无法显示列表视图。代码没有运行时错误也没有语法。我检查了我的数据库列/表名称不匹配。请提出可能的错误建议。
package com.example.doctor;
import java.util.ArrayList;
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class Details extends ListActivity {
public String name;
public String table;
private ArrayList<String> details = new ArrayList<String>();
private SQLiteDatabase db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_details);
Intent intent = getIntent();
name = intent.getStringExtra(Viewlist.column);
table = intent.getStringExtra(Viewlist.table_two);
openAndQueryDatabase();
displayResultList();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.details, menu);
return true;
}
public void displayResultList() {
TextView tView = new TextView(this);
tView.setText("Details for the selected are as follow :");
getListView().addHeaderView(tView);
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, details));
getListView().setTextFilterEnabled(true);
}
public void openAndQueryDatabase() {
try {
db = openOrCreateDatabase( "mydatabase.db", SQLiteDatabase.CREATE_IF_NECESSARY , null );
Cursor cursor = db.rawQuery("select * from "+ table + " where name='"+ name + "'", null);
int count = cursor.getColumnCount();
if (cursor!=null )
{
if (cursor.moveToFirst())
{
do
{
for (int i =0 ; i< count; i++)
{
String data = cursor.getString(i);
details.add(data);
}
}
while (cursor.moveToNext());
}
}
}
catch (SQLiteException se )
{
Log.e(getClass().getSimpleName(), "Error in the code");
}
finally
{
db.close();
}
}
}