最近一直忙着项目开发，有段时间没有写博文了，今天想跟大家分享的是长按gridview中的某一项显示删除图标，此时点击某项便可删除，再长按取消删除图标。
gridview的布局文件如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ll_grid_item"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical" >
<FrameLayout
android:id="@+id/starred_item_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/bg_btn_selector_deny"
android:gravity="center"
android:orientation="vertical"
android:layout_marginTop="4dip"
android:layout_marginRight="4dip" >
<ImageView
android:id="@+id/img"
android:layout_width="60dip"
android:layout_height="55dip" />
<TextView
android:id="@+id/name_tv"
android:layout_width="70dip"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:textColor="@android:color/black"
android:textSize="15sp"
android:textStyle="bold"
android:gravity="center" />
</LinearLayout>
<ImageView
android:id="@+id/delete_markView"
android:layout_width="20dip"
android:layout_height="20dip"
android:adjustViewBounds="true"
android:layout_gravity="right|top"
android:visibility="gone"
android:src="@drawable/delete"
/>
</FrameLayout>
</LinearLayout>
gridview的adapter如下：
public class GridViewAdapter extends BaseAdapter{
private String names[];
private int icons[];
private Context mContext;
private TextView name_tv;
private ImageView img;
private View deleteView;
private boolean isShowDelete;//根据这个变量来判断是否显示删除图标，true是显示，false是不显示
public FragmentGridViewAdapter(Context mContext,String names[], int icons[]) {
this.mContext = mContext;
this.names=names;
this.icons=icons;
}
public void setIsShowDelete(boolean isShowDelete){
this.isShowDelete=isShowDelete;
notifyDataSetChanged();
}
@Override
public int getCount() {
return icons.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return icons[position];
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
convertView = LayoutInflater.from(mContext).inflate(
R.layout.fragmet_grid_item, null);
img = (ImageView) convertView.findViewById(R.id.img);
name_tv = (TextView) convertView.findViewById(R.id.name_tv);
deleteView = convertView.findViewById(R.id.delete_markView);
deleteView.setVisibility(isShowDelete?View.VISIBLE:View.GONE);//设置删除按钮是否显示
img.setBackgroundResource(icons[position]);
name_tv.setText(names[position]);
return convertView;
}
}
看到这里大家是否觉得很简单呢，接下来，我们就可以在长按方法里来设置isShowDelete的值了
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
if (isShowDelete) {
isShowDelete = false;
} else {
isShowDelete = true;
}
mGridAdapter.setIsShowDelete(isShowDelete);
return true;
}