我想在长按上绘制选择器,如图所示。当我长按一个项目时,CAB 菜单被激活。但是列表选择器指示器在单击后会熄灭一次。我希望列表选择器处于活动状态,直到 CAB 菜单处于活动状态以允许多项选择。如果我双击,颜色应该会切换。当我单击它时,此代码会闪烁。有人遇到过类似的事情吗?有没有办法带来这个功能?
具有多项选择的Gridview:
我的 OnCreate 中的 GridView 设置:
gridView.setChoiceMode(GridView.CHOICE_MODE_MULTIPLE_MODAL);
gridView.setMultiChoiceModeListener(new MultiChoiceModeListener());
这工作正常:
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
ImageView iv = (ImageView) v
.findViewById(R.id.imageview2);
ViewGroup gridChild = (ViewGroup) gridView
.getChildAt(position);
ViewGroup gridGrandChild = (ViewGroup) gridChild
.getChildAt(0);
ViewGroup gridGreatGrandChild = (ViewGroup) gridGrandChild
.getChildAt(0);
int childSize = gridGreatGrandChild.getChildCount();
if (iv.getId() == gridGreatGrandChild.getChildAt(1)
.getId()) {
if (iv.getVisibility() == 4)
iv.setVisibility(View.VISIBLE);
else
iv.setVisibility(View.INVISIBLE);
}
}});
在激活 CAB 菜单后,我试图在 MultiChoiceModeListener() 类中实现相同的代码。在里面复制了相同的代码
public void onItemCheckedStateChanged(ActionMode mode, int position,
long id, boolean checked) {
}
方法。但我无法访问视图组内的元素。但我可以整体访问 GridView。但不是网格内的单个孩子。
这是我的gridview布局:
<GridView
android:id="@+id/grid_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:columnWidth="190dp"
android:drawSelectorOnTop="true"
android:choiceMode="multipleChoice"
android:horizontalSpacing="3dp"
android:listSelector="@drawable/list_selector"
android:numColumns="auto_fit"
android:paddingRight="4dp"
android:stretchMode="spacingWidthUniform"
android:verticalSpacing="3dp" >
</GridView>
GridView 中的每个项目都使用以下布局构造:
<FrameLayout
android:id="@+id/frameLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<RelativeLayout
android:id="@+id/relativelayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/imageview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</ImageView>
<ImageView
android:id="@+id/imageview2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/imageview"
android:layout_alignLeft="@+id/imageview"
android:layout_alignRight="@+id/imageview"
android:layout_alignTop="@+id/imageview"
android:visibility="invisible"
android:background="#76f9a49c"
>
</ImageView>
</RelativeLayout>
<ImageView
android:id="@+id/tagimage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top|right"
android:layout_marginRight="-4dp"
android:src="@drawable/tag"
android:visibility="invisible" />
<ImageView
android:id="@+id/countimage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:layout_marginBottom="8dp"
android:layout_marginRight="5dp"
android:src="@drawable/dealcount_overlay"
android:visibility="invisible" />
<TextView
android:id="@+id/count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:layout_marginBottom="11dp"
android:layout_marginRight="24dp"
android:text="100"
android:textColor="#fff"
android:visibility="invisible" >
</TextView>
<ProgressBar
android:id="@+id/progressbar"
style="@android:style/Widget.ProgressBar.Small"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:visibility="visible" />
</FrameLayout>
<TextView
android:id="@+id/textView_nodata"
android:layout_width="wrap_content"
android:layout_height="150dp"
android:layout_below="@+id/frameLayout1"
android:layout_centerHorizontal="true"
android:text="No data available. Try different query!"
android:textAppearance="?android:attr/textAppearanceLarge"
android:visibility="gone" />
</RelativeLayout>
这是我的 list_selector.xml:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/gridviewlistselector" android:state_focused="true" android:state_pressed="false"/>
<item android:state_focused="true"><shape>
<solid android:color="#66000000" />
</shape></item>
<item android:state_selected="true"><shape>
<solid android:color="#66000000" />
</shape></item>
<item android:state_pressed="true"><shape>
<solid android:color="#66000000" />
</shape></item>
<item android:state_enabled="false" android:state_focused="true"><shape>
<solid android:color="#66000000" />
</shape></item>
</selector>
如何实现该功能?我陷入了困境。我在选择器上尝试了各种组合。但似乎没有什么对我有用。我需要提供任何其他细节吗?