Android 如何使用SimpleAdapter使ImageView在ListView中可单击?
我有一个使用SimpleAdapter生成的Listview。我的Listview在单击行时显示另一个Listview。我已在适配器中放置了一个ImageView。我想使ImageView可单击以更改ImageView的图片。有人可以建议我如何操作吗? 我在下面发布我的代码:Android 如何使用SimpleAdapter使ImageView在ListView中可单击?,android,listview,imageview,simpleadapter,Android,Listview,Imageview,Simpleadapter,我有一个使用SimpleAdapter生成的Listview。我的Listview在单击行时显示另一个Listview。我已在适配器中放置了一个ImageView。我想使ImageView可单击以更改ImageView的图片。有人可以建议我如何操作吗? 我在下面发布我的代码: public View onCreateView(LayoutInflater inflater1, ViewGroup container, Bundle savedInstanceState)
public View onCreateView(LayoutInflater inflater1, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater1.inflate(R.layout.listview_header_row, container, false);
final ImageView im=(ImageView)rootView.findViewById(R.id.imageView1);
SharedPreferences pref = getActivity().getPreferences(0);
final String id = pref.getString("mynumber", "empty");
Databasehandler db=new Databasehandler(getActivity().getApplicationContext());
final ListView l=(ListView) rootView.findViewById(R.id.listViewad);
val=db.getTaskSent(id);
ListAdapter k=new SimpleAdapter(getActivity(),val,R.layout.r,new String[]{"TaskId","heading"},new int[]{R.id.textViews,R.id.textViews1});
l.setAdapter(k);
im.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Toast.makeText(getActivity(), "json", Toast.LENGTH_SHORT).show();
}
});
l.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
TextView tv2=(TextView) arg1.findViewById(R.id.textViews);
String t=tv2.getText().toString();
Intent i4=new Intent(getActivity(),SentTaskOnclick.class);
i4.putExtra("taskId",t);
startActivity(i4);
}
});
创建视图时的公共视图(布局、充气机1、视图组容器、,
Bundle savedInstanceState){
视图根视图=充气器1.充气(R.layout.listview\u header\u row,container,false);
最终ImageView im=(ImageView)rootView.findViewById(R.id.imageView1);
SharedReferences pref=getActivity().getPreferences(0);
最终字符串id=pref.getString(“mynumber”、“empty”);
Databasehandler db=新的Databasehandler(getActivity().getApplicationContext());
最终ListView l=(ListView)rootView.findViewById(R.id.listViewad);
val=db.getTaskSent(id);
ListAdapter k=new SimpleAdapter(getActivity(),val,R.layout.R,新字符串[]{“TaskId”,“heading”},新int[]{R.id.textViews,R.id.textViews1});
l、 setAdapter(k);
im.setOnClickListener(新的OnClickListener(){
@凌驾
公共void onClick(视图arg0){
//TODO自动生成的方法存根
Toast.makeText(getActivity(),“json”,Toast.LENGTH_SHORT.show();
}
});
l、 setOnItemClickListener(新的OnItemClickListener(){
@凌驾
公共链接(AdapterView arg0、视图arg1、,
整数arg2,长arg3){
TextView tv2=(TextView)arg1.findViewById(R.id.TextView);
字符串t=tv2.getText().toString();
Intent i4=新的Intent(getActivity(),SentTaskOnclick.class);
i4.putExtra(“任务ID”,t);
星触觉(i4);
}
});
我将分享我的一些代码,我想你可以对你的问题有一个想法。 您还可以自己下载并测试代码: 这是我的单元格类,我在其中管理单击并更改图像颜色(在本例中,我只需要将图片设置为灰度) 公共类CategoryCell扩展RelativeLayout实现OnClickListener{
private Category category;
private ImageView icon;
private boolean selected = true;
public CategoryCell(Context context, AttributeSet attrs) {
super(context,attrs);
LayoutInflater.from(getContext()).inflate(R.layout.category_cell, this, true);
setOnClickListener(this);
}
public void init(Category category){
this.category = category;
icon = (ImageView)findViewById(R.id.category_icon);
icon.setImageDrawable(category.getIcon(getContext()));
icon.getDrawable().clearColorFilter();
if(isSelected())
GlobalState.getInstance().addCategory(category);
}
public CategoryCell(Context context) {
this(context,null);
}
@Override
public void onClick(View v) {
setSelected(!isSelected());
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
if(category==null)
return;
this.selected = selected;
if(!isSelected()){
ColorMatrix matrix = new ColorMatrix();
matrix.setSaturation(0);
ColorMatrixColorFilter filter = new ColorMatrixColorFilter(matrix);
icon.getDrawable().setColorFilter(filter);
icon.invalidate();
GlobalState.getInstance().removeCategory(category);
}else{
GlobalState.getInstance().addCategory(category);
icon.getDrawable().clearColorFilter();
icon.invalidate();
}
}
public Category getCategory() {
return category;
}
}
在这里,您可以查看我的Row类,我只是将单元格添加到视图中
public class CategoryRow extends LinearLayout {
private LinearLayout root;
private Map<Category,CategoryCell> cells = new HashMap<Category, CategoryCell>();
public CategoryRow(Context context, AttributeSet attrs) {
super(context, attrs);
root = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.category_row, this, true);
}
public CategoryRow(Context context) {
super(context);
root = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.category_row, this, true);
}
public static CategoryRow create(ViewGroup parent, LayoutInflater inflater) {
final CategoryRow view = new CategoryRow(parent.getContext());
return view;
}
public void init(Type type, List<Category> cells) {
LinearLayout ll = (LinearLayout)root.getChildAt(0);
for(int i = 0;i<cells.size();i++) {
CategoryCell cell = ((CategoryCell)ll.getChildAt(i));
cell.init(cells.get(i));
this.cells.put(cells.get(i),cell);
}
}
public Map<Category,CategoryCell> getCells() {
return cells;
}
}
公共类CategorRow扩展了LinearLayout{
私有线性布局根;
私有映射单元格=新HashMap();
公共类别(上下文、属性集属性){
超级(上下文,attrs);
root=(LinearLayout)LayoutInflater.from(context).膨胀(R.layout.category_行,this,true);
}
公共类别(上下文){
超级(上下文);
root=(LinearLayout)LayoutInflater.from(context).膨胀(R.layout.category_行,this,true);
}
公共静态类别创建(视图组父级、布局更平坦充气器){
final CategoryRow视图=新CategoryRow(parent.getContext());
返回视图;
}
公共void init(类型,列表单元格){
LinearLayout ll=(LinearLayout)root.getChildAt(0);
对于(int i=0;i
public class CategoryList extends ListView {
private List<List<Category>> categories = new ArrayList<List<Category>>();
private Map<Category,CategoryCell> cells = new HashMap<Category, CategoryCell>();
private Type type;
public CategoryList(Context context, AttributeSet attrs) {
super(context, attrs);
setBackgroundColor(getResources().getColor(R.color.wet_asphalt));
setDivider(null);
setVerticalFadingEdgeEnabled(false);
setVerticalScrollBarEnabled(false);
setHorizontalScrollBarEnabled(false);
Utils.changeRoundedCornersColor(this, R.color.carrot,false);
if(isInEditMode())
init(Type.BAR);
}
public void init(Type type){
this.type = type;
categories.clear();
if(getAdapter()!=null)
((CategoryAdapter)getAdapter()).notifyDataSetChanged();
setAdapter(null);
categories = loadCells();
setAdapter(new CategoryAdapter());
((CategoryAdapter)getAdapter()).notifyDataSetChanged();
}
private List<List<Category>> loadCells() {
List<List<Category>> cells = new ArrayList<List<Category>>();
int rowLimitCounter = 0;
ArrayList<Category> categoryCells = null;
Category[] categories = Category.values();
for(int i = 0;i<categories.length;i++){
if(rowLimitCounter==0)
categoryCells = new ArrayList<Category>();
categoryCells.add(categories[i]);
rowLimitCounter++;
if(rowLimitCounter>3 || i == (categories.length-1)){
cells.add(categoryCells);
rowLimitCounter=0;
}
}
return cells;
}
private class CategoryAdapter extends BaseAdapter{
private final LayoutInflater inflater;
public CategoryAdapter() {
inflater = LayoutInflater.from(getContext());
}
@Override
public boolean isEnabled(int position) {
return false;
}
@Override
public int getCount() {
return categories.size();
}
@Override
public List<Category> getItem(int position) {
return categories.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
CategoryRow row = (CategoryRow) convertView;
if (row == null) {
row = CategoryRow.create(parent, inflater);
}
row.init(type, categories.get(position));
cells.putAll(row.getCells());
return row;
}
}
}