Android-圆角正方形线进度栏

我正在尝试创建一个圆角的正方形线进度条,以围绕图像绘制进度.

到目前为止,我有以下XML定义了我的圆角正方形线：

<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <stroke
        android:width="6dp"
        android:color="@android:color/holo_green_light" />

    <padding
        android:left="5dp"
        android:right="5dp"
        android:bottom="5dp"
        android:top="5dp" />

    <corners android:radius="50dp" />

</shape>

我知道此解决方案：https://github.com/mrwonderman/android-square-progressbar,但我对效果不感兴趣,因为效果不是我想要的.

我试图在圆角正方形线的顶部创建一个普通圆,并尝试将其与PorterDuff合并,但是到目前为止,我也无法创建进度条效果.画一个圆圈,画出进度.

我还尝试过创建圆角正方形程序,以防XML膨胀被视为纯图像并且在PorterDuff合并过程中考虑了所有像素.但结果相同.

解决方法:

试试这个简单的自定义类：

class V extends View {
    Path path = new Path();
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    float length;
    float[] intervals = {0, 0};

    public V(Context context) {
        super(context);
        paint.setColor(Color.GREEN);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(20);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        path.reset();
        RectF rect = new RectF(0, 0, w, h);
        float inset = paint.getStrokeWidth();
        rect.inset(inset, inset);

        path.addRoundRect(rect, 100, 100, Path.Direction.CW);
        length = new PathMeasure(path, false).getLength();
        intervals[0] = intervals[1] = length;
        PathEffect effect = new DashPathEffect(intervals, length);
        paint.setPathEffect(effect);
    }

    public void setProgress(int progress) {
        PathEffect effect = new DashPathEffect(intervals, length - length * progress / 100);
        paint.setPathEffect(effect);
        invalidate();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawPath(path, paint);
    }
}

测试代码(放入Activity#onCreate内部)：

    LinearLayout ll = new LinearLayout(this);
    ll.setOrientation(LinearLayout.VERTICAL);
    SeekBar sb = new SeekBar(this);
    ll.addView(sb);
    final V v = new V(this);
    ll.addView(v);
    setContentView(ll);

    SeekBar.OnSeekBarChangeListener sbcl = new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
            v.setProgress(progress);
        }
        @Override public void onStartTrackingTouch(SeekBar seekBar) {}
        @Override public void onStopTrackingTouch(SeekBar seekBar) {}
    };
    sb.setOnSeekBarChangeListener(sbcl);

标签：line,android-progressbar,rounded-corners,android
来源： https://codeday.me/bug/20191118/2029378.html