如何在android中使用baseadapter刷新自定义列表视图

概述先生,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publicclassEditDetailsextendsActivity{publicStringnameChanged;publicStringnumChanged;publicStringname;publicStringnum;publicvoidonCreat

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;@OverrIDepublic 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;}}

解决方法:

两个选项：要么保留传递给构造函数的ArrayList的引用,以便稍后修改实际的列表数据(因为列表未复制,修改适配器外部的数据仍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发生更改后,您必须调用notifyDataSetChanged()以使用更改来更新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

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