如何让 ViewPager 和 gridview 同时垂直滚动

Question

我的活动中有 ViewPager 和网格视图。我希望​​当我在屏幕上的任意位置滚动时，ViewPager 和网格视图应该同时滚动。这是我的 ss：图像。现在网格视图中显示的只有少数图像我有 63图像但在网格中只显示 9..2) ss main

xml:

<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:background="#fff">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">

<androidx.viewpager.widget.ViewPager
    android:id="@+id/viewPager"
    android:layout_width="match_parent"
    android:layout_height="150dp"
    android:layout_marginBottom="8dp"/>


<LinearLayout
    android:id="@+id/SliderDots"
    android:layout_below="@+id/viewPager"
    android:orientation="horizontal"
    android:gravity="center_vertical|center_horizontal"
    android:layout_width="match_parent"
    android:layout_height="15dp"/>


<GridView
    android:id="@+id/mGridView"
    android:layout_width="match_parent"
    android:layout_height="554dp"
    android:background="#ffffff"
    android:columnWidth="172dp"
    android:gravity="center"
    android:horizontalSpacing="5dp"
    android:numColumns="auto_fit"
    android:paddingLeft="5dp"
    android:paddingTop="5dp"
    android:paddingRight="5dp"
    android:stretchMode="columnWidth"
    android:verticalSpacing="5dp"
    />
</LinearLayout>
 </androidx.core.widget.NestedScrollView>

Answer 1

使用此代码解决您的问题

<androidx.core.widget.NestedScrollView
  android:layout_width="match_parent"
  android:layout_height="wrap_content">


<LinearLayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical">

<androidx.viewpager.widget.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="150dp"
android:layout_marginBottom="8dp"/>


<LinearLayout
android:id="@+id/SliderDots"
android:layout_below="@+id/viewPager"
android:orientation="horizontal"
android:gravity="center_vertical|center_horizontal"
android:layout_width="match_parent"
android:layout_height="15dp"/>


<GridView
android:id="@+id/mGridView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:columnWidth="172dp"
android:gravity="center"
android:horizontalSpacing="5dp"
android:numColumns="auto_fit"
android:paddingLeft="5dp"
android:paddingTop="5dp"
android:paddingRight="5dp"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp" />

</LinearLayout>

</androidx.core.widget.NestedScrollView>

Answer 2

您必须使用CUSTOM viewpager来实现viewpager 的垂直滚动，因为默认的 viewpager不支持其他组件的垂直滚动。

检查我下面的代码。

public class CustomViewPager extends ViewPager {

    private View mCurrentView;

    public CustomViewPager(Context context) {
        super(context);
    }

    public CustomViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (mCurrentView == null) {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
            return;
        }
        int height = 0;
        mCurrentView.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
        int h = mCurrentView.getMeasuredHeight();
        if (h > height) height = h;
        heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST);

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    public void measureCurrentView(View currentView) {
        mCurrentView = currentView;
        requestLayout();
    }

    public int measureFragment(View view) {
        if (view == null)
            return 0;

        view.measure(0, 0);
        return view.getMeasuredHeight();
    }
}

将这个类而不是默认的 ViewPager 应用到您的片段中。 就是这样！！