Added (messy) Visualizer code

Author: Felix Palmer

AndroidManifest.xml

@@ -21,5 +21,7 @@
             </intent-filter>
         </activity>
     </application>
+    
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
 
 </manifest>

res/drawable/bg.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape 
+  xmlns:android="http://schemas.android.com/apk/res/android"
+  android:shape="rectangle">
+  <gradient 
+    android:startColor="#acacac" 
+    android:centerColor="#4f4f4f"
+    android:endColor="#3f3f3f" 
+    android:angle="-90">
+  </gradient>
+</shape>

res/layout/main.xml

@@ -2,12 +2,21 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
+    android:background="@drawable/bg"
     android:orientation="vertical" >
 
     <FrameLayout
         android:layout_width="fill_parent"
         android:layout_height="0dp"
-        android:layout_weight="1" >
+        android:layout_margin="10dp"
+        android:layout_weight="1"
+        android:background="#000" >
+
+        <com.pheelicks.visualizer.VisualizerView
+            android:id="@+id/visualizerView"
+            android:layout_width="fill_parent"
+            android:layout_height="fill_parent" >
+        </com.pheelicks.visualizer.VisualizerView>
     </FrameLayout>
 
     <LinearLayout

src/com/pheelicks/visualizer/VisualizerActivity.java

@@ -2,11 +2,13 @@
 
 import android.app.Activity;
 import android.media.MediaPlayer;
+import android.media.audiofx.Visualizer;
 import android.os.Bundle;
 import android.view.View;
 
 public class VisualizerActivity extends Activity {
   private MediaPlayer mPlayer;
+  private Visualizer mVisualizer;
 
   /** Called when the activity is first created. */
   @Override
@@ -16,6 +18,55 @@ public void onCreate(Bundle savedInstanceState) {
 
     mPlayer = MediaPlayer.create(this, R.raw.test);
     mPlayer.setLooping(true);
+
+    linkVisualizer(mPlayer);
+  }
+
+  /**
+   * Links the visualizer to  a player
+   * TODO Refactor this into visualizer
+   * @param player
+   */
+  private void linkVisualizer(MediaPlayer player)
+  {
+
+    final VisualizerView visualizerView = (VisualizerView) findViewById(R.id.visualizerView);
+
+    // Create the Visualizer object and attach it to our media player.
+    mVisualizer = new Visualizer(player.getAudioSessionId());
+    mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);
+
+    // Pass through Visualizer data to VisualizerView
+    Visualizer.OnDataCaptureListener captureListener = new Visualizer.OnDataCaptureListener()
+    {
+      @Override
+      public void onWaveFormDataCapture(Visualizer visualizer, byte[] bytes,
+          int samplingRate)
+      {
+        visualizerView.updateVisualizer(bytes);
+      }
+
+      @Override
+      public void onFftDataCapture(Visualizer visualizer, byte[] bytes,
+          int samplingRate)
+      {
+        visualizerView.updateVisualizerFFT(bytes);
+      }
+    };
+
+    mVisualizer.setDataCaptureListener(captureListener,
+        Visualizer.getMaxCaptureRate() / 2, true, true);
+
+    // Enabled Visualizer and disable when we're done with the stream
+    mVisualizer.setEnabled(true);
+    mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
+    {
+      @Override
+      public void onCompletion(MediaPlayer mediaPlayer)
+      {
+        mVisualizer.setEnabled(false);
+      }
+    });
   }
 
   public void startPressed(View view)