEvent;
+import android.hardware.SensorEventListener;
+import android.hardware.SensorManager;
+import android.os.Bundle;
+
+
+public final class CompassActivity extends Activity implements SensorEventListener {
+
+    private ArrowView arrow;
+    private Sensor sensor;
+    private SensorManager sensorManager;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_compass);
+
+        arrow = (ArrowView) findViewById(R.id.arrow);
+        arrow.setAngle(0f);
+
+        sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
+        sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+
+        sensorManager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_FASTEST);
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        sensorManager.unregisterListener(this);
+    }
+
+    @Override
+    public void onSensorChanged(SensorEvent event) {
+        arrow.setAngle((float)Math.PI/2f - event.values[0] * (float)Math.PI / 180f);
+    }
+
+    @Override
+    public void onAccuracyChanged(Sensor sensor, int accuracy) {
+    }
+}

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

@@ -0,0 +1,9 @@
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_height="match_parent"
+    android:layout_width="match_parent" >
+    <com.zholus.artem.compass.ArrowView
+        android:id="@+id/arrow"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+    </FrameLayout>

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>

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:1.3.0'
+
+        // 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
+}

compass.iml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="compass" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" external.system.module.group="" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet type="java-gradle" name="Java-Gradle">
+      <configuration>
+        <option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/build" />
+        <option name="BUILDABLE" value="false" />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.gradle" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

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