仿雷达搜索

来源：互联网发布：mac总是提示安装迅雷编辑：程序博客网时间：2024/04/29 01:43

网上下载了几张图片，做了个demo

资源下载：http://download.csdn.net/detail/hello_12413/8601533

别的不说了，直接上图上代码

代码如下：

package com.example.actionbaraddui;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.Point;import android.graphics.RectF;import android.os.Handler;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;/** * @project javaapk.com-ActionBarAddUI * @ClassName ScanView.java * @Description 搜索页面，模仿雷达 背景不动，指针转动 * @author xugang * @date 2015-4-9 下午5:04:08 */public class ScanView extends View implements Runnable {/** 转盘 */private Bitmap plate;/** 指针 */private Bitmap pointer;private Bitmap btn;private float Angel = 0.0f;private Matrix matx = new Matrix();private boolean isStopRoter = false;private Point mPoint;public ScanView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);new Thread(this).start();}public ScanView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public ScanView(Context context) {this(context, null);}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);init();canvas.restore();Paint paintPlate = new Paint();canvas.drawBitmap(plate, (canvas.getWidth() - plate.getWidth()) / 2, (canvas.getHeight() - plate.getHeight()) / 2, paintPlate);matx.reset();matx.setTranslate(canvas.getWidth() / 2 - pointer.getWidth(), canvas.getHeight() / 2);matx.postRotate(Angel, canvas.getWidth() / 2, canvas.getHeight() / 2);Paint paintPointer = new Paint();canvas.drawBitmap(pointer, matx, paintPointer);Paint paintBtn = new Paint();canvas.drawBitmap(btn, (canvas.getWidth() - btn.getWidth()) / 2, (canvas.getHeight() - btn.getHeight()) / 2, paintBtn);mPoint = new Point(canvas.getWidth() / 2, canvas.getHeight() / 2);}private void init() {if (plate == null)plate = Bitmap.createBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.gplus_search_bg));if (btn == null)btn = Bitmap.createBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.locus_round_click));if (pointer == null)pointer = Bitmap.createBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.gplus_search_args));}Handler handler = new Handler() {public void handleMessage(android.os.Message msg) {invalidate();};};@Overridepublic 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);}//判断是否点击了中间点private void handleActionDownEvenet(MotionEvent event) {int x = (int) event.getX();int y = (int) event.getY();RectF rectF = new RectF(getWidth() / 2 - btn.getWidth() / 2, getHeight() / 2 - btn.getHeight() / 2, getWidth() / 2 + btn.getWidth() / 2, getHeight() / 2 + btn.getHeight() / 2);if (rectF.contains(event.getX(), event.getY())) {isStopRoter = !isStopRoter;}}@Overridepublic void run() {while (true) {try {Thread.sleep(40);} catch (InterruptedException e) {e.printStackTrace();}if (isStopRoter) {Angel += 5;handler.sendEmptyMessage(1);}}}}

遗留问题：1、大小不能随意变化，这个还需要研究研究。

2、用的是矩阵变化，这里有个前乘和后乘的问题

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