如何突出选定gridview的项目 [英] How to highlight selected gridview items
本文介绍了如何突出选定gridview的项目的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
使用gridview的 CHOICE_MODE_MULTIPLE_MODAL 来选择我的gridview的多个项目（图像）IM。
我用 MultiChoiceModeListener 来实现这一点，问题是选择的项目没有得到突出
选择XML：
＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT;选择的xmlns：机器人=http://schemas.android.com/apk/res/android＆GT;
＆LT;项目的android：state_selected =真正的机器人：可绘制=@色/绿色/＆GT;
＆LT;项目的android：STATE_ pressed =真
机器人：可绘制=@色/蓝色/＆GT; ＆LT;！ - pressed状态 - ＆GT;
＆LT;项目的android：state_focused =真
机器人：可绘制=@色/蓝色/＆GT; ＆LT;！ - 聚焦状态 - ＆GT;
＆LT;项目机器人：可绘制=@机器人：彩色/透明/＆GT; ＆LT;！ - 默认状态 - ＆GT; ＆LT; /选择＆GT;
当我触摸得到它覆盖着蓝色的项目（我认为这种情况发生bcoz我用 gridView.setDrawSelectorOnTop（真）; ）......只要我举起我的手指蓝色移除。
我要选择的项目要获得强调与半透明蓝色颜色，它应该保持选中状态，直到我取消该项目。
Java的code：
公共类HappyFragment扩展ParentFragment { 公共HappyImageAdapter imageAdapter;
私人列表＆LT; ResolveInfo＆GT; MAPPS;
GridView控件GridView控件; 公共静态的newInstance HappyFragment（）{
HappyFragment片段=新HappyFragment（）;
返回片段;
} @覆盖
公共无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;//如果（（savedInstanceState = NULL）及！＆安培; savedInstanceState.containsKey（KEY_CONTENT））{
// // mContent = savedInstanceState.getString（KEY_CONTENT）;
//}
} @覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，捆绑savedInstanceState）{
查看查看= inflater.inflate（R.layout.happy_fragment_layout，集装箱，FALSE）;
// ImageView的IV =（ImageView的）view.findViewById（R.id.imageView1）;
GridView控件=（GridView控件）view.findViewById（R.id.gvHappy）; // ImageAdapter类的实例
imageAdapter =新HappyImageAdapter（getActivity（））;
gridView.setAdapter（imageAdapter）;
gridView.setChoiceMode（GridView.CHOICE_MODE_MULTIPLE_MODAL）;
gridView.setMultiChoiceModeListener（新MultiChoiceModeListener（））;
gridView.setDrawSelectorOnTop（真）;
gridView.setSelector（getResources（）getDrawable（R.drawable.gridview_selector））; gridView.setOnItemLongClickListener（新OnItemLongClickListener（）{ 公共布尔onItemLongClick（适配器视图＆LT;＆GT;为arg0，ARG1查看，INT位置，长ARG3）{
Toast.makeText（getActivity（），将String.valueOf（imageAdapter.mThumbIds [位置]），Toast.LENGTH_SHORT）.show（）;
返回true;
}
}）; gridView.setOnItemClickListener（新OnItemClickListener（）{
@覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，视图V，INT位置，长的id）{
如果（BaseActivity.isinint）{//检查是否有任何应用程序关心的结果
INT ImageResourse = imageAdapter.mThumbIds [位置]
URI路径= Uri.parse（android.resource：//dragonflymobile.stickers.lifestickers/+ ImageResourse）; 意图shareIntent =新意图（android.content.Intent.ACTION_SEND，路径）; //创建一个新的意图。第一个参数表示要发送的文件。第二个参数是URI指向到SD卡上的文件。 （开放式preV有数据类型文件） （（活动）getActivity（））的setResult（Activity.RESULT_OK，shareIntent）。 //设置文件/意图的结果
（（活动）getActivity（）），完成（）; //关闭应用程序并回到如Gmail和WhatsApp的请求应用程序
返回; //不执行以下code，不重要
}其他{
意向意图=新意图（getActivity（），previewActivity.class）;
intent.putExtra（图像诠释，imageAdapter.mThumbIds [位置]）;
startActivity（意向）;
}
}
}）;
返回视图。
} @覆盖
公共无效的onSaveInstanceState（捆绑outState）{
super.onSaveInstanceState（outState）;
// outState.putString（KEY_CONTENT，mContent）;
} //多选模式codeS
公共类MultiChoiceModeListener实现GridView.MultiChoiceModeListener {
公共布尔onCreateActionMode（ActionMode模式，菜单菜单）{
mode.setTitle（选择项）;
mode.setSubtitle（一个项目选择了）;
返回true;
} 在prepareActionMode公共布尔（ActionMode模式，菜单菜单）{
返回true;
} 公共布尔onActionItemClicked（ActionMode模式，菜单项项）{
返回true;
} 公共无效onDestroyActionMode（ActionMode模式）{
} 公共无效onItemCheckedStateChanged（ActionMode模式，INT位置，长的ID，布尔检查）{
INT selectCount = gridView.getCheckedItemCount（）;
开关（selectCount）{
情况1：
mode.setSubtitle（一个项目选择了）;
打破;
默认：
mode.setSubtitle（+ selectCount +项目中选择）;
打破;
}
}
}
}
解决方案
好吧，我发现这个第三方库，它做的正是这样用更少的code
这里是github上链接
和这里是图像的GridView教程 rel=\"nofollow\">链接
im using gridview CHOICE_MODE_MULTIPLE_MODAL to select multiple items(images) in my gridview .
I used MultiChoiceModeListener to achieve this, the problem is selected items are not get highlighted
Selector xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_selected="true" android:drawable="@color/green"/>
<item android:state_pressed="true"
android:drawable="@color/blue"/> <!-- pressed state -->
<item android:state_focused="true"
android:drawable="@color/blue"/> <!-- focused state -->
<item android:drawable="@android:color/transparent"/> <!-- default state -->
</selector>
When I touch an item it get covered with blue (i think this happens bcoz i used gridView.setDrawSelectorOnTop(true); )...as soon as i lift my finger blue color get removed.
I want the selected items to get highlighted with semi transparent blue color and it should stay highlighted until I deselect the item.
Java Code:
public class HappyFragment extends ParentFragment {
public HappyImageAdapter imageAdapter;
private List<ResolveInfo> mApps;
GridView gridView;
public static HappyFragment newInstance() {
HappyFragment fragment = new HappyFragment();
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// if ((savedInstanceState != null) && savedInstanceState.containsKey(KEY_CONTENT)) {
// // mContent = savedInstanceState.getString(KEY_CONTENT);
// }
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.happy_fragment_layout, container, false);
// ImageView iv= (ImageView) view.findViewById(R.id.imageView1);
gridView = (GridView)view.findViewById(R.id.gvHappy);
// Instance of ImageAdapter Class
imageAdapter = new HappyImageAdapter(getActivity());
gridView.setAdapter(imageAdapter);
gridView.setChoiceMode(GridView.CHOICE_MODE_MULTIPLE_MODAL);
gridView.setMultiChoiceModeListener(new MultiChoiceModeListener());
gridView.setDrawSelectorOnTop(true);
gridView.setSelector(getResources().getDrawable(R.drawable.gridview_selector));
gridView.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
Toast.makeText(getActivity(), String.valueOf(imageAdapter.mThumbIds[position]), Toast.LENGTH_SHORT).show();
return true;
}
});
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v,int position, long id) {
if(BaseActivity.isinint) { // check if any app cares for the result
int ImageResourse=imageAdapter.mThumbIds[position];
Uri path = Uri.parse("android.resource://dragonflymobile.stickers.lifestickers/" + ImageResourse);
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND, path); //Create a new intent. First parameter means that you want to send the file. The second parameter is the URI pointing to a file on the sd card. (openprev has the datatype File)
((Activity)getActivity()).setResult(Activity.RESULT_OK, shareIntent); //set the file/intent as result
((Activity)getActivity()).finish(); //close your application and get back to the requesting application like GMail and WhatsApp
return; //do not execute code below, not important
} else {
Intent intent = new Intent(getActivity(), PreviewActivity.class);
intent.putExtra("Image Int", imageAdapter.mThumbIds[position]);
startActivity(intent);
}
}
});
return view;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// outState.putString(KEY_CONTENT, mContent);
}
//multi select mode codes
public class MultiChoiceModeListener implements GridView.MultiChoiceModeListener {
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
mode.setTitle("Select Items");
mode.setSubtitle("One item selected");
return true;
}
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return true;
}
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
return true;
}
public void onDestroyActionMode(ActionMode mode) {
}
public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
int selectCount = gridView.getCheckedItemCount();
switch (selectCount) {
case 1:
mode.setSubtitle("One item selected");
break;
default:
mode.setSubtitle("" + selectCount + " items selected");
break;
}
}
}
}
解决方案
okay i found this 3rd party library which do exactly this with less code here is the github link
and here is a gridview with images tutorial link
这篇关于如何突出选定gridview的项目的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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