我正在开发名为Stock Manager的小应用程序。我想将所有行详细信息返回到listview。但我只收到最后一行详细信息。
检查此数据库文件DataBaseHandler.java
package com.example.stockmanager;
import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DataBaseHandler extends SQLiteOpenHelper{
private SQLiteDatabase sql=null;
private static String CREATE_TABLE="";
public DataBaseHandler(Context context)
{
super(context, Util.DATABASE_NAME, null, Util.DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
CREATE_TABLE = "CREATE TABLE " +Util.STOCK_TABLE + "("
+Util.USER_ID +" INTEGER PRIMARY KEY AUTOINCREMENT, "
+Util.CURRENT_STOCK +" TEXT NOT NULL, "
+Util.DATE +" TEXT NOT NULL, "
+Util.TIME +" TEXT NOT NULL" + ")";
db.execSQL(CREATE_TABLE);
Log.i("Authentication", ""+CREATE_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " +Util.STOCK_TABLE);
}
public void insertDetails(Model m)
{
sql=this.getWritableDatabase();
ContentValues cn=new ContentValues();
cn.put(Util.CURRENT_STOCK, m.getCurrentStock().toString());
cn.put(Util.DATE, m.getDate().toString());
cn.put(Util.TIME, m.getTime().toString());
long insertId=sql.insert(Util.STOCK_TABLE, null, cn);
Log.i("new raw inserted", ""+insertId);
}
public List<Model> getAllDetails()
{
List<Model> show=new ArrayList<Model>();
sql=this.getReadableDatabase();
Cursor cursor=null;
/*String query="SELECT * FROM " +Util.STOCK_TABLE+" ORDER BY "+Util.USER_ID+" ASC";
cursor=sql.rawQuery(query, null);*/
cursor=sql.query(Util.STOCK_TABLE, new String[] {Util.CURRENT_STOCK,Util.DATE,Util.TIME}, null, null, null, null, null);
cursor.moveToFirst();
while(!cursor.isAfterLast())
{
Model m=new Model();
m.setCurrentStock(cursor.getString(0));
m.setDate(cursor.getString(1));
m.setTime(cursor.getString(2));
show.add(m);
cursor.moveToNext();
}
cursor.close();
sql.close();
return show;
}
public String getLastStock()
{
sql=this.getWritableDatabase();
Cursor cursor;
String q="SELECT "+Util.CURRENT_STOCK+" FROM "+Util.STOCK_TABLE+" ORDER BY " +Util.USER_ID+" DESC LIMIT 1";
cursor=sql.rawQuery(q, null);
String stock = null;
if(cursor.moveToFirst())
stock=cursor.getString(0);
return stock;
}
}
检查此java文件History.java
package com.example.stockmanager;
import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
public class History extends Activity {
private ListView lst;
private Adaptar aa;
private ArrayList<String> array_stock;
private ArrayList<String> array_date;
private ArrayList<String> array_time;
private DataBaseHandler data;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_history);
lst=(ListView)findViewById(R.id.listView1);
data=new DataBaseHandler(getApplicationContext());
try
{
List<Model> ls=data.getAllDetails();
array_stock = new ArrayList<String>(ls.size());
array_date = new ArrayList<String>(ls.size());
array_time = new ArrayList<String>(ls.size());
Log.i("Size", ""+array_stock);
for(int i=0;i<ls.size();i++)
{
Model m=ls.get(i);
String stock=m.getCurrentStock();
String date=m.getDate();
String time=m.getTime();
Log.i("Stock", ""+stock);
Log.i("date", ""+date);
Log.i("time", ""+time);
array_stock.add(stock);
array_date.add(date);
array_time.add(time);
}
aa=new Adaptar(this,ls);
lst.setAdapter(aa);
/*lst.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View rowView, int positon,long id) {
Toast.makeText(rowView.getContext(), ""+positon, Toast.LENGTH_LONG).show();
removeListItem(rowView,positon);
}
});*/
}
catch(Exception e)
{
e.printStackTrace();
}
}
/*protected void removeListItem(View rowView, final int positon) {
final Animation animation = AnimationUtils.loadAnimation(History.this,android.R.anim.slide_out_right);
rowView.startAnimation(animation);
Handler handle = new Handler();
handle.postDelayed(new Runnable() {
@Override
public void run() {
array_stock.remove(positon);
array_date.remove(positon);
array_time.remove(positon);
aa.notifyDataSetChanged();
animation.cancel();
}
},1000);
}
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.history, menu);
return true;
}
}
检查此adaptar类Adaptar.java
package com.example.stockmanager;
import java.util.List;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.TextView;
public class Adaptar extends ArrayAdapter<Model> implements ListAdapter{
private List<Model> lsadd;
private LayoutInflater inflator;
public Adaptar(History history, List<Model> ls) {
// TODO Auto-generated constructor stub
super(history, R.layout.row, ls);
this.lsadd=ls;
inflator=history.getLayoutInflater();
}
static class ViewHolder
{
protected TextView stock;
protected TextView date;
protected TextView time;
}
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
ViewHolder viewholder=null;
final int temposition= arg0;
if(arg1==null)
{
arg1=inflator.inflate(R.layout.row, null);
viewholder=new ViewHolder();
viewholder.stock=(TextView)arg1.findViewById(R.id.t2);
viewholder.date=(TextView)arg1.findViewById(R.id.t3);
viewholder.time=(TextView)arg1.findViewById(R.id.t4);
arg1.setTag(viewholder);
arg1.setTag(R.id.t2, viewholder.stock);
arg1.setTag(R.id.t3, viewholder.date);
arg1.setTag(R.id.t4, viewholder.time);
}
else
{
viewholder=(ViewHolder)arg1.getTag();
}
viewholder.stock.setText(lsadd.get(temposition).getCurrentStock());
viewholder.date.setText(lsadd.get(temposition).getDate());
viewholder.time.setText(lsadd.get(temposition).getTime());
return arg1;
}
}
logcat的
03-23 11:15:43.080: I/Checking(1167): com.example.stockmanager.Model@b2da59b0
03-23 11:15:43.090: I/Checking(1167): com.example.stockmanager.Model@b2d8fe48
03-23 11:15:43.090: I/Checking(1167): com.example.stockmanager.Model@b2da7e20
03-23 11:15:43.090: I/Checking(1167): com.example.stockmanager.Model@b2d87cf8
03-23 11:15:43.090: I/Size(1167): []
03-23 11:15:43.090: I/Stock(1167): 106
03-23 11:15:43.090: I/date(1167): 23-3-2015
03-23 11:15:43.090: I/time(1167): 11:12:13
03-23 11:15:43.090: I/Stock(1167): 106
03-23 11:15:43.090: I/date(1167): 23-3-2015
03-23 11:15:43.090: I/time(1167): 11:12:13
03-23 11:15:43.090: I/Stock(1167): 106
03-23 11:15:43.090: I/date(1167): 23-3-2015
03-23 11:15:43.090: I/time(1167): 11:12:13
03-23 11:15:43.090: I/Stock(1167): 106
03-23 11:15:43.090: I/date(1167): 23-3-2015
03-23 11:15:43.090: I/time(1167): 11:12:13
我的数据库
user_id current_stock date time
1 50 24-3-2015 1:58:22
2 100 24-3-2015 1:58:26
3 150 24-3-2015 1:58:29
4 200 24-3-2015 1:58:36
5 195 24-3-2015 1:58:41
6 245 24-3-2015 1:58:49
答案 0 :(得分：0)
在您的适配器中，您不会覆盖方法getCount，因为：
@Override
public int getCount() {
return lsadd.size();
}
删除这些行：
arg1.setTag(R.id.t2, viewholder.stock);
arg1.setTag(R.id.t3, viewholder.date);
arg1.setTag(R.id.t4, viewholder.time);
答案 1 :(得分：0)
在get allDetails方法中尝试此示例：
SQLiteDatabase db = this.getReadableDatabase();
Cursor res = db.rawQuery( "select * from contacts", null );
res.moveToFirst();
while(res.isAfterLast() == false){
array_list.add(res.getString(res.getColumnIndex(CONTACTS_COLUMN_NAME)));
res.moveToNext();
}