假设如下:如何处理来自搜索管理器的回调?
Activity A calls Search Manager
User searches, and search results are displayed in Activity B
User clicks on a list item in Activity B
App switches back to Activity A
我无法处理来自活动B回调到活动A,因为我没有搜索管理意图(我想?)。
呼叫查找管理器(在活动A)
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.add_symbol:
onSearchRequested(); //result of search will show Activity B
return true;
default:
return super.onOptionsItemSelected(item);
}
}
回到活动的用户已经选择了一个列表项
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
Quote myQuote = new Quote();
myQuote.name = (companies.get(position).name);
myQuote.symbol = (companies.get(position).symbol);
//TODO: add new quote to master quote list in Main
//TODO: serialize in Main
//TODO: go back to last activity
Intent myIntent = new Intent(getApplicationContext(), Main.class);
startActivityForResult(myIntent, PICK_COMPANY_REQUEST);
}
});
后,在活动A处理回调:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PICK_COMPANY_REQUEST) {
if (resultCode == RESULT_OK) {
Toast toast = Toast.makeText(getApplicationContext(), "Stock added", Toast.LENGTH_SHORT);
toast.show();
}
}
}
PICK_COMPANY_REQUEST
从不发送回电话。为什么是这样?我假设,因为搜索管理器有意图,而不是活动B.我怎样才能确保这被调用?
onActivityResult()永远不会被调用。为什么?
问题是,onActivityResult()永远不会被调用。即使我尝试你的setResult()代码。 – 2010-08-30 17:34:42
此问题是否已解决,或者您是否仍然有问题。在使用setResult之后,您是否还完成了()当前的Activity而不调用Activity A的意图? – DeRagan 2010-08-31 04:50:56