Android仿网易云音乐播放界面

public class MainActivity extends Activity { 
private RelativeLayout playDisc; 
private MusicPlayDiscView musicPlayDiscView; 
//播放按钮 
private ImageView playMusic; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 

playDisc = (RelativeLayout) findViewById(R.id.play_disc); 
//加载光盘view 
musicPlayDiscView = new MusicPlayDiscView(this); 
playDisc.addView(musicPlayDiscView); 

playMusic = (ImageView) findViewById(R.id.music_paly_pause); 
//监听方法 
playMusic.setOnClickListener(new OnClickListener() { 

@Override 
public void onClick(View v) { 
switch (Constant.CurrentState) { 
case Constant.Pause: 
Constant.CurrentState = Constant.Play; 
playMusic.setBackgroundResource(R.drawable.play_btn_pause); 
break; 
case Constant.Play: 
Constant.CurrentState = Constant.Pause; 
playMusic.setBackgroundResource(R.drawable.play_btn_play); 
break; 

} 

} 
}); 
} 

}

public class MusicPlayDiscView extends View { 
 
 Paint paint; 
 
 private Handler handler; 
 // 光盘图片 
 Bitmap bitmapDisc = BitmapFactory.decodeResource(getResources(), 
   R.drawable.play_disc); 
 // 专辑图片 
 Bitmap bitmapImage = BitmapFactory.decodeResource(getResources(), 
   R.drawable.music_play_people); 
 Bitmap bitmapCircularAblum, bitmapDiscCircular; 
 // 光盘指针图片 
 Bitmap bitmapNeedle = BitmapFactory.decodeResource(getResources(), 
   R.drawable.play_needle); 
 
 public MusicPlayDiscView(Context context) { 
  super(context); 
  //分别获得光盘和专辑的圆形图片 
  bitmapCircularAblum = getCircularBitmap(bitmapImage, 400); 
  bitmapDiscCircular = getCircularBitmap(bitmapDisc, 
    bitmapDisc.getWidth()); 
 
  paint = new Paint(); 
  handler = new Handler(); 
  handler.post(runnable); 
 } 
 
 /** 
  * 利用线程不断更新界面 
  */ 
 private Runnable runnable = new Runnable() { 
  public void run() { 
   postInvalidate(); 
   handler.postDelayed(runnable, 50); 
  } 
 }; 
 
 //状态标志： 
 int before = 0; 
 //角度标志 
 private int degreeFlag = 0; 
 
 @Override 
 protected void onDraw(Canvas canvas) { 
  super.onDraw(canvas); 
 
  /** 
   * 先画光盘与专辑图片 
   */ 
 
  if (Constant.CurrentState == Constant.Play) { 
   Constant.Degree++; 
   if (Constant.Degree > 360) 
    Constant.Degree = 0; 
 
   degreeFlag = Constant.Degree; 
 
   canvas.save(); 
   //360为屏幕的中间位置，手机是720的宽度 
   canvas.rotate(Constant.Degree, 360, 
     170 + bitmapDiscCircular.getHeight() / 2); 
   canvas.drawBitmap(bitmapCircularAblum, 
     360 - bitmapCircularAblum.getWidth() / 2, 200, paint); 
 
   canvas.drawBitmap(bitmapDisc, 
     360 - bitmapDiscCircular.getWidth() / 2, 170, paint); 
    
   canvas.restore(); 
 
  } else { 
   //before = 0; 
 
   canvas.save(); 
   canvas.rotate(degreeFlag, 360, 
     170 + bitmapDiscCircular.getHeight() / 2); 
   canvas.drawBitmap(bitmapCircularAblum, 
     360 - bitmapCircularAblum.getWidth() / 2, 200, paint); 
 
   canvas.drawBitmap(bitmapDisc, 
     360 - bitmapDiscCircular.getWidth() / 2, 170, paint); 
   canvas.restore(); 
 
  } 
 
  /** 
   * 再画光盘指针图片,三张图不能同时画 
   */ 
  if (Constant.CurrentState == Constant.Play ) { 
   canvas.drawBitmap(bitmapNeedle, 360 - bitmapNeedle.getWidth() / 2, 
     0, paint); 
 
  } else { 
   canvas.save(); 
   Matrix matrix = new Matrix(); 
   matrix.postRotate(-45); 
   paint.setAntiAlias(true); 
   //获得指针旋转后的图片 
   Bitmap bm = Bitmap.createBitmap(bitmapNeedle, 0, 0, 
     bitmapNeedle.getWidth(), bitmapNeedle.getHeight(), matrix, 
     true); 
   canvas.drawBitmap(bm, 360 - bitmapNeedle.getWidth() / 2 + 5, -60, 
     paint); 
    
    
   canvas.restore(); 
  } 
 
 } 
 
 /** 
  * 获得圆形图片的方法 
  * 
  */ 
 private Bitmap getCircularBitmap(Bitmap bitmap, int radius) { 
  Bitmap sbmp = Bitmap.createScaledBitmap(bitmap, radius, radius, false); 
 
  Bitmap output = Bitmap.createBitmap(sbmp.getWidth(), sbmp.getHeight(), 
    Config.ARGB_8888); 
  Canvas canvas = new Canvas(output); 
 
  Paint paint = new Paint(); 
  Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight()); 
 
  paint.setAntiAlias(true); 
  paint.setFilterBitmap(true); 
  paint.setDither(true); 
  canvas.drawARGB(0, 0, 0, 0); 
  paint.setColor(Color.BLACK); 
  canvas.drawCircle(sbmp.getWidth() / 2, sbmp.getHeight() / 2, 
    sbmp.getWidth() / 2, paint); 
  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); 
  canvas.drawBitmap(sbmp, rect, rect, paint); 
  return output; 
 } 
 
}