如何通过两个不同的类具有不同参数的访问一个班? [英] How to access one class by two different classes with different parameters ?
问题描述
我不知道如何能实现这样的事情。
I wonder how can I achieve something like this.
在我MainActivity,我想打电话给 MyCustomBaseAdapter , getCount将
功能。
In my MainActivity, I want to call MyCustomBaseAdapter, getCount
function.
MainActivity
public class MainActivity extends AppCompatActivity {
InfoAPI sqlcon;
private SimpleCursorAdapter dataAdapter;
private SQLiteDatabase database;
private MyDatabaseHelper dbHelper;
private ListView listView;
TextView txtNoResult;
MyCustomBaseAdapter obj;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView=(ListView)findViewById(R.id.listView2);
txtNoResult=(TextView)findViewById(R.id.textView);
dbHelper = new MyDatabaseHelper(this);
sqlcon = new InfoAPI(this);
obj=new MyCustomBaseAdapter(this); // here the error
listView.setAdapter(obj);
int totalItem=obj.getCount(); // call getCount in MyCustomBaseAdapter
{
if (totalItem== 0) {
txtNoResult.setVisibility(View.GONE);
BuildList();
} else {
txtNoResult.setVisibility(View.VISIBLE);
listView.setVisibility(View.GONE);
}
}
在活动B,我需要访问的 MyCustomBaseAdapter 为好。正如你所看到的,我已经在活动B添加的页脚和页脚布局
In Activity B, I need to access MyCustomBaseAdapter as well. As you can see, I have added footer and footer layout in Activity B.
活动B
FrameLayout footerLayout;
AbsoluteLayout footer;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
listview = (ListView) findViewById(R.id.listView);
footer = (AbsoluteLayout) getLayoutInflater().inflate(R.layout.total_hours, null);
totalHours = (TextView) footer.findViewById(R.id.textView10);
footerLayout = (FrameLayout) getLayoutInflater().inflate(R.layout.under_list_view_button, null);
btnSubmit = (Button) footerLayout.findViewById(R.id.btnSave);
btnAddClaims = (Button) footerLayout.findViewById(R.id.addClaims);
objMyCustomBaseAdapter = new MyCustomBaseAdapter(getApplicationContext(), results, listview, footerLayout, footer);
listview.setAdapter(objMyCustomBaseAdapter);
btnSubmit.setOnClickListener(new View.OnClickListener() { // sumbit button is clicked
public void onClick(View arg0) {
Toast.makeText(getApplicationContext(), "Click", Toast.LENGTH_LONG).show();
first=objMyCustomBaseAdapter.getFistTime();
String[] first1 = first.split(":", 2);
last=objMyCustomBaseAdapter.getLastTime();
String[] last1=last.split(":",2);;
long a=ts.insertTimeSheet(name, weather, date, status,first1[1] , last1[1]);
WD.insertWorkDetails(results,a);
Intent intent=new Intent(getApplicationContext(),MainActivity.class);
startActivity(intent);
}
});
}
最后这 MyCustomBaseAdapter 类。
public class MyCustomBaseAdapter extends BaseAdapter{ // for ListView
private static ArrayList<SearchResults> searchArrayList;
FrameLayout footerLayout;
private LayoutInflater mInflater;
ListView listview;
AbsoluteLayout footer;
public MyCustomBaseAdapter(Context context, ArrayList<SearchResults> results,ListView listview,FrameLayout footerLayout,AbsoluteLayout footer) {
searchArrayList = results;
this.listview=listview;
this.footerLayout=footerLayout;
mInflater = LayoutInflater.from(context);
this.footer=footer;
addOrRemoveFooter();
}
public void addOrRemoveFooter(){
if(searchArrayList.size() == 0 && listview.getFooterViewsCount() > 0){
listview.removeFooterView(footer);
listview.removeFooterView(footerLayout);
}else if(listview.getFooterViewsCount() == 0 && searchArrayList.size()>0){
listview.addFooterView(footer);
listview.addFooterView(footerLayout);
}
}
public int getCount() {
return searchArrayList.size();
}
public String getFistTime() {
SearchResults firstTime = this.searchArrayList.get(0);
return firstTime.getTimeIn();
}
public String getLastTime() {
SearchResults lastTime = this.searchArrayList.get(searchArrayList.size() - 1);
return lastTime.getTimeOut();
}
我怎么能允许两个活动的机会的 MyCustomBaseAdapter 因为参数是不一样的?有人给我一个暗示吧。谢谢
How can I allow two activities access MyCustomBaseAdapter since the parameter are not the same ? Someone give me a hints please. Thanks
推荐答案
我建议你保存数组的大小在数据库和更新每次项目添加或删除列表。通过这种方式,你可以简单地得到你们的活动从数据库中值
I would suggest saving the size of your array in a database and update everytime items are added or removed from the list. This way, you can simply get the value from the database in your activities
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