最下面有程式碼下載分享
1.初始化控制項：創建一個Model class 來記住值
我客製化的Listview 有 TextView 及 CheckBox
Model.java
public class ModelBean {
private String name;
private boolean selected;
public ModelBean(String name) {
this.name = name;
}
public String getName() {
return name;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
2.實作
RecyclerView 的作法
MainActivity.java
public class MainActivity extends Activity{
public ListView list_service;
private RecyclerView mRecyclerView;
private RecyclerView.LayoutManager mLayoutManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
mRecyclerView = (RecyclerView)findViewById(R.id.recycle_list);
// use this setting to improve performance if you know that changes
// in content do not change the layout size of the RecyclerView
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
RecycleAdapter adapter = new RecycleAdapter(getContext(),getModel());
mRecyclerView.setAdapter(adapter);
}
private List<ModelBean> getModel() {
list.add(new ModelBean("Linux"));
list.add(new ModelBean("Windows7"));
list.add(new ModelBean("Suse"));
list.add(new ModelBean("Eclipse"));
list.add(new ModelBean("Ubuntu"));
list.add(new ModelBean("Solaris"));
list.add(new ModelBean("Android"));
list.add(new ModelBean("iPhone"));
list.add(new ModelBean("Java"));
list.add(new ModelBean(".Net"));
list.add(new ModelBean("PHP"));
list.add(new ModelBean("ios"));
return list;
}
private class RecycleAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
private List<ModelBean> mlist;
private LayoutInflater mLayoutInflater;
public RecycleAdapter(Context context, List<ModelBean> list) {
this.mlist = list;
mLayoutInflater = LayoutInflater.from(context);
}
public class ViewHolder0 extends RecyclerView.ViewHolder {
TextView tv_content;
CheckBox cb;
public ViewHolder0(View itemView) {
super(itemView);
tv_content = (TextView)itemView.findViewById(R.id.service_content);
cb = (CheckBox)itemView.findViewById(R.id.cb_service);
}
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if(viewType == 0){
View v = mLayoutInflater.inflate(R.layout.service_list, parent, false);
return new ViewHolder0(v);
}
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {
if (holder instanceof ViewHolder0){
((ViewHolder0)holder).tv_content.setText(mlist.get(position).getName());
//in some cases, it will prevent unwanted situations
((ViewHolder0)holder).cb.setOnCheckedChangeListener(null);
//if true, your checkbox will be selected, else unselected
((ViewHolder0)holder).cb.setChecked(mlist.get(position).isSelected());
((ViewHolder0)holder).cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener()
{
@Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{ mlist.get(holder.getAdapterPosition()).setSelected(isChecked);}
});
}
}
@Override
public int getItemCount() {
return mlist.size();
}
@Override
public int getItemViewType(int position) {
return 0;
}
}
}
ListView 作法
MyAdapter.java
public class MyAdapter extends ArrayAdapter<Model> {
private final List<Model> list;
private final Activity context;
boolean checkAll_flag = false;
boolean checkItem_flag = false;
public MyAdapter(Activity context, List<Model> list) {
super(context, R.layout.row, list);
this.context = context;
this.list = list;
}
static class ViewHolder {
protected TextView text;
protected CheckBox checkbox;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if (convertView == null) {
LayoutInflater inflator = context.getLayoutInflater();
convertView = inflator.inflate(R.layout.row, null);
viewHolder = new ViewHolder();
viewHolder.text = (TextView) convertView.findViewById(R.id.label);
viewHolder.checkbox = (CheckBox) convertView.findViewById(R.id.check);
viewHolder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag(); // Here we get the position that we have set for the checkbox using setTag.
list.get(getPosition).setSelected(buttonView.isChecked()); // Set the value of checkbox to maintain its state.
}
});
convertView.setTag(viewHolder);
convertView.setTag(R.id.label, viewHolder.text);
convertView.setTag(R.id.check, viewHolder.checkbox);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.checkbox.setTag(position); // This line is important.
viewHolder.text.setText(list.get(position).getName());
viewHolder.checkbox.setChecked(list.get(position).isSelected());
return convertView;
}
}
MainActivity.java
public class MainActivity extends Activity implements OnItemClickListener{
ListView listView;
ArrayAdapter<Model> adapter;
List<Model> list = new ArrayList<Model>();
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
listView = (ListView) findViewById(R.id.my_list);
adapter = new MyAdapter(this,getModel());
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
}
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) {
TextView label = (TextView) v.getTag(R.id.label);
CheckBox checkbox = (CheckBox) v.getTag(R.id.check);
Toast.makeText(v.getContext(), label.getText().toString()+" "+isCheckedOrNot(checkbox), Toast.LENGTH_LONG).show();
}
private String isCheckedOrNot(CheckBox checkbox) {
if(checkbox.isChecked())
return "is checked";
else
return "is not checked";
}
private List<Model> getModel() {
list.add(new Model("Linux"));
list.add(new Model("Windows7"));
list.add(new Model("Suse"));
list.add(new Model("Eclipse"));
list.add(new Model("Ubuntu"));
list.add(new Model("Solaris"));
list.add(new Model("Android"));
list.add(new Model("iPhone"));
list.add(new Model("Java"));
list.add(new Model(".Net"));
list.add(new Model("PHP"));
list.add(new Model("ios"));
return list;
}
}
仔細看程式碼會發現不管是ListView或RecyclerView在ViewHolder裡除了一開始的findview以外，
就是從初始過後的Model要值，然後值有變就會儲存在Model裡，當被回收又再次從緩存裡拿出來
變會從Model裡拿值。
附上ListView程式碼
https://github.com/andy086912597/ListViewCheckBox
歡迎大家有問題互相討論
references
http://blog.csdn.net/guolin_blog/article/details/44996879
https://dev.qq.com/topic/5811d3e3ab10c62013697408
http://stackoverflow.com/questions/32427889/checkbox-in-recyclerview-keeps-on-checking-different-items
http://lalit3686.blogspot.tw/2012/06/today-i-am-going-to-show-how-to-deal.html
