Android 如何使用onItemSelectedListener更改视图的颜色
我似乎无法确定如何使onItemSelectedListender界面正常工作。我想更改所选项目的颜色,然后在取消选择后将其更改回原来的颜色。我已经读了一些书,不久前我还用onItemSelectedListener做了类似的事情 我的代码是Android 如何使用onItemSelectedListener更改视图的颜色,android,android-layout,Android,Android Layout,我似乎无法确定如何使onItemSelectedListender界面正常工作。我想更改所选项目的颜色,然后在取消选择后将其更改回原来的颜色。我已经读了一些书,不久前我还用onItemSelectedListener做了类似的事情 我的代码是 libraryGrid.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSel
libraryGrid.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
//I want to change the color of the view that was just selected
view.setBackgroundColor(Color.GRAY);
adapterView.getSelectedView().setBackgroundColor(Color.YELLOW);
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
//How do I access the view that was just unselected to change it's color?
adapterView.setBackgroundColor(Color.BLACK);
}
});
libraryGrid.setOnItemSelectedListener(新的AdapterView.OnItemSelectedListener(){
@凌驾
已选择公共视图(AdapterView AdapterView、View视图、int i、long l){
//我想更改刚刚选定的视图的颜色
视图.背景颜色(颜色.灰色);
adapterView.getSelectedView().setBackgroundColor(Color.YELLOW);
}
@凌驾
未选择公共无效(AdapterView AdapterView){
//如何访问刚刚未选中的视图以更改其颜色?
adapterView.setBackgroundColor(颜色:黑色);
}
});
您可以跟踪所选项目,并从getView方法更改该项目的背景
这样试试看
libraryGrid.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
mSelectedItem = position;
mAdapter.notifyDataSetChanged();
}
@Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
谢谢你的回复。我有一个文本视图的网格视图。结果表明,点击文本视图并不被视为选择。所以在我的例子中,我需要使用onItemClickListener而不是onItemSelectedListener,在这种情况下,我需要像你说的那样记录状态。setbackgroundcolor上的CheeserSlll值异常。为什么?
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final View view = View.inflate(context, R.layout.item_list, null);
if (position == mSelectedItem) {
//set Selected color as background on view
}
else{
//set unSelected color as background on View
}
return view;
}