Android ListView项目赢得'；t扩展宽度以填充父对象

我有一个自定义的

ViewGroup

，它从

xml

布局中展开

ListView

。列表项布局是从另一个

xml

文件膨胀而来的。所有视图都设置为

fill\u parent

。

ListView

填充其父项，但

ListView

项不填充

我已尝试将

列表视图

放入

线性布局

并为其分配权重。也尝试了

RelativeLayout

。此外，我还构建了

ListView

programmaticaly，而没有使用

xml

布局。甚至在将视图添加到

ViewGroup

之前更改了

LayoutParams

我也考虑了这些帖子：

你知道为什么这些项目没有扩展到填充宽度吗？如何扩展它们

MyViewGroup类：

public class MyViewGroup extends ViewGroup {

    public MyViewGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
        generateMyViewGroup();

    }

    private void generateMyViewGroup()
    {
        ListView main = (ListView) View.inflate(getContext(), R.layout.layout_main, null);

        main.setAdapter(new MyAdapter(getContext()));

        this.addView(main);     
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        this.getChildAt(0).layout(l, t, r, b);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginRight="3dp"
    android:background="#77000000"
    android:cacheColorHint="#00000000"
    android:divider="#00000000"
    android:dividerHeight="0dp"
    android:drawSelectorOnTop="false"
    android:scrollbars="vertical" >
</ListView>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_main_category"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@color/mainBackground"
    android:gravity="fill_horizontal|center_vertical"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/main_category"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:paddingBottom="7dp"
        android:paddingLeft="20dp"
        android:paddingRight="5dp"
        android:paddingTop="20dp"
        android:text="test"
        android:textColor="@color/mainCategory"
        android:textSize="15sp"
        android:textStyle="bold" />

</LinearLayout>

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder;

    if(null == convertView)
    {
        LayoutInflater inflater = LayoutInflater.from(context);
        convertView = inflater.inflate(R.layout.layout_main_category, null);

        viewHolder = new ViewHolder();

        viewHolder.mainItemTitle = (TextView) convertView.findViewById(R.id.main_category);

        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) convertView.getTag(); 
    }

    viewHolder.mainItemTitle.setText("text");

    return convertView;
}

private static class ViewHolder {
        public TextView menuItemTitle;
}

public class MyView extends RelativeLayout {
    //Extra code unchanged ....

    private void generateMyView()
    {
        ListView menu = (ListView) View.inflate(getContext(), R.layout.layout_main, null);

        menu.setAdapter(new MyAdapter(getContext()));

        this.addView(menu);
    }

    //Removed onLayout()
}

ListView

xml

布局：

public class MyViewGroup extends ViewGroup {

    public MyViewGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
        generateMyViewGroup();

    }

    private void generateMyViewGroup()
    {
        ListView main = (ListView) View.inflate(getContext(), R.layout.layout_main, null);

        main.setAdapter(new MyAdapter(getContext()));

        this.addView(main);     
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        this.getChildAt(0).layout(l, t, r, b);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginRight="3dp"
    android:background="#77000000"
    android:cacheColorHint="#00000000"
    android:divider="#00000000"
    android:dividerHeight="0dp"
    android:drawSelectorOnTop="false"
    android:scrollbars="vertical" >
</ListView>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_main_category"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@color/mainBackground"
    android:gravity="fill_horizontal|center_vertical"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/main_category"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:paddingBottom="7dp"
        android:paddingLeft="20dp"
        android:paddingRight="5dp"
        android:paddingTop="20dp"
        android:text="test"
        android:textColor="@color/mainCategory"
        android:textSize="15sp"
        android:textStyle="bold" />

</LinearLayout>

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder;

    if(null == convertView)
    {
        LayoutInflater inflater = LayoutInflater.from(context);
        convertView = inflater.inflate(R.layout.layout_main_category, null);

        viewHolder = new ViewHolder();

        viewHolder.mainItemTitle = (TextView) convertView.findViewById(R.id.main_category);

        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) convertView.getTag(); 
    }

    viewHolder.mainItemTitle.setText("text");

    return convertView;
}

private static class ViewHolder {
        public TextView menuItemTitle;
}

public class MyView extends RelativeLayout {
    //Extra code unchanged ....

    private void generateMyView()
    {
        ListView menu = (ListView) View.inflate(getContext(), R.layout.layout_main, null);

        menu.setAdapter(new MyAdapter(getContext()));

        this.addView(menu);
    }

    //Removed onLayout()
}

属于

MyAddapter

class:

public class MyViewGroup extends ViewGroup {

    public MyViewGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
        generateMyViewGroup();

    }

    private void generateMyViewGroup()
    {
        ListView main = (ListView) View.inflate(getContext(), R.layout.layout_main, null);

        main.setAdapter(new MyAdapter(getContext()));

        this.addView(main);     
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        this.getChildAt(0).layout(l, t, r, b);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginRight="3dp"
    android:background="#77000000"
    android:cacheColorHint="#00000000"
    android:divider="#00000000"
    android:dividerHeight="0dp"
    android:drawSelectorOnTop="false"
    android:scrollbars="vertical" >
</ListView>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_main_category"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@color/mainBackground"
    android:gravity="fill_horizontal|center_vertical"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/main_category"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:paddingBottom="7dp"
        android:paddingLeft="20dp"
        android:paddingRight="5dp"
        android:paddingTop="20dp"
        android:text="test"
        android:textColor="@color/mainCategory"
        android:textSize="15sp"
        android:textStyle="bold" />

</LinearLayout>

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder;

    if(null == convertView)
    {
        LayoutInflater inflater = LayoutInflater.from(context);
        convertView = inflater.inflate(R.layout.layout_main_category, null);

        viewHolder = new ViewHolder();

        viewHolder.mainItemTitle = (TextView) convertView.findViewById(R.id.main_category);

        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) convertView.getTag(); 
    }

    viewHolder.mainItemTitle.setText("text");

    return convertView;
}

private static class ViewHolder {
        public TextView menuItemTitle;
}

public class MyView extends RelativeLayout {
    //Extra code unchanged ....

    private void generateMyView()
    {
        ListView menu = (ListView) View.inflate(getContext(), R.layout.layout_main, null);

        menu.setAdapter(new MyAdapter(getContext()));

        this.addView(menu);
    }

    //Removed onLayout()
}

---

如果您覆盖了

onLayout

，您也应该覆盖

onMeasure

。。几乎总是

@Override 
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
   int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
   int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
   this.setMeasuredDimension(parentWidth, parentHeight);
   // this.setLayoutParams(new 
          //   *ParentLayoutType*.LayoutParams(parentWidth,parentHeight));
   super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

如果仍然不起作用，也可以使用注释行

更新： 另一种选择是忘记

onLayout

和

onMeasure

，覆盖

onFinishInflate（）

，并将这些行添加到其中。如果您正在从xml中膨胀

MyViewGroup

protected void onFinishInflate () {
    super.onFinishInflate();
    ListView main = (ListView) View.inflate(getContext(), 
                                    R.layout.layout_main,null);
    main.setAdapter(new MyAdapter(getContext()));
    this.addView(main); 
}

---

视图组

最终无法正常工作。我还尝试使用

线性布局

。但是

RelativeLayout

最终正确地扩展了布局。因此，我的

xml

布局和适配器保持不变，但我更改了主类以扩展

RelativeLayout

。还删除了

onLayout（）

MyView类：

public class MyViewGroup extends ViewGroup {

    public MyViewGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
        generateMyViewGroup();

    }

    private void generateMyViewGroup()
    {
        ListView main = (ListView) View.inflate(getContext(), R.layout.layout_main, null);

        main.setAdapter(new MyAdapter(getContext()));

        this.addView(main);     
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        this.getChildAt(0).layout(l, t, r, b);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginRight="3dp"
    android:background="#77000000"
    android:cacheColorHint="#00000000"
    android:divider="#00000000"
    android:dividerHeight="0dp"
    android:drawSelectorOnTop="false"
    android:scrollbars="vertical" >
</ListView>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_main_category"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@color/mainBackground"
    android:gravity="fill_horizontal|center_vertical"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/main_category"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:paddingBottom="7dp"
        android:paddingLeft="20dp"
        android:paddingRight="5dp"
        android:paddingTop="20dp"
        android:text="test"
        android:textColor="@color/mainCategory"
        android:textSize="15sp"
        android:textStyle="bold" />

</LinearLayout>

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder;

    if(null == convertView)
    {
        LayoutInflater inflater = LayoutInflater.from(context);
        convertView = inflater.inflate(R.layout.layout_main_category, null);

        viewHolder = new ViewHolder();

        viewHolder.mainItemTitle = (TextView) convertView.findViewById(R.id.main_category);

        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) convertView.getTag(); 
    }

    viewHolder.mainItemTitle.setText("text");

    return convertView;
}

private static class ViewHolder {
        public TextView menuItemTitle;
}

public class MyView extends RelativeLayout {
    //Extra code unchanged ....

    private void generateMyView()
    {
        ListView menu = (ListView) View.inflate(getContext(), R.layout.layout_main, null);

        menu.setAdapter(new MyAdapter(getContext()));

        this.addView(menu);
    }

    //Removed onLayout()
}

---

添加项目视图膨胀代码also@TomerMor我已经添加了我正在使用的自定义

BaseAdapter

的

getView（）

函数。MyViewgroup有什么用？@userSeven7s我正在不同的活动中使用视图。为什么要覆盖onLayout？总之，调用super.onLayout...

列表视图显示。我可以看到它的背景。但是没有一件物品再出现了。我已经尝试了您的所有3个选项。我最终将
视图组更改为
相对视图。