一款基于Android的矿井安全检测系统.zip

package hdd.com.meikuang.fengji; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; import android.support.annotation.Nullable; import android.util.AttributeSet; import android.view.View; import hdd.com.meikuang.R; public class CircleProgressView extends View { private int mCurrent;//当前进度 private Paint mPaintOut; private Paint mPaintCurrent; private Paint mPaintText; private float mPaintWidth;//画笔宽度 private int mPaintColor = Color.RED;//画笔颜色 private int mTextColor = Color.BLACK;//字体颜色 private float mTextSize;//字体大小 private int location;//从哪个位置开始 private float startAngle;//开始角度 private OnLoadingCompleteListener mLoadingCompleteListener; public CircleProgressView(Context context) { this(context, null); } public CircleProgressView(Context context, @Nullable AttributeSet attrs) { this(context, attrs, 0); } public CircleProgressView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.CircleProgressView); location = array.getInt(R.styleable.CircleProgressView_location, 1); mPaintWidth = array.getDimension(R.styleable.CircleProgressView_progress_paint_width, dip2px(context, 4));//默认4dp mPaintColor = array.getColor(R.styleable.CircleProgressView_progress_paint_color, mPaintColor); mTextSize = array.getDimension(R.styleable.CircleProgressView_progress_text_size, dip2px(context, 18));//默认18sp mTextColor = array.getColor(R.styleable.CircleProgressView_progress_text_color, mTextColor); array.recycle(); //画笔->背景圆弧 mPaintOut = new Paint(); mPaintOut.setAntiAlias(true); mPaintOut.setStrokeWidth(mPaintWidth); mPaintOut.setStyle(Paint.Style.STROKE); mPaintOut.setColor(Color.GRAY); mPaintOut.setStrokeCap(Paint.Cap.ROUND); //画笔->进度圆弧 mPaintCurrent = new Paint(); mPaintCurrent.setAntiAlias(true); mPaintCurrent.setStrokeWidth(mPaintWidth); mPaintCurrent.setStyle(Paint.Style.STROKE); mPaintCurrent.setColor(mPaintColor); mPaintCurrent.setStrokeCap(Paint.Cap.ROUND); //画笔->绘制字体 mPaintText = new Paint(); mPaintText.setAntiAlias(true); mPaintText.setStyle(Paint.Style.FILL); mPaintText.setColor(mTextColor); mPaintText.setTextSize(mTextSize); if (location == 1) {//默认从左侧开始 startAngle = -180; } else if (location == 2) { startAngle = -90; } else if (location == 3) { startAngle = 0; } else if (location == 4) { startAngle = 90; } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int width = MeasureSpec.getSize(widthMeasureSpec); int height = MeasureSpec.getSize(heightMeasureSpec); int size = width > height ? height : width; setMeasuredDimension(size, size); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //绘制背景圆弧,因为画笔有一定的宽度，所有画圆弧的范围要比View本身的大小稍微小一些，不然画笔画出来的东西会显示不完整 RectF rectF = new RectF(mPaintWidth / 2, mPaintWidth / 2, getWidth() - mPaintWidth / 2, getHeight() - mPaintWidth / 2); canvas.drawArc(rectF, 0, 360, false, mPaintOut); //绘制当前进度 float sweepAngle = 360 * mCurrent / 100; canvas.drawArc(rectF, startAngle, sweepAngle, false, mPaintCurrent); //绘制进度数字 String text = mCurrent + "%"; //获取文字宽度 float textWidth = mPaintText.measureText(text, 0, text.length()); float dx = getWidth() / 2 - textWidth / 2; Paint.FontMetricsInt fontMetricsInt = mPaintText.getFontMetricsInt(); float dy = (fontMetricsInt.bottom - fontMetricsInt.top) / 2 - fontMetricsInt.bottom; float baseLine = getHeight() / 2 + dy; canvas.drawText(text, dx, baseLine, mPaintText); if (mLoadingCompleteListener != null && mCurrent == 100) { mLoadingCompleteListener.complete(); } } /** * 获取当前进度值 * * @return */ public int getmCurrent() { return mCurrent; } /** * 设置当前进度并重新绘制界面 * * @param mCurrent */ public void setmCurrent(int mCurrent) { this.mCurrent = mCurrent; invalidate(); } public void setOnLoadingCompleteListener(OnLoadingCompleteListener loadingCompleteListener) { this.mLoadingCompleteListener = loadingCompleteListener; } public interface OnLoadingCompleteListener { void complete(); } /** * 根据手机的分辨率从 dp 的单位 转成为 px(像素) */ public static int dip2px(Context context, float dpValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (dpValue * scale + 0.5f); } }