在我的应用程序中,我有标签菜单:添加标签,查看标签。
在“添加”选项卡中:我将数据添加到数据库 在“视图”选项卡中:我从数据库中选择数据到listview
现在我有问题:当我从添加标签添加数据并切换到viewtab时,我无法查看上次添加到数据库中,但如果我关闭应用并打开新的时间,我可以最后添加
请解决这个问题的任何想法
代码:
`查看标签代码:
公共类ViewEvents扩展了Activity {
DBAdapter DB=new DBAdapter(this);
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.viewevents);
final ListView myListView = (ListView)findViewById(R.id.MyList);
// final EditText myEditText = (EditText)findViewById(R.id.myEditText);
// Create the array list of to do items
final ArrayList<String> todoItems = new ArrayList<String>();
final ArrayAdapter<String> aa = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, todoItems);
DB.open();
Cursor c=DB.select();
c.moveToFirst();
Integer n=new Integer(c.getCount());
for(int i=0;i<c.getCount();i++)
{
todoItems.add(0, c.getString(0));
c.moveToNext();
}
// todoItems.add(0, c.getString(0));
aa.notifyDataSetChanged();
myListView.setAdapter(aa);
}
添加标签代码:
public View getView(int position,View convertView,ViewGroup parent){
ButtonHolder holder2;
if (convertView == null) {
holder2 = new ButtonHolder();
convertView = mInflater.inflate(R.layout.item, null);
holder2.caption = (Button) convertView.findViewById(R.id.Bte);
convertView.setTag(holder2);
} else {
holder2 = (ButtonHolder) convertView.getTag();
}
holder2.caption.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
TextView names = holderpartner.caption;
TextView date = holderdv.caption;
TextView time = holderviewmtime.caption;
String address = "sdfgkhj";
event e=new event( names.getText().toString(), address,date.getText().toString(), new java.sql.Time(9, 30, 30));
DB.open();
DB.insertTask(e);
date.setText("");
time.setText("");
Toast.makeText(getBaseContext(), "Done",Toast.LENGTH_LONG).show();
}
});`
答案 0 :(得分:1)
在addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
中为您的意图添加TabHostActivity
标记,因此每当您选择标签时,其内容都会刷新。做类似的事情:
intent = new Intent().setClass(this, Notices.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
spec = tabHost.newTabSpec("notices").setIndicator(getString(R.string.notices),
res.getDrawable(R.drawable.ic_tab_notices))
.setContent(intent);
tabHost.addTab(spec);
在我的情况下,它正在发挥作用。