我有一个包含以下列的数据库:
Book_name
,book_id
,chapter_number
,chapter_id
,line_number
,line_id
我正在使用此应用阅读书籍,选择要阅读的章节,然后显示所有行。
首先listview
显示所有图书,当用户选择图书名称时,它会传递book_id以显示该图书下的所有章节,在选择章节时,它会将chapter_id
传递给显示该章下的所有行。
我的问题是,当用户忙着阅读时,必须按后退按钮再次显示所有章节,然后选择下一章。我想在显示所有行的listview
上放一个按钮(在选择章节之后)供用户按,然后它应该基本上重新查询数据库以显示下一个可用章节。
每个listview
都在其自己的活动中,并且ID会通过Intents传递。
我不知道你们想看的代码,所以请问。
这是章节中DBHandler2
的列表:
public List<defineBybeldbAlles> getListHoofstuk(String boek_id_na_hoofstuk){
defineBybeldbAlles defineBybeldbHoofstuk = null;
List<defineBybeldbAlles> defineBybeldbAllesList = new ArrayList<>();
opendatabase();
Cursor cursor = mDatabase.rawQuery("SELECT * FROM PWLBybel WHERE " + COLUMN_BOEK_ID + " = '" + boek_id_na_hoofstuk + "'GROUP BY hoofstuk_id ORDER BY hoofstuk_id * 1 ASC", null);
cursor.moveToFirst();
while (!cursor.isAfterLast()){
defineBybeldbHoofstuk = new defineBybeldbAlles(cursor.getInt(0), cursor.getString(1),cursor.getString(2),cursor.getInt(3),cursor.getString(4),cursor.getInt(5),cursor.getString(6),cursor.getString(7),cursor.getInt(8),cursor.getString(9),cursor.getString(10));
defineBybeldbAllesList.add(defineBybeldbHoofstuk);
cursor.moveToNext();
}
cursor.close();
closeDatabase();
return defineBybeldbAllesList;
}
这是我传递我的章节活动中的chapter_id
,以显示线条活动中的行:
public void onItemClick (AdapterView<?> arg0, View view, int arg2, long arg3){
//on selecting a hoofstk
//BybelActivityVers will be launched to show verse inside
Intent hoofstukIntent = new Intent(BybelActivityHoofstuk.this,BybelActivityVers.class);
//send hoofstuk_id to VersActivity to get verse under that book
String hoofstuk_id_na_vers = ((TextView)view.findViewById(R.id.hoofstuk_id)).getText().toString();
hoofstukIntent.putExtra("hoofstuk_id", hoofstuk_id_na_vers);
String hoofstuk_nommer_na_vers = ((TextView)view.findViewById(R.id.custom_row_hoofstuktext)).getText().toString();
hoofstukIntent.putExtra("custom_row_hoofstuktext", hoofstuk_nommer_na_vers);
startActivity(hoofstukIntent);
}
});
现在这是DBHandler3
中列表的行:
public List<defineBybeldbAlles> getListVers(String hoofstuk_id_na_vers){
defineBybeldbAlles defineBybeldbVers = null;
List<defineBybeldbAlles> defineBybeldbVersList = new ArrayList<>();
opendatabase();
Cursor cursor = mDatabase.rawQuery("SELECT * FROM PWLBybel WHERE " + COLUMN_HOOFSTUK_ID + " = '" + hoofstuk_id_na_vers + "'GROUP BY vers_id ORDER BY vers_id * 1 ASC", null);
cursor.moveToFirst();
while (!cursor.isAfterLast()){
defineBybeldbVers = new defineBybeldbAlles(cursor.getInt(0), cursor.getString(1),cursor.getString(2),cursor.getInt(3),cursor.getString(4),cursor.getInt(5),cursor.getString(6),cursor.getString(7),cursor.getInt(8),cursor.getString(9),cursor.getString(10));
defineBybeldbVersList.add(defineBybeldbVers);
cursor.moveToNext();
}
cursor.close();
closeDatabase();
return defineBybeldbVersList;
}
答案 0 :(得分:0)
在当前章节中设置变量chapterid + 1以在intent中传递
然后Intent i = new intent(PARAMETERS);
finish();
startactivity(i);
然后使用db运行查询以获取新意图中新章节的详细信息
它的工作谢谢
答案 1 :(得分:0)
在你的问题中添加一个按钮。 检查列表是否滚动到最后
'
mListView.setOnScrollListener(new OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (mListView.getAdapter() == null)
return ;
if (mListView.getAdapter().getCount() == 0)
return ;
int l = visibleItemCount + firstVisibleItem;
if (l >= totalItemCount && !isLoading) {
// It is time to add new data. We call the listener
isLoading = true;
}
}
});
何时加载为true dat表示你的列表是最后一个
然后make nextbutton.setvisibility(View.Visible);
并点击按钮
得到你的章节ID并添加1 ,即下一章id
并启动intent并传递带有dat intent的章节和页面ID
Intent i = new Intent(this,Currentclass.java);
finish();
start activity(i);
//您的页面现在将被更改
请打个答案正确的谢谢:)