Android Open Source - FPlayAndroid Activity Visualizer

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License

The source code is released under:
Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the followin...
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Java Source Code

//
// FPlayAndroid is distributed under the FreeBSD License
//// www  .  j a v a  2 s .  co m
// Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.
//
// https://github.com/carlosrafaelgn/FPlayAndroid
//
package br.com.carlosrafaelgn.fplay.activity;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.graphics.Point;
import android.media.AudioManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Message;
import android.os.SystemClock;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnCreateContextMenuListener;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import br.com.carlosrafaelgn.fplay.R;
import br.com.carlosrafaelgn.fplay.list.Song;
import br.com.carlosrafaelgn.fplay.playback.Player;
import br.com.carlosrafaelgn.fplay.ui.BgButton;
import br.com.carlosrafaelgn.fplay.ui.BgColorStateList;
import br.com.carlosrafaelgn.fplay.ui.CustomContextMenu;
import br.com.carlosrafaelgn.fplay.ui.InterceptableLayout;
import br.com.carlosrafaelgn.fplay.ui.UI;
import br.com.carlosrafaelgn.fplay.ui.drawable.ColorDrawable;
import br.com.carlosrafaelgn.fplay.ui.drawable.TextIconDrawable;
import br.com.carlosrafaelgn.fplay.util.Timer;
import br.com.carlosrafaelgn.fplay.visualizer.Visualizer;
import br.com.carlosrafaelgn.fplay.visualizer.VisualizerView;

public final class ActivityVisualizer extends Activity implements Runnable, MainHandler.Callback, Player.PlayerObserver, Player.PlayerDestroyedObserver, View.OnClickListener, MenuItem.OnMenuItemClickListener, OnCreateContextMenuListener, View.OnTouchListener, Timer.TimerHandler {
  @SuppressLint("InlinedApi")
  @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
  private static final class SystemUIObserver implements View.OnSystemUiVisibilityChangeListener {
    private View decor;
    private MainHandler.Callback callback;
    
    public SystemUIObserver(View decor, MainHandler.Callback callback) {
      this.decor = decor;
      this.callback = callback;
    }
    
    @Override
    public void onSystemUiVisibilityChange(int visibility) {
      if (decor == null)
        return;
      if (callback != null)
        MainHandler.sendMessage(callback, MSG_SYSTEM_UI_CHANGED, visibility & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION, 0);
    }
    
    public void hide() {
      if (decor == null)
        return;
      try {
        decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
            View.SYSTEM_UI_FLAG_FULLSCREEN |
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
            View.SYSTEM_UI_FLAG_LOW_PROFILE |
            View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
            View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
            View.SYSTEM_UI_FLAG_IMMERSIVE);
      } catch (Throwable ex) {
      }
    }
    
    public void show() {
      if (decor == null)
        return;
      try {
        decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
            View.SYSTEM_UI_FLAG_FULLSCREEN |
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
            //View.SYSTEM_UI_FLAG_LOW_PROFILE |
            View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
            //View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
            View.SYSTEM_UI_FLAG_IMMERSIVE |
            View.SYSTEM_UI_FLAG_VISIBLE);
      } catch (Throwable ex) {
      }
    }
    
    public void prepare() {
      show();
      if (decor == null)
        return;
      try {
        decor.setOnSystemUiVisibilityChangeListener(this);
      } catch (Throwable ex) {
      }
    }
    
    public void cleanup() {
      if (decor != null) {
        try {
          decor.setOnSystemUiVisibilityChangeListener(null);
        } catch (Throwable ex) {
        }
        decor = null;
      }
      callback = null;
    }
  }
  
  private static final int MSG_HIDE = 0x0400;
  private static final int MSG_SYSTEM_UI_CHANGED = 0x0401;
  private static final int MNU_ORIENTATION = 100;
  private android.media.audiofx.Visualizer fxVisualizer;
  private Visualizer visualizer;
  private UI.DisplayInfo info;
  private InterceptableLayout panelControls;
  private RelativeLayout panelTop;
  private LinearLayout panelSecondary;
  private BgButton btnGoBack, btnPrev, btnPlay, btnNext, btnMenu;
  private TextView lblTitle;
  private VisualizerView visualizerView;
  private volatile boolean alive, paused, reset, visualizerReady;
  private boolean fxVisualizerFailed, visualizerViewFullscreen, visualizerRequiresScreen, playing, isWindowFocused, panelTopWasVisibleOk;
  private float panelTopAlpha;
  private int fxVisualizerAudioSessionId, version, panelTopLastTime, panelTopHiding;
  private Object systemUIObserver;
  private Timer timer, uiAnimTimer;
  private BgColorStateList buttonColor, lblColor;
  private ColorDrawable panelTopBackground;
  
  private void hideAllUIDelayed() {
    if (!visualizerRequiresScreen)
      return;
    version++;
    MainHandler.removeMessages(this, MSG_HIDE);
    MainHandler.sendMessageDelayed(this, MSG_HIDE, version, 0, 4000);
  }
  
  @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
  private void prepareSystemUIObserver() {
    if (!visualizerRequiresScreen)
      return;
    if (systemUIObserver == null)
      systemUIObserver = new SystemUIObserver(getWindow().getDecorView(), this);
    ((SystemUIObserver)systemUIObserver).prepare();
  }
  
  @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
  private void hideSystemUI() {
    if (visualizerRequiresScreen && systemUIObserver != null)
      ((SystemUIObserver)systemUIObserver).hide();
  }
  
  @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
  private void showSystemUI() {
    if (visualizerRequiresScreen && systemUIObserver != null)
      ((SystemUIObserver)systemUIObserver).show();
  }
  
  @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
  private void cleanupSystemUIObserver() {
    if (visualizerRequiresScreen && systemUIObserver != null) {
      ((SystemUIObserver)systemUIObserver).cleanup();
      systemUIObserver = null;
    }
  }
  
  @Override
  public boolean onPrepareOptionsMenu(Menu menu) {
    if (btnMenu != null)
      CustomContextMenu.openContextMenu(btnMenu, this);
    return false;
  }
  
  private void prepareViews(boolean updateInfo) {
    if (info == null)
      return;
    
    if (updateInfo)
      info.getInfo(this);
    
    panelTopHiding = 0;
    panelTopAlpha = 1.0f;

    lblTitle.setPadding(0, UI._4dp, 0, UI._4dp);

    //panelTop.setLayoutParams(new InterceptableLayout.LayoutParams(info.isLandscape ? InterceptableLayout.LayoutParams.WRAP_CONTENT : InterceptableLayout.LayoutParams.MATCH_PARENT, info.isLandscape ? InterceptableLayout.LayoutParams.MATCH_PARENT : InterceptableLayout.LayoutParams.WRAP_CONTENT));
    panelTop.setLayoutParams(new InterceptableLayout.LayoutParams(InterceptableLayout.LayoutParams.MATCH_PARENT, InterceptableLayout.LayoutParams.WRAP_CONTENT));
    final int margin = (info.isLandscape ? UI.defaultControlSize : 0);
    if (UI.extraSpacing)
      panelTop.setPadding(UI._8dp + margin, UI._8dp, UI._8dp + margin, UI._8dp);
    else
      panelTop.setPadding(margin, 0, margin, 0);
    
    LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)btnPrev.getLayoutParams();
    //lp.rightMargin = (info.isLandscape ? 0 : UI._16dp);
    //lp.bottomMargin = (info.isLandscape ? UI._16dp : 0);
    lp.rightMargin = UI._16dp;
    lp.bottomMargin = 0;
    btnPrev.setLayoutParams(lp);
    btnPrev.setIcon(UI.ICON_PREV);
    
    lp = (LinearLayout.LayoutParams)btnPlay.getLayoutParams();
    //lp.rightMargin = (info.isLandscape ? 0 : UI._16dp);
    //lp.bottomMargin = (info.isLandscape ? UI._16dp : 0);
    lp.rightMargin = UI._16dp;
    lp.bottomMargin = 0;
    btnPlay.setLayoutParams(lp);
    btnPlay.setIcon((playing = Player.isPlaying()) ? UI.ICON_PAUSE : UI.ICON_PLAY);
    
    RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    //p.addRule(info.isLandscape ? RelativeLayout.ALIGN_PARENT_LEFT : RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
    p.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
    p.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
    panelSecondary.setLayoutParams(p);
    panelSecondary.setOrientation(LinearLayout.HORIZONTAL);
    
    p = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    //p.addRule(info.isLandscape ? RelativeLayout.ALIGN_PARENT_LEFT : RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
    p.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
    p.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
    btnMenu.setLayoutParams(p);
    btnMenu.setIcon(UI.ICON_MENU);
    
    if (visualizerView != null) {
      final InterceptableLayout.LayoutParams ip;
      if (visualizerViewFullscreen) {
        ip = new InterceptableLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
      } else {
        final Point pt = visualizerView.getDesiredSize(info.screenWidth, info.screenHeight);
        ip = new InterceptableLayout.LayoutParams(pt.x, pt.y);
        ip.gravity = Gravity.CENTER;
      }
      ((View)visualizerView).setLayoutParams(ip);
    }
    
    panelControls.requestLayout();
  }

  @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
  private void setScalingMode() {
    fxVisualizer.setScalingMode(android.media.audiofx.Visualizer.SCALING_MODE_AS_PLAYED);
    fxVisualizer.setScalingMode(android.media.audiofx.Visualizer.SCALING_MODE_NORMALIZED);
  }

  private boolean initFxVisualizer() {
    try {
      final int g = Player.getAudioSessionId();
      if (g < 0)
        return true;
      if (fxVisualizer != null) {
        if (fxVisualizerAudioSessionId == g) {
          try {
            fxVisualizer.setEnabled(true);
            return true;
          } catch (Throwable ex) {
          }
        }
        try {
          fxVisualizer.release();
        } catch (Throwable ex) {
          fxVisualizer = null;
        }
      }
      fxVisualizer = new android.media.audiofx.Visualizer(g);
      fxVisualizerAudioSessionId = g;
    } catch (Throwable ex) {
      fxVisualizerFailed = true;
      fxVisualizer = null;
      fxVisualizerAudioSessionId = -1;
      return false;
    }
    if (fxVisualizer != null) {
      try {
        fxVisualizer.setCaptureSize((visualizer == null) ? Visualizer.MAX_POINTS : visualizer.getDesiredPointCount());
        fxVisualizer.setEnabled(true);
      } catch (Throwable ex) {
        fxVisualizerFailed = true;
        fxVisualizer.release();
        fxVisualizer = null;
        fxVisualizerAudioSessionId = -1;
      }
    }
    if (fxVisualizer != null) {
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        try {
          setScalingMode();
        } catch (Throwable ex) {
        }
      }
      return true;
    }
    return false;
  }
  
  @SuppressLint("InlinedApi")
  @SuppressWarnings("deprecation")
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(null);
    
    buttonColor = new BgColorStateList(UI.colorState_text_visualizer_reactive.getDefaultColor(), UI.color_text_selected);
    lblColor = new BgColorStateList(UI.colorState_text_visualizer_reactive.getDefaultColor(), UI.colorState_text_visualizer_reactive.getDefaultColor());

    isWindowFocused = true;

    info = new UI.DisplayInfo();

    setRequestedOrientation((UI.visualizerOrientation == 0) ? ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE : ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    //whenever the activity is being displayed, the volume keys must control
    //the music volume and nothing else!
    setVolumeControlStream(AudioManager.STREAM_MUSIC);

    Player.addDestroyedObserver(this);

    String name = null;
    Class<?> clazz = null;
    final Intent si = getIntent();
    if (si != null && (name = si.getStringExtra(Visualizer.EXTRA_VISUALIZER_CLASS_NAME)) != null) {
      if (!name.startsWith("br.com.carlosrafaelgn.fplay"))
        name = null;
    }
    if (name != null) {
      try {
        clazz = Class.forName(name);
      } catch (Throwable ex) {
      }
    }
    if (clazz != null) {
      try {
        info.getInfo(this);
        visualizer = (Visualizer)clazz.getConstructor(Context.class, Activity.class, boolean.class, Intent.class).newInstance(getApplication(), this, info.isLandscape, si);
      } catch (Throwable ex) {
        clazz = null;
      }
    }
    visualizerRequiresScreen = (visualizer != null && visualizer.requiresScreen());

    getWindow().setBackgroundDrawable(new ColorDrawable(UI.color_visualizer565));
    //keep the screen always on while the visualizer is active
    if (visualizerRequiresScreen) {
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
        WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
        //WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR |
        WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
        WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN |
        WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS |
        WindowManager.LayoutParams.FLAG_FULLSCREEN);
      //getWindow().requestFeature(Window.FEATURE_NO_TITLE |
      //  Window.FEATURE_ACTION_MODE_OVERLAY);
    } else {
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
      //Apparently, Bluetooth stops transmitting when the screen is off :(
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
      //if (UI.keepScreenOn)
      //  getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
      //else
      //  getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
      prepareSystemUIObserver();
    
    setContentView(R.layout.activity_visualizer);
    
    panelControls = (InterceptableLayout)findViewById(R.id.panelControls);
    panelControls.setOnClickListener(this);
    panelControls.setInterceptedTouchEventListener(this);
    panelTop = (RelativeLayout)findViewById(R.id.panelTop);
    panelSecondary = (LinearLayout)findViewById(R.id.panelSecondary);
    btnGoBack = (BgButton)findViewById(R.id.btnGoBack);
    btnGoBack.setOnClickListener(this);
    btnGoBack.setIcon(UI.ICON_GOBACK);
    btnPrev = (BgButton)findViewById(R.id.btnPrev);
    btnPrev.setOnClickListener(this);
    btnPlay = (BgButton)findViewById(R.id.btnPlay);
    btnPlay.setOnClickListener(this);
    btnNext = (BgButton)findViewById(R.id.btnNext);
    btnNext.setOnClickListener(this);
    btnNext.setIcon(UI.ICON_NEXT);
    btnMenu = (BgButton)findViewById(R.id.btnMenu);
    btnMenu.setOnClickListener(this);
    lblTitle = (TextView)findViewById(R.id.lblTitle);
    UI.mediumText(lblTitle);
    final Song currentSong = Player.getCurrentSong();
    lblTitle.setText((currentSong == null) ? getText(R.string.nothing_playing) : currentSong.title);

    //if (UI.extraSpacing)
    //  panelTop.setPadding(UI._8dp, UI._8dp, UI._8dp, UI._8dp);

    if (visualizer != null) {
      visualizerView = visualizer.getView();
      visualizerViewFullscreen = visualizerView.isFullscreen();
      if (visualizerView != null) {
        ((View)visualizerView).setOnClickListener(this);
        panelControls.addView((View)visualizerView);
        panelTop.bringToFront();
      }
    }
    
    prepareViews(true);

    if (visualizerRequiresScreen) {
      panelTopBackground = new ColorDrawable(UI.color_visualizer565);
      panelTopBackground.setAlpha(255 >> 1);
      panelTop.setBackgroundDrawable(panelTopBackground);
    }
    btnGoBack.setTextColor(buttonColor);
    btnPrev.setTextColor(buttonColor);
    btnPlay.setTextColor(buttonColor);
    btnNext.setTextColor(buttonColor);
    btnMenu.setTextColor(buttonColor);
    lblTitle.setTextColor(lblColor);
    
    if (!btnGoBack.isInTouchMode())
      btnGoBack.requestFocus();
    
    alive = true;
    reset = true;
    paused = false;
    visualizerReady = false;
    fxVisualizerFailed = false;
    fxVisualizerAudioSessionId = -1;
    timer = new Timer(new Runnable() {
      private int lastTime = 0;
      @Override
      public void run() {
        if (alive) {
          if (paused) {
            try {
              if (fxVisualizer != null)
                fxVisualizer.setEnabled(false);
            } catch (Throwable ex) {
            }
            if (timer != null)
              timer.pause();
            return;
          }
          if (reset || fxVisualizer == null) {
            reset = false;
            if (!initFxVisualizer()) {
              MainHandler.postToMainThread(ActivityVisualizer.this);
              return;
            }
            if (!visualizerReady && alive && visualizer != null) {
              visualizer.load(getApplication());
              visualizerReady = true;
            }
          }
          if (fxVisualizer != null && visualizer != null) {
            final int now = (int)SystemClock.uptimeMillis();
            final int deltaMillis = (int)(now - lastTime);
            lastTime = now;
            visualizer.processFrame(fxVisualizer, playing, ((deltaMillis >= 100) || (deltaMillis <= 0)) ? 100 : deltaMillis);
          }
        }
        if (!alive) {
          if (timer != null) {
            timer.stop();
            timer.release();
            timer = null;
          }
          if (visualizer != null) {
            visualizer.release();
            visualizer = null;
          }
          if (fxVisualizer != null) {
            try {
              fxVisualizer.setEnabled(false);
            } catch (Throwable ex) {
            }
            try {
              fxVisualizer.release();
            } catch (Throwable ex) {
            }
            fxVisualizer = null;
          }
          MainHandler.postToMainThread(ActivityVisualizer.this);
          System.gc();
        }
      }
    }, "Visualizer Thread", false, false, true);
    timer.start(16);
    uiAnimTimer = (visualizerRequiresScreen ? new Timer((Timer.TimerHandler)this, "UI Anim Timer", false, true, false) : null);
    
    hideAllUIDelayed();
  }
  
  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.clear();
  }
  
  @Override
  public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    if (info == null)
      return;
    final boolean i = info.isLandscape;
    final int w = info.usableScreenWidth, h = info.usableScreenHeight;
    info.getInfo(this);
    if (i != info.isLandscape || w != info.usableScreenWidth || h != info.usableScreenHeight) {
      final Visualizer v = visualizer;
      if (v != null)
        v.configurationChanged(info.isLandscape);
      prepareViews(false);
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
        prepareSystemUIObserver();
      hideAllUIDelayed();
      System.gc();
    }
  }
  
  private void resumeTimer() {
    //I decided to keep the visualizer paused only when the Activity is paused...
    //in all other cases, let the visualizer run free! :)
    //this behavior is specially useful for more complex visualizations
    paused = false;
    if (timer != null)
      timer.resume();
    //paused = !Player.isPlaying();
    //if (!paused && timer != null)
    //  timer.resume();
  }
  
  @Override
  protected void onPause() {
    Player.observer = null;
    paused = true;
    Player.setAppIdle(true);
    super.onPause();
  }
  
  @Override
  protected void onResume() {
    Player.setAppIdle(false);
    Player.observer = this;
    reset = true;
    resumeTimer();
    onPlayerChanged(Player.getCurrentSong(), true, null);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
      prepareSystemUIObserver();
    super.onResume();
  }
  
  private void finalCleanup() {
    Player.removeDestroyedObserver(this);
    alive = false;
    final Visualizer v = visualizer;
    if (v != null)
      v.cancelLoading();
    resumeTimer();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
      cleanupSystemUIObserver();
    if (uiAnimTimer != null)
      uiAnimTimer.stop();
    info = null;
    panelControls = null;
    panelTop = null;
    panelSecondary = null;
    btnGoBack = null;
    btnPrev = null;
    btnPlay = null;
    btnNext = null;
    btnMenu = null;
    uiAnimTimer = null;
  }
  
  @Override
  protected void onDestroy() {
    finalCleanup();
    super.onDestroy();
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    final Visualizer v = visualizer;
    if (v != null)
      v.onActivityResult(requestCode, resultCode, data);
  }

  @Override
  public void run() {
    if (fxVisualizerFailed) {
      fxVisualizerFailed = false;
      UI.toast(getApplication(), R.string.visualizer_not_supported);
    }
    //perform the final cleanup
    if (!alive && visualizerView != null) {
      visualizerView.releaseView();
      visualizerView = null;
    }
  }
  
  @Override
  public void onPlayerChanged(Song currentSong, boolean songHasChanged, Throwable ex) {
    if (!songHasChanged)
      reset = true;
    resumeTimer();
    playing = Player.isPlaying();
    if (btnPlay != null) {
      btnPlay.setText(playing ? UI.ICON_PAUSE : UI.ICON_PLAY);
      btnPlay.setContentDescription(getText(playing ? R.string.pause : R.string.play));
    }
    if (songHasChanged && lblTitle != null)
      lblTitle.setText((currentSong == null) ? getText(R.string.nothing_playing) : currentSong.title);
    final Visualizer v = visualizer;
    if (v != null)
      v.onPlayerChanged(currentSong, songHasChanged, ex);
  }
  
  @Override
  public void onPlayerControlModeChanged(boolean controlMode) {
  }
  
  @Override
  public void onPlayerGlobalVolumeChanged() {
  }
  
  @Override
  public void onPlayerAudioSinkChanged(int audioSink) {
    reset = true;
    resumeTimer();
  }
  
  @Override
  public void onPlayerMediaButtonPrevious() {
  }
  
  @Override
  public void onPlayerMediaButtonNext() {
  }
  
  @Override
  public void onPlayerDestroyed() {
    finalCleanup();
    finish();
  }
  
  @Override
  public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo menuInfo) {
    if (info == null)
      return;
    UI.prepare(menu);
    menu.add(0, MNU_ORIENTATION, 0, (UI.visualizerOrientation == 0) ? R.string.portrait : R.string.landscape)
      .setOnMenuItemClickListener(this)
      .setIcon(new TextIconDrawable(UI.ICON_ORIENTATION));
    final Visualizer v = visualizer;
    if (v != null)
      v.onCreateContextMenu(menu);
  }
  
  @Override
  public boolean onMenuItemClick(MenuItem item) {
    if (info == null)
      return true;
    switch (item.getItemId()) {
    case MNU_ORIENTATION:
      UI.visualizerOrientation = ((UI.visualizerOrientation == 0) ? 1 : 0);
      setRequestedOrientation((UI.visualizerOrientation == 0) ? ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE : ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
      break;
    }
    return true;
  }
  
  @Override
  public void onClick(View view) {
    if (view == btnGoBack) {
      finish();
    } else if (view == btnPrev) {
      Player.previous();
      reset = true;
      resumeTimer();
    } else if (view == btnPlay) {
      Player.playPause();
    } else if (view == btnNext) {
      Player.next();
      reset = true;
      resumeTimer();
    } else if (view == btnMenu) {
      onPrepareOptionsMenu(null);
    } else if (view == visualizerView || view == panelControls) {
      final Visualizer v = visualizer;
      if (v != null && panelTopWasVisibleOk)
        v.onClick();
    }
  }
  
  @Override
  public void onWindowFocusChanged(boolean hasFocus) {
    if ((isWindowFocused = hasFocus))
      hideAllUIDelayed();
    super.onWindowFocusChanged(hasFocus);
  }
  
  @Override
  public boolean onTouch(View v, MotionEvent event) {
    switch (event.getActionMasked()) {
    case MotionEvent.ACTION_DOWN:
    case MotionEvent.ACTION_POINTER_DOWN:
      if (panelTop != null && !(panelTopWasVisibleOk = (panelTopHiding == 0 && panelTop.getVisibility() == View.VISIBLE)))
        showPanelTop(true);
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
        showSystemUI();
      hideAllUIDelayed();
      break;
    }
    return false;
  }
  
  @Override
  public boolean handleMessage(Message msg) {
    switch (msg.what) {
    case MSG_HIDE:
      if (msg.arg1 != version || !isWindowFocused)
        break;
      showPanelTop(false);
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
        hideSystemUI();
      break;
    case MSG_SYSTEM_UI_CHANGED:
      final boolean show = (msg.arg1 == 0);
      showPanelTop(show);
      if (show)
        hideAllUIDelayed();
      break;
    }
    return true;
  }
  
  private void showPanelTop(boolean show) {
    if (panelTop == null || uiAnimTimer == null)
      return;
    if (show) {
      if (panelTop.getVisibility() != View.VISIBLE)
        panelTop.setVisibility(View.VISIBLE);
      panelTopHiding = 1;
      if (!uiAnimTimer.isAlive()) {
        panelTopLastTime = (int)SystemClock.uptimeMillis();
        uiAnimTimer.start(16);
      }
    } else {
      if (panelTop.getVisibility() == View.GONE)
        return;
      panelTopHiding = -1;
      if (!uiAnimTimer.isAlive()) {
        panelTopLastTime = (int)SystemClock.uptimeMillis();
        uiAnimTimer.start(16);
      }
    }
  }
  
  @Override
  public void handleTimer(Timer timer, Object param) {
    if (panelTop == null || uiAnimTimer == null || info == null)
      return;
    final int now = (int)SystemClock.uptimeMillis();
    final float delta = (float)(now - panelTopLastTime) * 0.001953125f;
    panelTopLastTime = now;
    if (panelTopHiding < 0) {
      panelTopAlpha -= delta;
      if (panelTopAlpha <= 0.0f) {
        panelTopHiding = 0;
        panelTopAlpha = 0.0f;
        uiAnimTimer.stop();
        panelTop.setVisibility(View.GONE);
      }
    } else {
      panelTopAlpha += delta;
      if (panelTopAlpha >= 1.0f) {
        panelTopHiding = 0;
        panelTopAlpha = 1.0f;
        uiAnimTimer.stop();
      }
    }
    
    if (panelTopAlpha != 0.0f) {
      final int c = (int)(255.0f * panelTopAlpha);
      if (panelTopBackground != null)
        panelTopBackground.setAlpha(c >> 1);
      buttonColor.setNormalColorAlpha(c);
      lblColor.setNormalColorAlpha(c);
      if (btnGoBack != null)
        btnGoBack.setTextColor(buttonColor);
      if (btnPrev != null)
        btnPrev.setTextColor(buttonColor);
      if (btnPlay != null)
        btnPlay.setTextColor(buttonColor);
      if (btnNext != null)
        btnNext.setTextColor(buttonColor);
      if (btnMenu != null)
        btnMenu.setTextColor(buttonColor);
      if (lblTitle != null)
        lblTitle.setTextColor(lblColor);
    }
  }
}
Java Source Code List
