Android自定义水平渐变进度条

 import android.content.Context; import android.graphics.Canvas; import android.graphics.LinearGradient; import android.graphics.Paint; import android.graphics.RectF; import android.graphics.Shader; import android.util.AttributeSet; import android.util.Log; import android.view.View; /** * * 自定义 进度条 * Created by wenjing.tang on 2017/8/7. */ public class CustomizedProgressBar extends View { private float maxCount = 100; //进度条最大值 private float currentCount; //进度条当前值 // private Paint mPaint ; private int mWidth,mHeight; private Context mContext; public CustomizedProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(context); } public CustomizedProgressBar(Context context, AttributeSet attrs) { super(context, attrs); initView(context); } public CustomizedProgressBar(Context context) { super(context); initView(context); } private void initView(Context context) { mContext=context; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); Paint mPaint = new Paint(); mPaint.setAntiAlias(true); int round = mHeight/2; //半径 mPaint.setColor(getResources().getColor(R.color.white_alpha)); //设置边框背景颜色 RectF rectBg = new RectF(0, 0, mWidth, mHeight); canvas.drawRoundRect(rectBg, round, round, mPaint);//绘制 最外面的大 圆角矩形，背景为白色 float section = currentCount/maxCount; //进度条的比例 RectF rectProgressBg = new RectF(0, 0, mWidth*section, mHeight); Log.e("CustomizedProgressBar", currentCount+""); Log.e("CustomizedProgressBar", section+""); //Paint设置setColor(白色无透明)和setShader，只让setShader生效；不然前面setColor设置了透明度，透明度会生效，和setShader效果叠加 mPaint.setColor(getResources().getColor(R.color.white)); mPaint.setShader(getLinearGradient()); canvas.drawRoundRect(rectProgressBg, round, round, mPaint); //最左边的圆角矩形 if (maxCount != currentCount){ //如果不是100%，绘制第三段矩形 RectF rectProgressBg2 = new RectF(mWidth*section-round, 0, mWidth*section, mHeight); mPaint.setShader(getLinearGradient()); canvas.drawRect(rectProgressBg2, mPaint); } } private LinearGradient linearGradient; private LinearGradient getLinearGradient(){ if(linearGradient==null){ linearGradient = new LinearGradient(0, 0, getWidth(), mHeight, new int[]{mContext.getResources().getColor(R.color.progress_color_1), mContext.getResources().getColor(R.color.progress_color_2)}, null, Shader.TileMode.CLAMP); //根据R文件中的id获取到color } return linearGradient; } private int dipToPx(int dip) { float scale = getContext().getResources().getDisplayMetrics().density; return (int) (dip * scale + 0.5f * (dip >= 0 ? 1 : -1)); } /*** * 设置最大的进度值 * @param maxCount 最大的进度值 */ public void setMaxCount(float maxCount) { this.maxCount = maxCount; } /*** * 设置当前的进度值 * @param currentCount 当前进度值 */ public void setCurrentCount(float currentCount) { this.currentCount = currentCount > maxCount ? maxCount : currentCount; invalidate(); } public float getMaxCount() { return maxCount; } public float getCurrentCount() { return currentCount; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); if (widthSpecMode == MeasureSpec.EXACTLY || widthSpecMode == MeasureSpec.AT_MOST) { mWidth = widthSpecSize; } else { mWidth = 0; } if (heightSpecMode == MeasureSpec.AT_MOST || heightSpecMode == MeasureSpec.UNSPECIFIED) { mHeight = dipToPx(18); } else { mHeight = heightSpecSize; } setMeasuredDimension(mWidth, mHeight); } } 

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 customizedProgressBar.setMaxCount(100); integrity = dataCount/TOTAL_COUNT *100; //根据自己情况来初始化完整度 customizedProgressBar.setCurrentCount((int) integrity); mTvtDataIntegrity.setText("完整度" + (int) integrity +"%");