Question

My WearableRecycler查看线条像三角形一样，并不像手表的主屏幕那样弯曲。我在代码中找不到任何错误。

ShareActivity：

private void initListView() {
    WearableRecyclerView recyclerView = findViewById(R.id.lVDevices);
    recyclerView.setEdgeItemsCenteringEnabled(true);
    final ScrollingLayoutCallback scrollingLayoutCallback =
            new ScrollingLayoutCallback();
    adapter = new ShareAdapter(new ShareAdapter.Callback() {
        @Override
        public void onDeviceClicked(int position, String deviceName) {
            onListItemClick(position, deviceName);
        }
    });
    recyclerView.setLayoutManager(
            new WearableLinearLayoutManager(this, scrollingLayoutCallback));
    recyclerView.setAdapter(adapter);
}

ScrollingLayoutCallback：

public class ScrollingLayoutCallback extends WearableLinearLayoutManager.LayoutCallback  {
private static final float MAX_ICON_PROGRESS = 0.65f;

@Override
public void onLayoutFinished(View child, RecyclerView parent) {

    // Figure out % progress from top to bottom
    float centerOffset = ((float) child.getHeight() / 2.0f) / (float) parent.getHeight();
    float yRelativeToCenterOffset = (child.getY() / parent.getHeight()) + centerOffset;

    // Normalize for center
    float mProgressToCenter = Math.abs(0.5f - yRelativeToCenterOffset);
    // Adjust to the maximum scale
    mProgressToCenter = Math.min(mProgressToCenter, MAX_ICON_PROGRESS);

    child.setScaleX(1 - mProgressToCenter);
    child.setScaleY(1 - mProgressToCenter);
}
}

的ListView-XML

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical">

<android.support.v4.widget.SwipeRefreshLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/refreshlayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/transparent">

    <android.support.wear.widget.WearableRecyclerView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/lVDevices"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/transparent"
        android:scrollbars="vertical"/>
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>

行的XML

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/lVDevices_row"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:background="@android:color/transparent"
      android:drawableStart="@drawable/point_img"
      android:layout_centerHorizontal="true"
      android:textSize="18sp">
</TextView>

Callback方法中存在问题吗？我的意思是计算中存在错误，因为它来自开发者网站。

编辑1：ScrollingCallback类中的新数学

float centerOffset = ((float) child.getHeight() / 2.0f) / (float) parent.getHeight();
float yRelativeToCenterOffset = (child.getY() / parent.getHeight()) + centerOffset;

float progresstoCenter = (float) Math.sin(yRelativeToCenterOffset * Math.PI);

child.setScaleX(progresstoCenter);
child.setScaleY(progresstoCenter);

WearableRecyclerView滚动不弯曲

0 个答案: