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Android如何模拟实现华为系统升级进度条

发表于:2024-11-23 作者:千家信息网编辑
千家信息网最后更新 2024年11月23日,这篇文章主要为大家展示了"Android如何模拟实现华为系统升级进度条",内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下"Android如何模拟实现华为系统升级
千家信息网最后更新 2024年11月23日Android如何模拟实现华为系统升级进度条

这篇文章主要为大家展示了"Android如何模拟实现华为系统升级进度条",内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下"Android如何模拟实现华为系统升级进度条"这篇文章吧。

    下面开始讲解虚线进度条的实现方法,首先看一张图:

    实现步骤

    大家可以先想想这种进度条是怎么实现的?网上有各种各样的方法,也有人用path的lineTo()方法实现了类似的效果。但是我个人觉得canvas的drawArc方法也是个不错的选择,适合自己的才是最好的。

    canvas.drawArc(rectF, 0, process, false, mPaint);

    阅读了大量文章,最后发现改变paint的样式是最简单好用的方法。给paint设置一个effect就好了。

    1.用DashPathEffect给paint加上虚线效果

    DashPathEffect dashPathEffect = new DashPathEffect(new float[]{8, 6}, 0);mPaintBack.setPathEffect(dashPathEffect);

    build一下项目,看到的结果是这样的:

    能实现这个效果就大功告成了,如果看过我前面两篇文章的朋友们就知道,后面的步骤就简单了,加个进度条和动画效果就可以了。

    private void drawBack(Canvas canvas) {        RectF rectF = new RectF(strokeWidth, strokeWidth, getWidth() - strokeWidth, getHeight() - strokeWidth);        PathEffect effects = new DashPathEffect(new float[]{8, 6}, 0);        mPaintBack.setPathEffect(effects);        canvas.drawArc(rectF, 0, 360, false, mPaintBack);    }

    2.画出进度条

    画进度条和画背景完全一样,只是画笔颜色和小点个数不一样。

    代码如下:

     private void drawProgress(Canvas canvas) {        RectF rectF = new RectF(strokeWidth, strokeWidth, getWidth() - strokeWidth, getHeight() - strokeWidth);        PathEffect effects = new DashPathEffect(new float[]{8, 6}, 0);        mPaint.setPathEffect(effects);        canvas.drawArc(rectF, 0, process, false, mPaint);    }

    3.绘制文字

    接下来是绘制文字,实现文字居中的效果。思路是计算出圆心,调用canvas.drawText的方法就能在canvas上面绘制文字了。这里不需要更新进度文字,所以就更省事了。

    EMUI 下面的10.0.0也是一样的方法,只是给Y坐标加一下55,往下移一点就好。

        //绘制文字    private void drawText(Canvas canvas) {        int mTxtWidth = getTextWidth();        int mTxtHeight = getTextHeight();        int x = getWidth() / 2 - mTxtWidth / 2;        int y = getHeight() / 2 + mTxtHeight / 4;        canvas.drawText(getResources().getString(R.string.defaultTextEmui), x, y, mPaintText);    }     //绘制下方文字    private void drawTextBlow(Canvas canvas) {        int mTxtWidth = getTextWidthBlow();        int mTxtHeight = getTextHeight();        int x = getWidth() / 2 - mTxtWidth / 2;        int y = getHeight() / 2 + mTxtHeight / 4 + 55;        canvas.drawText(getResources().getString(R.string.defaultTextBelow), x, y, mPaintTextLevel);    }

    4.加入动画效果

      /**     * 设置动画效果     */    public void start() {        ValueAnimator valueAnimator = ValueAnimator.ofInt(0, 360);        valueAnimator.setDuration(duration);        valueAnimator.setInterpolator(new LinearInterpolator());        valueAnimator.addUpdateListener(animation -> {            process = (int) animation.getAnimatedValue();            invalidate();        });        valueAnimator.start();    }

    最终效果:

    完整代码

    package com.example.floatingwindow.widget; import android.animation.ValueAnimator;import android.content.Context;import android.graphics.Canvas;import android.graphics.DashPathEffect;import android.graphics.Paint;import android.graphics.PathEffect;import android.graphics.RectF;import android.util.AttributeSet;import android.util.TypedValue;import android.view.View;import android.view.animation.LinearInterpolator; import androidx.annotation.Nullable; import com.example.floatingwindow.R; public class DottedLineProgressBar extends View {     private Paint mPaint;    private Paint mPaintBack;    private Paint mPaintText;    private Paint mPaintTextLevel;    private int strokeWidth = 30;    private int textSize = 22;    private int textSizeBlow = 15;    private long duration = 3500;    private int process;     public DottedLineProgressBar(Context context) {        super(context);        init();    }     public DottedLineProgressBar(Context context, @Nullable AttributeSet attrs) {        super(context, attrs);        init();    }     public DottedLineProgressBar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init();    }     public void setStrokeWidth(int width) {        strokeWidth = width;    }     public void setTextSize(int textSize) {        this.textSize = textSize;    }     public void setDuration(long duration) {        this.duration = duration;    }     public void setTextSizeBlow(int textSizeBlow) {        this.textSizeBlow = textSizeBlow;    }     //初始化画笔    private void init() {        mPaintBack = new Paint();//圆角矩形        mPaintBack.setColor(getResources().getColor(R.color.gray));//圆角矩形颜色        mPaintBack.setAntiAlias(true);// 抗锯齿效果        mPaintBack.setStyle(Paint.Style.STROKE);//设置画笔样式        mPaintBack.setStrokeWidth(strokeWidth);//设置画笔宽度         mPaint = new Paint();        mPaint.setColor(getResources().getColor(R.color.blue));        mPaint.setAntiAlias(true);        mPaint.setStyle(Paint.Style.STROKE);        mPaint.setStrokeWidth(strokeWidth);         mPaintText = new Paint();        mPaintText.setAntiAlias(true);        mPaintText.setStyle(Paint.Style.FILL);        mPaintText.setColor(getResources().getColor(R.color.blue));        mPaintText.setTextSize(sp2px(textSize));         mPaintTextLevel = new Paint();        mPaintTextLevel.setAntiAlias(true);        mPaintTextLevel.setStyle(Paint.Style.FILL);        mPaintTextLevel.setColor(getResources().getColor(R.color.gray));        mPaintTextLevel.setTextSize(sp2px(textSizeBlow));    }     @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        drawBack(canvas);        drawProgress(canvas);        drawText(canvas);        drawTextBlow(canvas);    }     private void drawBack(Canvas canvas) {        RectF rectF = new RectF(strokeWidth, strokeWidth, getWidth() - strokeWidth, getHeight() - strokeWidth);        PathEffect effects = new DashPathEffect(new float[]{8, 6}, 0);        mPaintBack.setPathEffect(effects);        canvas.drawArc(rectF, 0, 360, false, mPaintBack);    }     private void drawProgress(Canvas canvas) {        RectF rectF = new RectF(strokeWidth, strokeWidth, getWidth() - strokeWidth, getHeight() - strokeWidth);        PathEffect effects = new DashPathEffect(new float[]{8, 6}, 0);        mPaint.setPathEffect(effects);        canvas.drawArc(rectF, 0, process, false, mPaint);    }     //绘制文字    private void drawText(Canvas canvas) {        int mTxtWidth = getTextWidth();        int mTxtHeight = getTextHeight();        int x = getWidth() / 2 - mTxtWidth / 2;        int y = getHeight() / 2 + mTxtHeight / 4;        canvas.drawText(getResources().getString(R.string.defaultTextEmui), x, y, mPaintText);    }     //绘制下方文字    private void drawTextBlow(Canvas canvas) {        int mTxtWidth = getTextWidthBlow();        int mTxtHeight = getTextHeight();        int x = getWidth() / 2 - mTxtWidth / 2;        int y = getHeight() / 2 + mTxtHeight / 4 + 55;        canvas.drawText(getResources().getString(R.string.defaultTextBelow), x, y, mPaintTextLevel);    }     private int getTextWidth() {        String text = getResources().getString(R.string.defaultTextEmui);        return (int) mPaintText.measureText(text, 0, text.length());    }     private int getTextWidthBlow() {        String text = getResources().getString(R.string.defaultTextBelow);        return (int) mPaintTextLevel.measureText(text, 0, text.length());    }     private int getTextHeight() {        Paint.FontMetrics fm = mPaintText.getFontMetrics();        return (int) Math.ceil(fm.descent - fm.ascent);    }     private int sp2px(int sp) {        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, sp,                getResources().getDisplayMetrics());    }     /**     * 设置动画效果     */    public void start() {        ValueAnimator valueAnimator = ValueAnimator.ofInt(0, 360);        valueAnimator.setDuration(duration);        valueAnimator.setInterpolator(new LinearInterpolator());        valueAnimator.addUpdateListener(animation -> {            process = (int) animation.getAnimatedValue();            invalidate();        });        valueAnimator.start();    }}

    kotlin调用:

    class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)         setContentView(R.layout.activity_main)         dottedLineProgressBar.post {            dottedLineProgressBar.start()        }    }}

    XML:

                    

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