上圖: 本文代碼GitHub地址
progress.gif
兩個(gè)重點(diǎn):
- 屬性: ProgressBar的progressDrawable屬性,實(shí)現(xiàn)圓形進(jìn)度條
- 進(jìn)度: ProgressBar的progress添加屬性動(dòng)畫(huà),并且addUpdateListener來(lái)監(jiān)聽(tīng)當(dāng)前進(jìn)度
代碼
- 屬性progressDrawable的drawable:
circle_progress_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:fromDegrees="270"
android:toDegrees="270">
<shape
android:innerRadiusRatio="2.5"
android:shape="ring"
android:thickness="2dp"
android:useLevel="true">
<gradient
android:angle="0"
android:endColor="#4285f4"
android:startColor="#4285f4"
android:type="sweep"
android:useLevel="false" />
</shape>
</rotate>
- ProgressBar布局(當(dāng)然也可以把ProgressBar拆出來(lái)單獨(dú)使用):
<FrameLayout
android:id="@+id/fl_count_down_top"
android:layout_width="50dp"
android:layout_height="50dp"
android:gravity="center">
<ProgressBar
android:id="@+id/pb_count_down_top"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
// 上面的drawable
android:progressDrawable="@drawable/circle_progress_bar"
tools:max="100"
tools:progress="100" />
<TextView
android:id="@+id/tv_count_down_top"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="4dp"
android:background="@drawable/selector_circle_background"
android:gravity="center"
android:textColor="@android:color/black"
android:textSize="11sp" />
</FrameLayout>
- 給ProgressBar 添加updateListener:
objectAnimatorTop = ObjectAnimator
// 這里的animate的目標(biāo)值是0,所以在updateListener我們獲取到剩余的進(jìn)度
// 改成progressBar.getMax(),獲取到的就是正向的進(jìn)度了
.ofInt(progressBarTop, "progress", 0)
.setDuration(MS_IN_FUTURE);
// 保證動(dòng)畫(huà)的插值器是線性的
objectAnimatorTop.setInterpolator(new LinearInterpolator());
objectAnimatorTop
.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
// 通過(guò)animated多少數(shù)值,來(lái)獲取當(dāng)前剩余的進(jìn)度或者已經(jīng)完成的進(jìn)度
tvCountDownTop.setText(String.format("剩余\n%d"), (int) animation.getAnimatedValue()));
}
});
objectAnimatorTop.start();
使用
- 優(yōu)點(diǎn): 實(shí)現(xiàn)簡(jiǎn)單
- 缺點(diǎn): 如果設(shè)定的total progress time相對(duì)于ProgressBar max progress比較長(zhǎng)的話,會(huì)有斷斷續(xù)續(xù)的感覺(jué)
個(gè)人博客:
https://christmasjason.github.io
GitHub地址:
https://github.com/christmasjason/CircleProgressBar
寫(xiě)在最后:
歡迎大家批評(píng)指正_