initial commit

.gitignore

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+# Built application files
+/*/build/
+
+# Crashlytics configuations
+com_crashlytics_export_strings.xml
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Gradle generated files
+.gradle/
+
+# Signing files
+.signing/
+
+# User-specific configurations
+.idea/libraries/
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/.name
+.idea/compiler.xml
+.idea/copyright/profiles_settings.xml
+.idea/encodings.xml
+.idea/misc.xml
+.idea/modules.xml
+.idea/scopes/scope_settings.xml
+.idea/vcs.xml
+*.iml
+
+# OS-specific files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 23
+    buildToolsVersion "23.0.2"
+
+    defaultConfig {
+        applicationId "com.lixissimus.thedrummersapp"
+        minSdkVersion 21
+        targetSdkVersion 21
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(include: ['*.jar'], dir: 'libs')
+    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:appcompat-v7:23.2.0'
+    compile 'com.google.android.gms:play-services-appindexing:8.1.0'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in C:\Users\Felix\AppData\Local\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/androidTest/java/com/lixissimus/thedrummersapp/ApplicationTest.java

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+package com.lixissimus.thedrummersapp;
+
+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

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.lixissimus.thedrummersapp">
+
+
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+
+    <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>
+        <!-- ATTENTION: This was auto-generated to add Google Play services to your project for
+             App Indexing.  See https://g.co/AppIndexing/AndroidStudio for more information. -->
+        <meta-data
+            android:name="com.google.android.gms.version"
+            android:value="@integer/google_play_services_version" />
+    </application>
+
+</manifest>

app/src/main/java/com/lixissimus/thedrummersapp/MainActivity.java

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+package com.lixissimus.thedrummersapp;
+
+import android.media.AudioFormat;
+import android.media.AudioRecord;
+import android.media.MediaRecorder;
+import android.net.Uri;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.google.android.gms.appindexing.Action;
+import com.google.android.gms.appindexing.AppIndex;
+import com.google.android.gms.common.api.GoogleApiClient;
+
+import be.tarsos.dsp.pitch.PitchDetectionResult;
+import be.tarsos.dsp.pitch.Yin;
+
+public class MainActivity extends AppCompatActivity {
+
+    private static final String TAG = "DrummersApp";
+
+    final int SAMPLING_RATE = 8000;
+
+    private boolean recording = false;
+    /**
+     * ATTENTION: This was auto-generated to implement the App Indexing API.
+     * See https://g.co/AppIndexing/AndroidStudio for more information.
+     */
+    private GoogleApiClient client;
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        Button startButton = (Button) findViewById(R.id.startButton);
+        Button stopButton = (Button) findViewById(R.id.stopButton);
+
+        startButton.setOnClickListener(
+                new Button.OnClickListener() {
+                    public void onClick(View v) {
+                        startRecording();
+                    }
+                }
+        );
+
+        stopButton.setOnClickListener(
+                new Button.OnClickListener() {
+                    public void onClick(View v) {
+                        stopRecording();
+                    }
+                }
+        );
+        // ATTENTION: This was auto-generated to implement the App Indexing API.
+        // See https://g.co/AppIndexing/AndroidStudio for more information.
+        client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
+    }
+
+    private void startRecording() {
+        if (recording) {
+            return;
+        }
+        Log.i(TAG, "Start recording");
+        recording = true;
+
+        new Thread(
+                new Runnable() {
+                    @Override
+                    public void run() {
+                        Log.i(TAG, "micThread started...");
+
+                        final int CHANNEL = AudioFormat.CHANNEL_IN_MONO;
+                        final int FORMAT = AudioFormat.ENCODING_PCM_16BIT;
+                        final int BUFFER_SIZE = AudioRecord.getMinBufferSize(
+                                SAMPLING_RATE, CHANNEL, FORMAT);
+
+                        short[] buffer = new short[BUFFER_SIZE];
+
+                        Log.d(TAG, "Creating the AudioRecord");
+                        AudioRecord recorder = new AudioRecord(
+                                MediaRecorder.AudioSource.MIC,
+                                SAMPLING_RATE,
+                                CHANNEL,
+                                FORMAT,
+                                BUFFER_SIZE * 10
+                        );
+
+                        Log.d(TAG, "AudioRecord recording...");
+                        recorder.startRecording();
+
+                        while (recording) {
+                            int read = recorder.read(buffer, 0, buffer.length);
+
+                            onNewBufferRead(buffer, read);
+
+                            try {
+                                Thread.sleep(50);
+                            } catch (InterruptedException e) {
+                                e.printStackTrace();
+                            }
+                        }
+
+                        recorder.stop();
+                        recorder.release();
+                    }
+                }
+        ).start();
+    }
+
+    private void stopRecording() {
+        if (!recording) {
+            return;
+        }
+        Log.i(TAG, "Stop Recording");
+        recording = false;
+    }
+
+    private void onNewBufferRead(short[] buffer, int size) {
+        Yin pitchDetector = new Yin(SAMPLING_RATE, size);
+
+        final PitchDetectionResult result = pitchDetector.getPitch(shortBufferToFloat(buffer));
+        float freq = result.getPitch();
+        final float roundedFreq = Math.round(freq * 10) / 10.0f;
+
+
+        if (freq < 0) {
+            return;
+        }
+
+        final TextView textField = (TextView) findViewById(R.id.textViewFrequency);
+
+        textField.post(new Runnable() {
+            @Override
+            public void run() {
+                textField.setText(String.format("%.1f", roundedFreq));
+            }
+        });
+    }
+
+    private float[] shortBufferToFloat(short[] sBuffer) {
+        float[] fBuffer = new float[sBuffer.length];
+        int i = 0;
+        for (short b : sBuffer) {
+            fBuffer[i] = ((float) b) / (float) Math.pow(2, 15);
+            i++;
+        }
+
+        return fBuffer;
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+
+        // ATTENTION: This was auto-generated to implement the App Indexing API.
+        // See https://g.co/AppIndexing/AndroidStudio for more information.
+        client.connect();
+        Action viewAction = Action.newAction(
+                Action.TYPE_VIEW, // TODO: choose an action type.
+                "Main Page", // TODO: Define a title for the content shown.
+                // TODO: If you have web page content that matches this app activity's content,
+                // make sure this auto-generated web page URL is correct.
+                // Otherwise, set the URL to null.
+                Uri.parse("http://host/path"),
+                // TODO: Make sure this auto-generated app deep link URI is correct.
+                Uri.parse("android-app://com.lixissimus.thedrummersapp/http/host/path")
+        );
+        AppIndex.AppIndexApi.start(client, viewAction);
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+
+        // ATTENTION: This was auto-generated to implement the App Indexing API.
+        // See https://g.co/AppIndexing/AndroidStudio for more information.
+        Action viewAction = Action.newAction(
+                Action.TYPE_VIEW, // TODO: choose an action type.
+                "Main Page", // TODO: Define a title for the content shown.
+                // TODO: If you have web page content that matches this app activity's content,
+                // make sure this auto-generated web page URL is correct.
+                // Otherwise, set the URL to null.
+                Uri.parse(null),
+                // TODO: Make sure this auto-generated app deep link URI is correct.
+                Uri.parse("android-app://com.lixissimus.thedrummersapp/http/host/path")
+        );
+        AppIndex.AppIndexApi.end(client, viewAction);
+        client.disconnect();
+    }
+}