android 雷达UI

public class BaseView extends RelativeLayout{
	
	public Context context;
	
	public BaseView(Context context) {
		super(context);
		this.context = context;
	}
	
	public BaseView(Context context, AttributeSet attrs) {
		super(context, attrs);
		this.context = context;
	}

	public BaseView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		this.context = context;
	}

	
	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
	}
}

public class SearchDevicesView extends BaseView{
	
	public static final String TAG = "SearchDevicesView";
	public static final boolean D  = BuildConfig.DEBUG; 
	
	@SuppressWarnings("unused")
	private long TIME_DIFF = 1500;
	
	int[] lineColor = new int[]{0x7B, 0x7B, 0x7B};
	int[] innerCircle0 = new int[]{0xb9, 0xff, 0xFF};
	int[] innerCircle1 = new int[]{0xdf, 0xff, 0xFF};
	int[] innerCircle2 = new int[]{0xec, 0xff, 0xFF};
	
	int[] argColor = new int[]{0xF3, 0xf3, 0xfa};
	
	private float offsetArgs = 0;
	private boolean isSearching = false;
	private Bitmap bitmap;
	private Bitmap bitmap1;
	private Bitmap bitmap2;
	
	public boolean isSearching() {
		return isSearching;
	}

	public void setSearching(boolean isSearching) {
		this.isSearching = isSearching;
		offsetArgs = 0;
		invalidate();
	}

	public SearchDevicesView(Context context) {
		super(context);
		initBitmap();
	}
	
	public SearchDevicesView(Context context, AttributeSet attrs) {
		super(context, attrs);
		initBitmap();
	}

	public SearchDevicesView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		initBitmap();
	}
	
	private void initBitmap(){
		if(bitmap == null){
			bitmap = Bitmap.createBitmap(BitmapFactory.decodeResource(context.getResources(), R.drawable.gplus_search_bg));
		}
		if(bitmap1 == null){
			bitmap1 = Bitmap.createBitmap(BitmapFactory.decodeResource(context.getResources(), R.drawable.locus_round_click));
		}
		if(bitmap2 == null){
			bitmap2 = Bitmap.createBitmap(BitmapFactory.decodeResource(context.getResources(), R.drawable.gplus_search_args));
		}
	}

	@SuppressLint("DrawAllocation")
	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);	
		canvas.drawBitmap(bitmap, getWidth() / 2 - bitmap.getWidth() / 2, getHeight() / 2 - bitmap.getHeight() / 2, null);
		
		if(isSearching){
			
			Rect rMoon = new Rect(getWidth()/2-bitmap2.getWidth(),getHeight()/2,getWidth()/2,getHeight()/2+bitmap2.getHeight()); 
			canvas.rotate(offsetArgs,getWidth()/2,getHeight()/2);
			canvas.drawBitmap(bitmap2,null,rMoon,null);
			offsetArgs = offsetArgs + 3;
		}else{
			
			canvas.drawBitmap(bitmap2,  getWidth() / 2  - bitmap2.getWidth() , getHeight() / 2, null);
		}
		
		canvas.drawBitmap(bitmap1,  getWidth() / 2 - bitmap1.getWidth() / 2, getHeight() / 2 - bitmap1.getHeight() / 2, null);
		
		if(isSearching) invalidate();
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {	
		switch (event.getAction()) {
		case MotionEvent.ACTION_DOWN:		
			handleActionDownEvenet(event);
			return true;
		case MotionEvent.ACTION_MOVE: 
			return true;
		case MotionEvent.ACTION_UP:
			return true;
		}
		return super.onTouchEvent(event);
	}
	
	private void handleActionDownEvenet(MotionEvent event){
		RectF rectF = new RectF(getWidth() / 2 - bitmap1.getWidth() / 2, 
								getHeight() / 2 - bitmap1.getHeight() / 2, 
								getWidth() / 2 + bitmap1.getWidth() / 2, 
								getHeight() / 2 + bitmap1.getHeight() / 2);
		
		if(rectF.contains(event.getX(), event.getY())){
			if(D) Log.d(TAG, "click search device button");
			if(!isSearching()) {
				setSearching(true);
			}else{
				setSearching(false);
			}
		}
	}
}