问题描述
我有一个包含多个项目的 GridView,但是一旦 onClickListener 被调用,这些项目必须保持选中状态.我怎样才能做到这一点?
I have a GridView with multiple items, but the items must be kept selected once the the onClickListener is called.How can i achive this?
我已经尝试过 v.setSelected(true)
但它似乎不起作用.
I'v already tried v.setSelected(true)
but it doesnt seem to work.
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
// Toast.makeText(Project.this, "Red" + position,
// Toast.LENGTH_SHORT).show(); //position = al catelea element
v.setPressed(true);
if (bp == 2) {
if (position == 0) {
Square.setSex(R.drawable.girl_body2v);
Square2.setHair(R.drawable.girl_hair_01v);
SquareAccesories.setAcc(R.drawable.girl_accessories_01v);
SquareEyes.setEyes(R.drawable.eyes_1v);
SquareLips.setLips(R.drawable.lip_1v);
Square3.setDress(R.drawable.girl_tops_01v);
SquareShoes.setShoes(R.drawable.girl_shoes_01v);
SquarePants.setPants(R.drawable.girl_bottom_01v);
setS(2);
这是 onClickListener 代码的一小部分,因为我有很多案例.
This is a small part of the code for the onClickListener because i have lots of cases.
推荐答案
您想要实现的概念是可能的,但不像您现在的工作方式.
The concept that you want to achieve is possible, but not like the way you are working now.
最好和最简单的解决方案是跟踪点击项目的状态,并在适配器内为它们提供正确的布局.我已经设置了一个小例子:
The best and easiest solution would be to keep track of the states of the clicked items and give them the correct layout inside the adapter. I have set up a little example:
活动
public class StackOverFlowActivity extends Activity {
GridView gridView;
MyCustomAdapter myAdapter;
ArrayList<GridObject> myObjects;
static final String[] numbers = new String[] { "A", "B", "C", "D", "E",
"F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
"S", "T", "U", "V", "W", "X", "Y", "Z" };
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myObjects = new ArrayList<GridObject>();
for (String s : numbers) {
myObjects.add(new GridObject(s, 0));
}
gridView = (GridView) findViewById(R.id.gridView1);
myAdapter = new MyCustomAdapter(this);
gridView.setAdapter(myAdapter);
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) {
myObjects.get(position).setState(1);
myAdapter.notifyDataSetChanged();
}
});
}
static class ViewHolder {
TextView text;
}
private class MyCustomAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public MyCustomAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
GridObject object = myObjects.get(position);
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item_icon_text, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.text);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.text.setText(object.getName());
if (object.getState() == 1) {
holder.text.setBackgroundColor(Color.GREEN);
} else {
holder.text.setBackgroundColor(Color.BLUE);
}
return convertView;
}
@Override
public int getCount() {
return myObjects.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
}
}
网格对象
public class GridObject {
private String name;
private int state;
public GridObject(String name, int state) {
super();
this.name = name;
this.state = state;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getState() {
return state;
}
public void setState(int state) {
this.state = state;
}
}
Main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<GridView
android:id="@+id/gridView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="50dp"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth" >
</GridView>
</LinearLayout>
list_item_icon_text
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/text"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
这篇关于Android gridview 保持项目被选中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!