Android 如何高亮显示选定的gridview项目
我使用gridviewAndroid 如何高亮显示选定的gridview项目,android,gridview,Android,Gridview,我使用gridviewCHOICE\u MODE\u MULTIPLE\u model在我的gridview中选择多个项目(图像) 我使用了MultiChoiceModeListener来实现这一点,问题是所选项目没有突出显示 选择器xml: <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android" >
CHOICE\u MODE\u MULTIPLE\u model
在我的gridview中选择多个项目(图像)
我使用了MultiChoiceModeListener
来实现这一点,问题是所选项目没有突出显示
选择器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>
好的,我找到了这个第三方库,它用更少的代码就可以做到这一点 这是github 这是一个带图像的gridview教程 1.将网格视图子项放入框架布局中 2.give FrameLayout属性android:foreground=“?android:attr/activatedBackgroundIndicator”
就这样。。。无需使用额外的库以防任何人想要没有第三个库的解决方案,只需将此代码放入 onItemCheckedStateChanged(这里gv是您的gridView名称)
我已经用
CHOICE\u MODE\u SINGLE
为ListView做了这件事,你可以用CHOICE\u MODE\u MULTIPLE\u model
为GridView试试,看看它的完美解决方案。我用getResources().getColor(R.Color.borderColor)
和28AABA
。这将提供与gallery中相同的颜色。:)请注意,如果您想更改网格项目后面而不是前面的突出显示颜色,请使用android:background=“?android:attr/activatedBackgroundIndicator”
。
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;
}
}
}
}
if(checked){
View tv = (View) gv.getChildAt(position);
tv.setBackgroundColor(Color.RED);
}else{
View tv = (View) gv.getChildAt(position);
tv.setBackgroundColor(Color.TRANSPARENT);
}
gridView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
@Override
public void onItemCheckedStateChanged(android.view.ActionMode actionMode, int i, long l, boolean b) {
// Capture total checked items
final int checkedCount = gridView.getCheckedItemCount();
// Set the CAB title according to total checked items
actionMode.setTitle(checkedCount + " Selected");
if(gridView.getChildAt(i).isSelected()) {
gridView.getChildAt(i).setBackgroundColor(Color.parseColor("#FF4081"));
}else{
gridView.getChildAt(i).setBackgroundColor(Color.parseColor("#b1e76905"));
}
// Calls toggleSelection method from ListViewAdapter Class
adapter.toggleSelection(i);
}