动态选项卡中的动态网格视图

Question

我试图将动态生成的gridView添加到动态生成的RelativeLayout中，并为多个选项卡执行此操作。代码正在运行，但图片似乎放错了地方。我做错了什么？

public View createTabContent(String tag)
{
ArrayList<Item> gridArray = new ArrayList<Item>();
CustomGridViewAdapter customGridAdapter;

RelativeLayout layout = new RelativeLayout(MainHolder);
android.widget.RelativeLayout.LayoutParams params = 
new RelativeLayout.LayoutParams(
    LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
    layout.setLayoutParams(params);
    layout.setId(tab_id);
            GridView dynGrid = new GridView(ManageRooms.this);
            dynGrid.setId(someID);
            gridArray.add(new Item(homeIcon,"Home"));
                    ...

customGridAdapter = 
new CustomGridViewAdapter(ManageRooms.this, R.layout.row_grid, gridArray);

dynGrid.setAdapter(customGridAdapter);
layout.addView(dynGrid);
return layout;
}

row_grid.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp" >

<ImageView
    android:id="@+id/item_image"
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:layout_marginRight="10dp"
    android:src="@drawable/nfc" >
</ImageView>

<TextView
    android:id="@+id/item_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="5dp"
    android:textSize="15sp" >
</TextView>

</LinearLayout>

应该很容易修复，但无法找到任何解决方案。任何帮助将受到高度赞赏：）

Answer 1

尝试添加：您需要告诉GridView适合列：

dynGrid.setLayoutParams(new ViewGroup.LayoutParams(
        ViewGroup.LayoutParams.MATCH_PARENT,
        ViewGroup.LayoutParams.MATCH_PARENT));

dynGrid.setNumColumns(GridView.AUTO_FIT);
dynGrid.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
dynGrid.setGravity(Gravity.CENTER);
dynGrid.setColumnWidth(dpToPx(60));

private int dpToPx(int dp)
{
    float density = getResources().getDisplayMetrics().density;
    return Math.round((float) dp * density);
}

虽然更容易在XML中定义GridView并在此处充气。

Answer 2

你必须提供网格视图column count， 在你的代码中尝试这个：

gridView.setNumColumns(GridView.AUTO_FIT);

它会根据屏幕尺寸自动对齐项目。