先生，我如何使用baseadapter刷新我的自定义列表视图。我不知道放置什么，或者将它放在我的代码中。请帮我。提前致谢
public class EditDetails extends Activity{
public String nameChanged;
public String numChanged;
public String name;
public String num;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.editdetails);
final EditText sqlName = (EditText)findViewById(R.id.editName);
final EditText sqlNumber = (EditText)findViewById(R.id.editNumber);
name = CustomListView.name;
num = CustomListView.number;
Button bUpdate = (Button)findViewById(R.id.editUpdate);
Button bView = (Button)findViewById(R.id.editView);
sqlName.setText(name);
sqlNumber.setText(num);
bUpdate.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
nameChanged = sqlName.getText().toString();
numChanged = sqlNumber.getText().toString();
GroupDb info = new GroupDb(EditDetails.this);
info.open();
long rowid = info.getRowId(name, num);
info.updateNameNumber(rowid, nameChanged, numChanged);
ArrayList<Contact> searchResults = info.getView();
MyCustomBaseAdapter mcba = new MyCustomBaseAdapter(EditDetails.this, searchResults);
Toast.makeText(getApplicationContext(), "Update Successful!", Toast.LENGTH_LONG).show();
info.close();
}
});
bView.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent();
intent.setClass(EditDetails.this, CustomListView.class);
startActivityForResult(intent, 0);
}
});
}
}
这是我显示我的列表视图的地方
public class CustomListView extends Activity {
final Context context = this;
public static String name;
public static String number;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GroupDb info = new GroupDb(this);
info.open();
ArrayList<Contact> searchResults = info.getView();
final ListView lv = (ListView) findViewById(R.id.srListView);
lv.setAdapter(new MyCustomBaseAdapter(this, searchResults));
info.close();
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
// TODO Auto-generated method stub
Object o = lv.getItemAtPosition(position);
final Contact fullObject = (Contact)o;
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
alertDialogBuilder
.setMessage("Select action")
.setCancelable(false)
.setPositiveButton("Edit", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
Toast.makeText(getApplicationContext(), "Edit ", Toast.LENGTH_LONG).show();
name = fullObject.getName();
number = fullObject.getPhoneNumber();
Intent contactIntent = new Intent("myfolder.proj.EDITDETAILS");
startActivity(contactIntent);
}
})
这是我的baseadapter类
public class MyCustomBaseAdapter extends BaseAdapter {
private static ArrayList<Contact> searchArrayList;
private LayoutInflater mInflater;
public MyCustomBaseAdapter(Context context, ArrayList<Contact> results) {
searchArrayList = results;
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return searchArrayList.size();
}
public Object getItem(int position) {
return searchArrayList.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.custom_row_view, null);
holder = new ViewHolder();
holder.txtName = (TextView) convertView.findViewById(R.id.name);
holder.txtPhone = (TextView) convertView.findViewById(R.id.phone);
holder.status = (TextView) convertView.findViewById(R.id.status);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtName.setText(searchArrayList.get(position).getName());
holder.txtPhone.setText(searchArrayList.get(position).getPhoneNumber());
holder.status.setText(searchArrayList.get(position).getStatus());
return convertView;
}
static class ViewHolder {
TextView txtName;
TextView txtPhone;
TextView status;
}
}
两个选项：要么保留传入构造函数的ArrayList的引用，以便稍后修改实际列表数据（因为列表未复制，修改适配器外部的数据仍然会更新适配器引用的指针） ，或重写适配器以允许列表重置为另一个对象。
在任何一种情况下，在ArrayList发生变化之后，你必须调用notifyDataSetChanged()来更新你的ListView。这可以在适配器内部或外部完成。所以，例如：
public class MyCustomBaseAdapter extends BaseAdapter {
//TIP: Don't make this static, that's just a bad idea
private ArrayList<Contact> searchArrayList;
private LayoutInflater mInflater;
public MyCustomBaseAdapter(Context context, ArrayList<Contact> initialResults) {
searchArrayList = initialResults;
mInflater = LayoutInflater.from(context);
}
public void updateResults(ArrayList<Contact> results) {
searchArrayList = results;
//Triggers the list update
notifyDataSetChanged();
}
/* ...The rest of your code that I failed to copy over... */
}
HTH
在BaseAdapter中创建一个自定义方法
喜欢：
public void updateAdapter(ArrayList<Contact> arrylst) {
this.arrylst= arrylst;
//and call notifyDataSetChanged
notifyDataSetChanged();
}
这个函数调用你想要调用的地方：例如
adapterObject.updateAdapter（这里传递ArrayList）;
完成。
谢谢以上解决方案的人为我工作。我在每个事件中调用listupdate方法
public void updateResults(List<TalebeDataUser> results) {
talebeList = results;
//Triggers the list update
notifyDataSetChanged();
}
更新列表后，我还会在每次触摸时刷新我的按钮操作。例如，我在listview项目中有很多按钮可以点击，所以每次触摸都会改变其他风格
private void setColor(TalebeDataUser talebeDataUser) {
if (talebeDataUser.isVar()) {
holder.mVar.setBackgroundResource(R.drawable.aw_secili);
holder.mGorevli.setBackgroundResource(R.drawable.aw_shadow);
holder.mYok.setBackgroundResource(R.drawable.aw_shadow);
holder.mIzinli.setBackgroundResource(R.drawable.aw_shadow);
holder.mHatimde.setBackgroundResource(R.drawable.aw_shadow);
} else if (talebeDataUser.isGorevli()) {
holder.mVar.setBackgroundResource(R.drawable.aw_shadow);
holder.mGorevli.setBackgroundResource(R.drawable.aw_secili);
holder.mYok.setBackgroundResource(R.drawable.aw_shadow);
holder.mIzinli.setBackgroundResource(R.drawable.aw_shadow);
holder.mHatimde.setBackgroundResource(R.drawable.aw_shadow);
} else if (talebeDataUser.isYok()) {
holder.mVar.setBackgroundResource(R.drawable.aw_shadow);
holder.mGorevli.setBackgroundResource(R.drawable.aw_shadow);
holder.mYok.setBackgroundResource(R.drawable.aw_secili);
holder.mIzinli.setBackgroundResource(R.drawable.aw_shadow);
holder.mHatimde.setBackgroundResource(R.drawable.aw_shadow);
} else if (talebeDataUser.isIzinli()) {
holder.mVar.setBackgroundResource(R.drawable.aw_shadow);
holder.mGorevli.setBackgroundResource(R.drawable.aw_shadow);
holder.mYok.setBackgroundResource(R.drawable.aw_shadow);
holder.mIzinli.setBackgroundResource(R.drawable.aw_secili);
holder.mHatimde.setBackgroundResource(R.drawable.aw_shadow);
} else if (talebeDataUser.isHatimde()) {
holder.mVar.setBackgroundResource(R.drawable.aw_shadow);
holder.mGorevli.setBackgroundResource(R.drawable.aw_shadow);
holder.mYok.setBackgroundResource(R.drawable.aw_shadow);
holder.mIzinli.setBackgroundResource(R.drawable.aw_shadow);
holder.mHatimde.setBackgroundResource(R.drawable.aw_secili);
}
}
只是我的一个按钮内的一个例子
holder.mYok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//talebeList.remove(currentTalebe);
setOgrenciNameByDurum(talebeList.get(i));
talebeList.get(i).setYok(true);
//setOgrenciNameByDurum(currentTalebe);
talebeList.get(i).setVar(false);
talebeList.get(i).setGorevli(false);
talebeList.get(i).setIzinli(false);
talebeList.get(i).setHatimde(false);
updateResults(talebeList);
setColor(talebeList.get(i));
//saveCurrentTalebeOnShare(currentTalebe);
}
});
talebeList只是List<MyModel> talebeList
我解决了这个问题，将此功能添加到我的自定义适配器
public void newCursor(Cursor cursor)
{
this.cursor=cursor;
this.notifyDataSetChanged();
}
从我的主类我创建一个新的游标，重新查询数据库，然后通过此函数发送到我的自定义适配器。
祝好运
只需使用BaseAdapter，无需使用上下文
listsOfNotes.remove(listsOfNotes.get(position));
notifyDataSetChanged();
只需将此代码放在setOnClickListner上即可