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android - 创建具有特定滚动动画效果的自定义圆形进度条

转载 作者:太空狗 更新时间:2023-10-29 13:05:23 25 4
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我正在尝试创建一个带有特定滚动动画效果的自定义进度条,它看起来或多或少类似于 mi fit android 应用程序中的效果,请参见下面的屏幕截图:如果你仔细看 gif 你会注意到两件事 -

  1. A glowing motion revolving around the progress bars outer ring

  2. when scrolled down or up (collapsing effect), the effects are beautiful

mi progress enter image description here

我正在尝试在这里实现这两种效果,感谢您的帮助:)

编辑:我使进度条正常工作 - 请参阅下面更新代码的屏幕截图:

worked on screen shot

我正在创建三层,一层用于外圆,另一层用于虚线圆,另一层用于用实心圆填充虚线。然后在三个进度条中使用这三个形状,请参见下面的代码:layout.xml :

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorPrimary"
android:gravity="center">

<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="250dp"
android:layout_height="250dp"
android:layout_centerInParent="true"
android:max="100"
android:progress="100"
android:progressDrawable="@drawable/circular_layer_outer" />

<ProgressBar
android:id="@+id/progressBar2"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="230dp"
android:layout_height="230dp"
android:layout_centerInParent="true"
android:max="100"
android:progress="100"
android:progressDrawable="@drawable/circular_layer_dash_inner" />

<ProgressBar
android:id="@+id/main_progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="226dp"
android:layout_height="226dp"
android:layout_centerInParent="true"
android:max="100"
android:progress="80"
android:progressDrawable="@drawable/circular_layer_dash_filler"
android:visibility="visible" />

两个进度的形状:circular_layer_dash_inner.xml:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:paddingBottom="13dp"
android:paddingLeft="13dp"
android:paddingRight="13dp"
android:paddingTop="13dp">
<item>
<rotate
android:fromDegrees="270"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="270">
<shape
android:dither="true"
android:innerRadiusRatio="3"
android:shape="ring"
android:thickness="0sp"
android:useLevel="true">
<solid android:color="@color/white" />
<stroke
android:width="1dp"
android:color="@color/white"
android:dashGap="2dp"
android:dashWidth="1dp" />
</shape>
</rotate>
</item>
</layer-list>

circular_layer_dash_filler.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:paddingBottom="13dp"
android:paddingLeft="13dp"
android:paddingRight="13dp"
android:paddingTop="13dp">
<item>
<rotate
android:fromDegrees="270"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="270">
<shape
android:dither="true"
android:innerRadiusRatio="3"
android:shape="ring"
android:thickness="2sp"
android:useLevel="true">
<solid android:color="@color/white" />
</shape>
</rotate>
</item>
</layer-list>

circular_layer_outer.xml:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape
android:innerRadiusRatio="3"
android:shape="ring"
android:thickness="8sp"
android:useLevel="true">
<solid android:color="@color/white" />
</shape>
</item>

附注很抱歉发了这么长的帖子。

最佳答案

我能够通过以下方式创建动画:

<android.support.design.widget.AppBarLayout
android:id="@+id/appBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/blue"
android:fitsSystemWindows="true">

<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsingToolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:expandedTitleGravity="center_horizontal"
app:layout_scrollFlags="scroll|exitUntilCollapsed">

<RelativeLayout
android:id="@+id/layers_progress"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/blue_safe"
app:layout_collapseMode="parallax">

<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="250dp"
android:layout_height="250dp"
android:layout_centerInParent="true"
android:max="100"
android:progress="100"
android:progressDrawable="@drawable/circular_layer_outer" />

<ProgressBar
android:id="@+id/progressBar2"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="230dp"
android:layout_height="230dp"
android:layout_centerInParent="true"
android:max="100"
android:progress="100"
android:progressDrawable="@drawable/circular_layer_dash_inner" />

<ProgressBar
android:id="@+id/main_progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="226dp"
android:layout_height="226dp"
android:layout_centerInParent="true"
android:max="100"
android:progress="80"
android:progressDrawable="@drawable/circular_layer_dash_filler"
android:visibility="visible" />

</RelativeLayout>

<TextView
android:id="@+id/score_val"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Score"
android:textColor="@color/white"
android:textSize="36sp"
android:textStyle="bold"
android:visibility="visible"
app:layout_collapseMode="parallax" />

</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

这里可以看到 CollapsingToolbarLayoutAppBarLayout 中使用,然后使用 AppBarLayout 并设置 OnOffsetChangedListener监听 AppBarLayout 高度值的变化,见下面的代码:

AppBarLayout appbar = findViewById(R.id.appBar);
appbar.addOnOffsetChangedListener(DashboardScore.this);

然后在 onOffsetChanged 中:

@Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
if (mMaxScrollSize == 0)
mMaxScrollSize = appBarLayout.getTotalScrollRange();

currentScrollPercentage = (Math.abs(verticalOffset)) * 100 / mMaxScrollSize;
Log.d("Debug info", "% == " + currentScrollPercentage + " -- mMaxScrollSize == " + mMaxScrollSize + " vertical offset - " + verticalOffset);
showAnim(oldScrollPercentage, currentScrollPercentage);
oldScrollPercentage = currentScrollPercentage;
}

此处 private int mMaxScrollSize;
private int currentScrollPercentage, oldScrollPercentage = 0;

对于 showAnim() 使用,这里 parentProgressProgressBars 的父级:

void showAnim(int fromDegree, int toDegree) {
final float centerX = parentProgress.getWidth() / 2.0f;
final float centerY = parentProgress.getHeight() / 2.0f;
final Rotate3dAnimation rotation = new Rotate3dAnimation(fromDegree, toDegree, centerX, centerY, 5.0f, false);
rotation.setDuration(400);
rotation.setFillAfter(true);
rotation.setInterpolator(new AccelerateInterpolator());
parentProgress.startAnimation(rotation);
if (currentScrollPercentage > 0) {
if (fromDegree < 90)
parentProgress.setAlpha(1 - Math.abs((float) currentScrollPercentage / 100f));
else
parentProgress.setAlpha(0);

Log.d("Debug info", "setAlpha == " + (1 - Math.abs((float) currentScrollPercentage / 100f)));
}
}

对于 Rotate3dAnimation 使用:

public class Rotate3dAnimation extends Animation {
private final float mFromDegrees;
private final float mToDegrees;
private final float mCenterX;
private final float mCenterY;
private final float mDepthZ;
private final boolean mReverse;
private Camera mCamera;

/**
* Creates a new 3D rotation on the Y axis. The rotation is defined by its
* start angle and its end angle. Both angles are in degrees. The rotation
* is performed around a center point on the 2D space, definied by a pair
* of X and Y coordinates, called centerX and centerY. When the animation
* starts, a translation on the Z axis (depth) is performed. The length
* of the translation can be specified, as well as whether the translation
* should be reversed in time.
*
* @param fromDegrees the start angle of the 3D rotation
* @param toDegrees the end angle of the 3D rotation
* @param centerX the X center of the 3D rotation
* @param centerY the Y center of the 3D rotation
* @param reverse true if the translation should be reversed, false otherwise
*/
public Rotate3dAnimation(float fromDegrees, float toDegrees,
float centerX, float centerY, float depthZ, boolean reverse) {
mFromDegrees = fromDegrees;
mToDegrees = toDegrees;
mCenterX = centerX;
mCenterY = centerY;
mDepthZ = depthZ;
mReverse = reverse;
}

@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
mCamera = new Camera();
}

@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
final float fromDegrees = mFromDegrees;
float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);

final float centerX = mCenterX;
final float centerY = mCenterY;
final Camera camera = mCamera;

final Matrix matrix = t.getMatrix();

camera.save();
if (mReverse) {
camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
} else {
camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime));
}
//camera.rotateY(degrees);
camera.rotateX(degrees);
camera.getMatrix(matrix);
camera.restore();

matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}

同时检查 thisthis加深理解

关于android - 创建具有特定滚动动画效果的自定义圆形进度条,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48658388/

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