public class ChinaMapView extends View {
private int[] colorArray = new int[]{0xFF239BD7, 0xFF30A9E5, 0xFF80CBF1, 0xFFFFFFFF};//各省地图显示的颜色
private Context context;//上下文 private List<ProviceItem> itemList;//各省地图列表 各省地图颜色 与路径 private Paint paint; //初始化画笔 private ProviceItem select; //选中的省份 private RectF totalRect;//中国地图的矩形范围 private float scale = 1.0f;//中国地图的缩放比例public ChinaMapView(Context context, AttributeSet attrs) {
super(context, attrs); init(context); } public ChinaMapView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); }private void init(Context context) {
this.context = context; paint = new Paint(); paint.setAntiAlias(true); itemList = new ArrayList<>(); loadThread.start();}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { //获取当前控件的高度 让地图宽高适配当前控件 int width = MeasureSpec.getSize(widthMeasureSpec); int height = MeasureSpec.getSize(heightMeasureSpec); if (totalRect != null) { double mapWidth = totalRect.width(); scale = (float) (width / mapWidth); //获取控件高度为了让地图能缩放到和控件宽高适配 } setMeasuredDimension(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)); }//加载中国地图的路径相对比较耗时，这里开启子线程来加载 private Thread loadThread = new Thread() { @Override public void run() { final InputStream inputStream = context.getResources().openRawResource(R.raw.china);//读取地图svg DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); //获取DocumentBuilderFactory实例 DocumentBuilder builder = null; try { builder = factory.newDocumentBuilder(); Document doc = builder.parse(inputStream);//解析svg的输入流 Element rootElement = doc.getDocumentElement(); NodeList items = rootElement.getElementsByTagName("path"); //获取地图的整个上下左右位置， float left = -1; float right = -1; float top = -1; float bottom = -1; List<ProviceItem> list = new ArrayList<>(); for (int i = 0; i < items.getLength(); i++) { Element element = (Element) items.item(i); String pathData = element.getAttribute("android:pathData"); @SuppressLint("RestrictedApi") Path path = PathParser.createPathFromPathData(pathData); ProviceItem proviceItem = new ProviceItem(path);//设置路径 proviceItem.setDrawColor(colorArray[i % 4]);//设置颜色 //取每个省的上下左右 最后拿出最小或者最大的来充当 总地图的上下左右 RectF rect = new RectF(); path.computeBounds(rect, true); left = left == -1 ? rect.left : Math.min(left, rect.left); right = right == -1 ? rect.right : Math.max(right, rect.right); top = top == -1 ? rect.top : Math.min(top, rect.top); bottom = bottom == -1 ? rect.bottom : Math.max(bottom, rect.bottom); list.add(proviceItem); } itemList = list; totalRect = new RectF(left, top, right, bottom);//设置地图的上下左右位置//加载完以后刷新界面
Handler handler = new Handler(Looper.getMainLooper()); handler.post(new Runnable() { @Override public void run() { requestLayout(); invalidate(); } }); } catch (Exception e) { e.printStackTrace(); } } };@Override
public boolean onTouchEvent(MotionEvent event) { handleTouch(event.getX() / scale, event.getY() / scale); return super.onTouchEvent(event); }private void handleTouch(float x, float y) {
if (itemList == null){ return; } ProviceItem selectItem = null; for (ProviceItem proviceItem : itemList){ if (proviceItem.isTouch(x,y)){ selectItem = proviceItem; } } if (selectItem != null){ select = selectItem; postInvalidate(); } }@Override
protected void onDraw(Canvas canvas) { super.onDraw(canvas); if (itemList != null){ canvas.save(); canvas.scale(scale,scale);//把画布缩放匹配到本控件的宽高 for (ProviceItem proviceItem : itemList){ if (proviceItem != select){ proviceItem.drawItem(canvas,paint,false); }else { proviceItem.drawItem(canvas,paint,true); } } } }}---------------------