gridview-selector的设置

其实它是跟listview相似的，如果你看下它跟listview的继承关系，就很容易理解了

public class GridView extends AbsListView {
    /**
     * Disables stretching.
     *
     * @see #setStretchMode(int)
     */
    public static final int NO_STRETCH = 0;
    /**
     * Stretches the spacing between columns.
     *
     * @see #setStretchMode(int)
     */
    public static final int STRETCH_SPACING = 1;
    /**
     * Stretches columns.
     *
     * @see #setStretchMode(int)
     */
    public static final int STRETCH_COLUMN_WIDTH = 2;
    /**
     * Stretches the spacing between columns. The spacing is uniform.
     *
     * @see #setStretchMode(int)
     */
    public static final int STRETCH_SPACING_UNIFORM = 3; 

}

而且，它里面并没有selector的方法，那我们继续看AbListView这个类

public abstract class AbsListView extends AdapterView<ListAdapter> implements TextWatcher,
        ViewTreeObserver.OnGlobalLayoutListener, Filter.FilterListener,
        ViewTreeObserver.OnTouchModeChangeListener,
        RemoteViewsAdapter.RemoteAdapterConnectionCallback {

 public void setSelector(int resID) {
        setSelector(getResources().getDrawable(resID));
    }  

    public void setSelector(Drawable sel) {
        if (mSelector != null) {
            mSelector.setCallback(null);
            unscheduleDrawable(mSelector);
        }
        mSelector = sel;
        Rect padding = new Rect();
        sel.getPadding(padding);
        mSelectionLeftPadding = padding.left;
        mSelectionTopPadding = padding.top;
        mSelectionRightPadding = padding.right;
        mSelectionBottomPadding = padding.bottom;
        sel.setCallback(this);
        updateSelectorState();
    }  

}

可以看到它里面是有这个方法的。

在xml中设定的方法如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ll_share_flipper"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >

    <GridView
        android:id="@+id/gv_share_gridview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:hapticFeedbackEnabled="true"
<!--跟listview的使用方法一样-->
        android:listSelector="@drawable/gridview_selector"
        android:numColumns="4"
        android:scrollbars="none"
        android:stretchMode="columnWidth" >
    </GridView>

</LinearLayout>