Android中评分RationBar控件怎么用
这篇文章主要介绍了Android中评分RationBar控件怎么用，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
具体内容如下
用ViewGroup包起来感觉会写很多View，于是我决定使用之定义控件，直接上代码
/** * 评论专用星星 * <p> * 宽高都不能用wrap_content 必须使用固定值或者match_parent * <p> * MIXED : 在控件的宽度范围内等分星星 * <p> * SCROLL:根据 星星的宽度和每个星星之间的间距画星星 */public class SuperRationBar extends View implements View.OnTouchListener { final public static int MIXED = 0; final public static int SCROLL = 1; //不传默认为 MIXED private int mode = MIXED; // 需要建立多少星星 不传 默认为5 private int number = 5; // 单个星星的宽度 这里宽度和高度相等 必传 private int startWidth = 50; // 每个星星之间的间距 默认20 (mode == MIXED 用不到) private int startPadding = 10; //是否已经初始化试图 private boolean isInit = false; //被选中的个数 private int selectNumber = 0; //选中的样式 private Bitmap bmSel; //未选中的样式 private Bitmap bmNol; //记录每个星星的位置 用 , 分割 private List<String> pointList; // 画笔 private Paint mPaint; public SuperRationBar(Context context, AttributeSet attrs) { super(context, attrs); init(context, attrs); init(context); } private void init(Context context) { mPaint = new Paint(); setOnTouchListener(this); } private void init(Context context, AttributeSet attrs) { TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SuperRationBar); mode = a.getInteger(R.styleable.SuperRationBar_mode, MIXED); number = a.getInteger(R.styleable.SuperRationBar_SuperRationBar_number, 5); startWidth = (int) a.getDimension(R.styleable.SuperRationBar_SuperRationBar_startWidth, 50); startPadding = (int) a.getDimension(R.styleable.SuperRationBar_SuperRationBar_startPadding, 10); a.recycle(); } @Override public void draw(Canvas canvas) { super.draw(canvas); if (!isInit) { return; } {//记录每个星星的位置 用 , 分割 pointList = new ArrayList<>(); } if (mode == MIXED) { //单个星星的宽度 int itemWidth = getWidth() / number; //根据每个星星之间的间距画星星 for (int i = 0; i < number; i++) { int left = i == 0 ? 0 : itemWidth * i; int height = getHeight(); int bmHeight = bmSel.getHeight(); int top = (getHeight() - startWidth) / 2; pointList.add(left + "," + top + "," + (left + itemWidth) + "," + (top + itemWidth)); if (i < selectNumber) { canvas.drawBitmap(bmSel, left, top, mPaint); } else { canvas.drawBitmap(bmNol, left, top, mPaint); } } } else if (mode == SCROLL) { int totalWidth = (startWidth + startPadding) * (number - 1) + startWidth; //单个星星的宽度 int itemWidth = totalWidth / number; //根据每个星星之间的间距画星星 for (int i = 0; i < number; i++) { int left = i == 0 ? 0 : itemWidth * i; int top = (getHeight() - startWidth) / 2; pointList.add(left + "," + top + "," + (left + itemWidth) + "," + (top + itemWidth)); if (i < selectNumber) { canvas.drawBitmap(bmSel, left, top, mPaint); } else { canvas.drawBitmap(bmNol, left, top, mPaint); } } } } @Override protected void onFinishInflate() { super.onFinishInflate(); isInit = true; } /** * 设置三种图片样式的id * * @param selId * @param nolId */ public SuperRationBar setImageResIds(int selId, int nolId) { bmSel = BitmapFactory.decodeResource(getResources(), selId); bmNol = BitmapFactory.decodeResource(getResources(), nolId); bmSel = zoomBitmap(bmSel, startWidth); bmNol = zoomBitmap(bmNol, startWidth); return this; } /** * 调用这个方法刷新页面 */ public void launcher() { if (isInit) { postInvalidate(); } else { post(new Runnable() { @Override public void run() { postInvalidate(); } }); } } @Override public boolean onTouch(View v, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_MOVE) { if (pointList != null) { int num = contain((int) event.getX(), (int) event.getY()); if (num != -1) { selectNumber = num + 1; } postInvalidate(); } if (event.getAction() == MotionEvent.ACTION_DOWN) { return true; } } return false; } /** * 判断点击的位置是不是在星星上边 并返回星星的下标 错误 返回-1 * * @param x * @param y * @return */ private int contain(int x, int y) { int size = pointList.size(); for (int i = 0; i < size; i++) { String[] pointArray = pointList.get(i).split(","); int rl = Integer.parseInt(pointArray[0]); int rt = Integer.parseInt(pointArray[1]); int rr = Integer.parseInt(pointArray[2]); int rb = Integer.parseInt(pointArray[3]); if (x > rl && x < rr) { //在范围内 返回下标 return i; } } return -1; } public int getSelectNumber() { return selectNumber; } /** * 等比例缩放bitmap图片 * * @param bitmap * @param reqWidth * @return */ public Bitmap zoomBitmap(Bitmap bitmap, float reqWidth) { if (bitmap == null) { return null; } final int width = bitmap.getWidth(); Matrix matrix = new Matrix(); float scale = reqWidth / width; matrix.setScale(scale, scale); bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); return bitmap; }}
<declare-styleable name="SuperRationBar"> <attr name="SuperRationBar_number" format="integer" /> <attr name="SuperRationBar_startWidth" format="dimension" /> <attr name="SuperRationBar_startPadding" format="dimension" /> <attr name="mode"> <enum name="fixed" value="0" /> <enum name="scroll" value="1" /> </attr> </declare-styleable>
注释得还是挺详细的 这里直接上使用代码
<com.xxx.widget.SuperRationBar android:id="@+id/RationBar0" android:layout_width="match_parent" android:layout_height="50dp" android:layout_marginLeft="50dp" android:layout_marginTop="10dp" android:layout_marginRight="50dp" android:background="@color/colorAccent" app:SuperRationBar_number="6" app:SuperRationBar_startPadding="10dp" app:SuperRationBar_startWidth="40dp" app:mode="fixed" />
SuperRationBar_startWidth 这个为必传 而且只能在布局里面传 RationBar0.setImageResIds(R.mipmap.img_ration_bar_sel, R.mipmap.img_ration_bar_nol) .launcher();
使用就这么一句 调用
int number0 = RationBar0.getSelectNumber();
可以获取到当前的评分是多少
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