本篇内容主要讲解“Android如何实现简单实用的垂直进度条”,感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷,实用性强。下面就让小编来带大家学习“Android如何实现简单实用的垂直进度条”吧!
支持属性:
progress_radius 进度条圆角大小
progress_border_enable 进度条是否有边框
progress_gradient_enable 进度条颜色是否渐变
progress_start_color 从上到下进度条开始的渐变色
progress_end_color 从上到下进度条结束的渐变色
progress_solid_color 带边框进度条的背景填充色
progress_border_color 进度条边框的颜色
progress_border_width 进度条边框的宽度
有需要定义其他属性的,可以进行扩充下面是效果图
上代码
VerticalProgress
public class VerticalProgress extends View { //进度条圆角 private int mRadius; //进度条是否有边框 private boolean mBorderEnable; //是否有渐变色 private boolean mGradientEnable; //渐变色 private int mStartResId; private int mEndResId; //边框的颜色 private int mBorderColorResId; //进度条背景填充色 private int mProgressBgColorId; //边框宽度 private int mBorderWidth; private int mProgress = 10; private int max = 100; private int mWidth; private int mHeight; private RectF mRectF; private Paint mPaint; public VerticalProgress(Context context) { super(context); init(context, null); } public VerticalProgress(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(context, attrs); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); mWidth = getMeasuredWidth() - 1;// 宽度值 mHeight = getMeasuredHeight() - 1;// 高度值 } private void init(Context context, AttributeSet attrs) { TypedArray typedArray = null; if (attrs != null) { typedArray = context.obtainStyledAttributes(attrs, R.styleable.verticalProgress); mRadius = typedArray.getInt(R.styleable.verticalProgress_progress_radius, 0); mBorderEnable = typedArray.getBoolean(R.styleable.verticalProgress_progress_border_enable, false); mGradientEnable = typedArray.getBoolean(R.styleable.verticalProgress_progress_gradient_enable, true); mStartResId = typedArray.getResourceId(R.styleable.verticalProgress_progress_start_color, R.color.colorPrimary); mProgressBgColorId = typedArray.getResourceId(R.styleable.verticalProgress_progress_solid_color, R.color.white); mEndResId = typedArray.getResourceId(R.styleable.verticalProgress_progress_end_color, R.color.color_4EA6FD); mBorderColorResId = typedArray.getResourceId(R.styleable.verticalProgress_progress_border_color, R.color.color_4EA6FD); mBorderWidth = typedArray.getResourceId(R.styleable.verticalProgress_progress_border_width, 10); } if (typedArray != null) { typedArray.recycle(); } mRectF = new RectF(); mPaint = new Paint(); mPaint.setAntiAlias(true); } @SuppressLint("DrawAllocation") @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if (mRadius == 0) { //弧度为高度的一半 mRadius = mWidth / 2; } if (mBorderEnable) { //第一层矩形(描边层) mRectF.set(0, 0, mWidth, mHeight); //第一层矩形颜色(进度条描边的颜色) mPaint.setColor(getResources().getColor(mBorderColorResId)); //画第一层圆角矩形 canvas.drawRoundRect(mRectF, mRadius, mRadius, mPaint); //第二层矩形颜色(背景层颜色) mPaint.setColor(getResources().getColor(mProgressBgColorId)); //第二层矩形(背景层) mRectF.set(mBorderWidth, mBorderWidth, mWidth - mBorderWidth, mHeight - mBorderWidth); //画背景层圆角矩形(盖在描边层之上) canvas.drawRoundRect(mRectF, mRadius, mRadius, mPaint); } if (mProgress == 0)//进度为 0不画进度 return; float section = mProgress / max; //进度层底层 mRectF.set(+8, mHeight - mProgress / 100f * mHeight + 10, mWidth - 8, mHeight - 8); if (mGradientEnable) { //渐变器 LinearGradient shader = new LinearGradient(0, 0, mWidth * section, mHeight, getResources().getColor(mStartResId), getResources().getColor(mEndResId), Shader.TileMode.CLAMP); //第三层矩形颜色(进度渐变色) mPaint.setShader(shader); } //画第三层(进度层)圆角矩形(盖在背景层之上) canvas.drawRoundRect(mRectF, mRadius, mRadius, mPaint); //清除之前传递的shader mPaint.setShader(null); } public void setProgress(int currentCount) { this.mProgress = currentCount > max ? max : currentCount; postInvalidate(); } }
attr.xml样式
<declare-styleable name="verticalProgress"> <attr name="progress_radius" format="dimension" /> <attr name="progress_border_width" format="dimension" /> <attr name="progress_gradient_enable" format="boolean" /> <attr name="progress_border_enable" format="boolean" /> <attr name="progress_start_color" format="color" /> <attr name="progress_solid_color" format="color" /> <attr name="progress_end_color" format="color" /> <attr name="progress_border_color" format="boolean" /> </declare-styleable>
最后调用示例
<com.widget.VerticalProgress android:id="@+id/vp_progress" android:layout_width="20dp" android:layout_height="match_parent" app:progress_border_enable="true" app:progress_solid_color="@color/white" android:layout_centerInParent="true" />
到此,相信大家对“Android如何实现简单实用的垂直进度条”有了更深的了解,不妨来实际操作一番吧!这里是亿速云网站,更多相关内容可以进入相关频道进行查询,关注我们,继续学习!
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