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这期内容当中小编将会给大家带来有关Android中怎么实现一个炫酷进度条效果，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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HorizontalProgressbarWithProgress的代码
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.widget.ProgressBar;
import trunk.doi.base.R;
public class HorizontalProgressbarWithProgress extends ProgressBar{
private static final int DEFAULT_TEXT_SIZE=10;//sp
private static final int DEFAULT_TEXT_COLOR=0xFFFC00D1;
private static final int DEFAULT_COLOR_UNREACH=0xFFD3D6DA;
private static final int DEFAULT_HEIGHT_UNREACH=2;//dp
private static final int DEFAULT_COLOR_REACH=DEFAULT_TEXT_COLOR;
private static final int DEFAULT_HEIGHT_REACH=2;
private static final int DEFAULT_TEXT_OFFSET=10;
protected int mTextSize=sp2px(DEFAULT_TEXT_SIZE);
protected int mTextColor=DEFAULT_TEXT_COLOR;
protected int mUnReachColor=DEFAULT_COLOR_UNREACH;
protected int mUnReachHeigh=dp2px(DEFAULT_HEIGHT_UNREACH);
protected int mReachHeigh=dp2px(DEFAULT_HEIGHT_REACH);
protected int mReachColor=DEFAULT_COLOR_REACH;
protected int mTextOffset=dp2px(DEFAULT_TEXT_OFFSET);
protected Paint mPaint=new Paint();
protected int mRealWidth;
public HorizontalProgressbarWithProgress(Context context) {
super(context);
init(null);
}
public HorizontalProgressbarWithProgress(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs);
}
public HorizontalProgressbarWithProgress(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(attrs);
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public HorizontalProgressbarWithProgress(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(attrs);
}
private void init(AttributeSet attrs) {
/**
* 获取dimension的方法有几种，区别不大
* 共同点是都会将dp，sp的单位转为px，px单位的保持不变
*
* getDimension() 返回float，
* getDimensionPixelSize 返回int 小数部分四舍五入
* getDimensionPixelOffset 返回int，但是会抹去小数部分
*/
TypedArray array=getContext().obtainStyledAttributes(attrs, R.styleable.HorizontalProgressbarWithProgress);
mTextSize= (int) array.getDimension(R.styleable.HorizontalProgressbarWithProgress_progress_text_size,mTextSize);
mTextColor=array.getColor(R.styleable.HorizontalProgressbarWithProgress_progress_text_color,mTextColor);
mUnReachColor=array.getColor(R.styleable.HorizontalProgressbarWithProgress_progress_unreach_color,mUnReachColor);
mUnReachHeigh=(int) array.getDimension(R.styleable.HorizontalProgressbarWithProgress_progress_unreach_height,mUnReachHeigh);
mReachHeigh=(int) array.getDimension(R.styleable.HorizontalProgressbarWithProgress_progress_reach_height,mReachHeigh);
mTextOffset=(int) array.getDimension(R.styleable.HorizontalProgressbarWithProgress_progress_text_offset,mTextOffset);
mReachColor=array.getColor(R.styleable.HorizontalProgressbarWithProgress_progress_reach_color,mReachColor);
array.recycle();
mPaint.setTextSize(mTextSize);
}
@Override
protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// int widthMode=MeasureSpec.getMode(widthMeasureSpec);
int width=MeasureSpec.getSize(widthMeasureSpec);
int heigh=measureHeight(heightMeasureSpec);
setMeasuredDimension(width,heigh);
mRealWidth=getMeasuredWidth()-getPaddingLeft()-getPaddingRight();
}
private int measureHeight(int heightMeasureSpec) {
int result=0;
int mode=MeasureSpec.getMode(heightMeasureSpec);
int size=MeasureSpec.getSize(heightMeasureSpec);
if(mode==MeasureSpec.EXACTLY){
result=size;
}else{
int textHeigh= (int) (mPaint.descent()-mPaint.ascent());
result=getPaddingTop()+getPaddingBottom()+Math.max(Math.max(mReachHeigh,mUnReachHeigh),Math.abs(textHeigh));
if(mode==MeasureSpec.AT_MOST){
result=Math.min(result,size);
}
}
return result;
}
@Override
protected synchronized void onDraw(Canvas canvas) {
canvas.save();
canvas.translate(getPaddingLeft(),getHeight()/2);
boolean noNeedUnReach=false;
String text=getProgress()+"%";
int textWidth= (int) mPaint.measureText(text);
float radio =getProgress()*1.0f/getMax();
float progressX=radio*mRealWidth;
if(progressX+textWidth>mRealWidth){
progressX=mRealWidth-textWidth;
noNeedUnReach=true;
}
float endX=progressX-mTextOffset/2;
if(endX>0){
mPaint.setColor(mReachColor);
mPaint.setStrokeWidth(mReachHeigh);
canvas.drawLine(0,0,endX,0,mPaint);
}
//draw text
mPaint.setColor(mTextColor);
int y = (int) (-(mPaint.descent()+mPaint.ascent())/2);
canvas.drawText(text,progressX,y,mPaint);
//draw unreach bar
if(!noNeedUnReach){
float startX=progressX+ mTextOffset/2+textWidth;
mPaint.setColor(mUnReachColor);
mPaint.setStrokeWidth(mUnReachHeigh);
canvas.drawLine(startX,0,mRealWidth,0,mPaint);
}
canvas.restore();
}
protected int dp2px(int dpVal){
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,dpVal,getResources().getDisplayMetrics());
}
protected int sp2px(int spVal){
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,spVal,getResources().getDisplayMetrics());
}
}RoundProgressBarWithProgress的代码
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.util.AttributeSet;
import trunk.doi.base.R;
/**
* 作者：Mr.Lee on 2017-10-18 10:48
* 邮箱：569932357@qq.com
*/
public class RoundProgressBarWithProgress extends HorizontalProgressbarWithProgress {
private int mRadius=dp2px(30);
private int mMaxPaintWidth;
public RoundProgressBarWithProgress(Context context) {
super(context);
init(null);
}
public RoundProgressBarWithProgress(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs);
}
public RoundProgressBarWithProgress(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(attrs);
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public RoundProgressBarWithProgress(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(attrs);
}
private void init(AttributeSet attrs){
mReachHeigh= (int) (mUnReachHeigh*2.5f);
TypedArray array=getContext().obtainStyledAttributes(attrs, R.styleable.RoundProgressBarWithProgress);
mRadius=(int) array.getDimension(R.styleable.RoundProgressBarWithProgress_radius,mRadius);
array.recycle();
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setStrokeCap(Paint.Cap.ROUND);
}
@Override
protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
mMaxPaintWidth=Math.max(mReachHeigh,mUnReachHeigh);
//默认4个padding一致
int except=mRadius*2+mMaxPaintWidth+getPaddingLeft()+getPaddingRight();
int width=resolveSize(except,widthMeasureSpec);
int height=resolveSize(except,heightMeasureSpec);
int realWidth=Math.min(width,height);
mRadius=(realWidth-getPaddingLeft()-getPaddingRight()-mMaxPaintWidth)/2;
setMeasuredDimension(realWidth,realWidth);
}
@Override
protected synchronized void onDraw(Canvas canvas) {
String text=getProgress()+"%";
float textWidth=mPaint.measureText(text);
float textHeight=(mPaint.ascent()+mPaint.descent())/2;
canvas.save();
canvas.translate(getPaddingLeft(),getPaddingTop());
mPaint.setStyle(Paint.Style.STROKE);
// draw unreachbar
mPaint.setColor(mUnReachColor);
mPaint.setStrokeWidth(mUnReachHeigh);
canvas.drawCircle(mRadius,mRadius,mRadius,mPaint);
//draw reach bar
mPaint.setColor(mReachColor);
mPaint.setStrokeWidth(mReachHeigh);
float sweepAngle=getProgress()*1.0f/getMax()*360;
canvas.drawArc(new RectF(0,0,mRadius*2,mRadius*2),0,sweepAngle,false,mPaint);
//draw text
mPaint.setColor(mTextColor);
mPaint.setStyle(Paint.Style.FILL);
canvas.drawText(text,mRadius-textWidth/2,mRadius-textHeight,mPaint);
canvas.restore();
}
}activity_view_mv代码
ViewMvActivity代码
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.widget.AppCompatSeekBar;
import android.view.MotionEvent;
import android.view.View;
import android.widget.RelativeLayout;
import android.widget.SeekBar;
import butterknife.BindView;
import trunk.doi.base.R;
import trunk.doi.base.base.BaseActivity;
public class ViewMvActivity extends BaseActivity {
//没有集成Butterknife的findviewbyid()
@BindView(R.id.progress_bar)
HorizontalProgressbarWithProgress progress_bar;
@BindView(R.id.progress_bar2)
RoundProgressBarWithProgress progress_bar2;
@BindView(R.id.seekbar)
AppCompatSeekBar seekbar;
private float mTouchStartY;
private static final float TOUCH_MOVE_MAX_Y=600;
@Override
protected int initLayoutId() {
return R.layout.activity_view_mv;
}
@Override
protected void initView(@Nullable Bundle savedInstanceState) {
}
@Override
protected void setListener() {
seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
progress_bar.setProgress(progress);
progress_bar2.setProgress(progress);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
@Override
protected void initData() {
}
}上述就是小编为大家分享的Android中怎么实现一个炫酷进度条效果了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。