【Android】【自定义View】实现搜索放大镜旋转view

直接上代码吧：

public class SycleSearchView extends View implements  Runnable{
	private int width=200,height=200; //画布宽高
	private int srcId;
	private Bitmap src=null;
	private Context context;
	private int left=0,top=0;
	private int step=4;	//5
	private boolean positive;
	private Thread thread;
	private boolean canStart=true;
	private int iw,ih;//图片的宽高
	
	public SycleSearchView(Context context, AttributeSet attrs) {
		super(context, attrs);
		// TODO Auto-generated constructor stub
		this.context=context;
	}


	public SycleSearchView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		// TODO Auto-generated constructor stub
		this.context=context;
	}


	private void init(){
		left=0;
		top=height/2;
	}

	/**
	* 
	* 方法: initXY 
	* 描述: TODO
	* 参数: @param x
	* 参数: @param positive true 表示向右运动
	* 返回: void
	* 异常
	*/
	private void initXY(int x){
		left=x;
		top=height/2-(int) Math.sqrt(height*height/4-(width/2-x)*(width/2-x));
		if(!positive)
		{
			top=height-top;
		}
	}

	public void setSize(int width,int height){
		this.width=width;
		this.height=height;
	}

	public void setImgRes(int id){
		this.srcId=id;
		src=BitmapFactory.decodeResource(context.getResources(), srcId);
		iw=src.getWidth();
		ih=src.getHeight();
	}

	
	@Override
	protected void onDraw(Canvas canvas) {
		// TODO Auto-generated method stub
		super.onDraw(canvas);
		if(src==null){
			return;
		}
		canvas.drawBitmap(src, left, top, null);
	}


	public void startsycle(){
		canStart=true;
		Thread localThread = new Thread(this);
		this.thread = localThread;
		this.thread.start();
	}

	public void stopsycle(){
		canStart=false;
		if(this.thread!=null){
			this.thread.interrupt();
		}
	}


	@Override
	public void run() {
		// TODO Auto-generated method stub
		while(canStart){
			if(positive){
				if(left+step<width){
					initXY(left+step);
				}else{
					positive=!positive;
					initXY(left-step);
				}
			}else{
				if(left-step>0){
					initXY(left-step);
				}else{
					positive=!positive;
					initXY(left+step);
				}
			}

			postInvalidate();

			try {
				Thread.sleep(200);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
}

调用方法：

Boolean test_start = false;

private Button.OnClickListener clickImageButton_imageButton_search = new Button.OnClickListener()
{
	public void onClick(View v)
	{
		System.out.println("------clickImageButton_imageButton_search--------");
			
		test_start = !test_start;
		if(test_start){
			imageButton_magnifier.startsycle();
		}
		else{
			imageButton_magnifier.stopsycle();
		}			
	}
};