我在尝试将数据从SQLite DB传递到下一个活动时遇到了问题。
这是我的.java
public class TimsFavs extends ListActivity implements OnItemClickListener {
/** Called when the activity is first created. */
ArrayList<String> results = new ArrayList<String>();
String col0,col1,col2,col3,col4,col5,col6,col7;
// Database results
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.timsfavs);
DBAdapter db = new DBAdapter(this);
//---get all Locations---
db.open();
Cursor c = db.getAllLocation();
if (c.moveToFirst())
{
do {
col0 = c.getString(c.getColumnIndex(DBAdapter.KEY_ROWID));
col1 = c.getString(1);
col2 = c.getString(2);
col3 = c.getString(3);
col4 = c.getString(4);
col5 = c.getString(5);
col6 = c.getString(6);
col7 = c.getString(7);
results.add(col2);
} while (c.moveToNext());
}
db.close();
setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,results));
ListView lv;
lv = getListView();
lv.setTextFilterEnabled(true);
lv.setBackgroundColor(Color.rgb(83, 05, 14));
lv.setOnItemClickListener((OnItemClickListener) this);
}
public void onItemClick(AdapterView<?> TimsFavs, View view, int position, long id) {
Intent i = new Intent(getApplicationContext(), TimsFavsMore.class);
i.putExtra("ct_id_pass", col0);
i.putExtra("ct_storeid_pass", col1);
i.putExtra("ct_address_pass", results.get(position));
i.putExtra("ct_city_pass", col3);
i.putExtra("ct_province_pass", col4);
i.putExtra("ct_country_pass", col5);
i.putExtra("ct_pcode_pass", col6);
i.putExtra("ct_phnum_pass", col7);
startActivity(i);
finish();
}
}
这是我的其他2个文件
DBAdapter.java
public class DBAdapter
{
public static final String KEY_ROWID = "_id";
public static final String KEY_PHONE = "phone";
public static final String KEY_STNUMBER = "stnumber";
public static final String KEY_ADDRESS = "address";
public static final String KEY_CITY = "city";
public static final String KEY_PROVINCE = "province";
public static final String KEY_COUNTRY = "country";
public static final String KEY_PCODE = "pcode";
private static final String TAG = "DBAdapter";
private static final String DATABASE_NAME = "timsfavs";
private static final String DATABASE_TABLE = "location";
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_CREATE =
"create table location (_id integer primary key autoincrement, "
+ "phone text not null, stnumber text not null, "
+ "address text not null, city text not null, "
+ "province text not null, country text not null, "
+ "pcode text not null);";
private final Context context;
private DatabaseHelper DBHelper;
private SQLiteDatabase db;
public DBAdapter(Context ctx)
{
this.context = ctx;
DBHelper = new DatabaseHelper(context);
}
private static class DatabaseHelper extends SQLiteOpenHelper
{
DatabaseHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion,
int newVersion)
{
Log.w(TAG, "Upgrading database from version " + oldVersion
+ " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS location");
onCreate(db);
}
}
//---opens the database---
public DBAdapter open() throws SQLException
{
db = DBHelper.getWritableDatabase();
return this;
}
//---closes the database---
public void close()
{
DBHelper.close();
}
//---insert a title into the database---
public long insertLocation(String phone, String stnumber, String address, String city, String province, String country, String pcode)
{
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_PHONE, phone);
initialValues.put(KEY_STNUMBER, stnumber);
initialValues.put(KEY_ADDRESS, address);
initialValues.put(KEY_CITY, city);
initialValues.put(KEY_PROVINCE, province);
initialValues.put(KEY_COUNTRY, country);
initialValues.put(KEY_PCODE, pcode);
return db.insert(DATABASE_TABLE, null, initialValues);
}
//---deletes a particular title---
public boolean deleteLocation(String rowId)
{
return db.delete(DATABASE_TABLE, KEY_ROWID +
"=" + rowId, null) > 0;
}
//---retrieves all the titles---
public Cursor getAllLocation()
{
return db.query(DATABASE_TABLE, new String[] {
KEY_ROWID,
KEY_PHONE,
KEY_STNUMBER,
KEY_ADDRESS,
KEY_CITY,
KEY_PROVINCE,
KEY_COUNTRY,
KEY_PCODE},
null,
null,
null,
null,
null);
}
//---retrieves a particular title---
public Cursor getLocation(long rowId) throws SQLException
{
Cursor mCursor =
db.query(true, DATABASE_TABLE, new String[] {
KEY_ROWID,
KEY_PHONE,
KEY_STNUMBER,
KEY_ADDRESS,
KEY_CITY,
KEY_PROVINCE,
KEY_COUNTRY,
KEY_PCODE
},
KEY_ROWID + "=" + rowId,
null,
null,
null,
null,
null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
//---updates a title---
public boolean updateLocation(long rowId, String phone,
String stnumber, String address, String city,
String province, String country, String pcode)
{
ContentValues args = new ContentValues();
args.put(KEY_PHONE, phone);
args.put(KEY_STNUMBER, stnumber);
args.put(KEY_ADDRESS, address);
args.put(KEY_CITY, city);
args.put(KEY_PROVINCE, province);
args.put(KEY_COUNTRY, country);
args.put(KEY_PCODE, pcode);
return db.update(DATABASE_TABLE, args,
KEY_ROWID + "=" + rowId, null) > 0;
}
}
TimsFavsMore.java
public class TimsFavsMore extends Activity {
DBAdapter db = new DBAdapter(this);
String rowId;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.timsfavsmore);
Intent i = getIntent();
Bundle b = i.getExtras();
final String rowId = b.getString("ct_id_pass");
final String phnum = b.getString("ct_phnum_pass");
final String storeid = b.getString("ct_storeid_pass");
final String address = b.getString("ct_address_pass");
final String city = b.getString("ct_city_pass");
final String province = b.getString("ct_province_pass");
final String country = b.getString("ct_country_pass");
final String pcode = b.getString("ct_pcode_pass");
TextView title = (TextView) findViewById(R.id.textview);
title.setText(Html.fromHtml("<br>Row ID: " + rowId + "<br><b><u>Location Address:</u></b><br><br>Store #" + storeid + "<br><br>" + address + "<br>" + city + ", " + province + "<br>" + country +"<br>" + pcode +"<br><br><b><u>Contact Info:</b></u><br><br>" + phnum +"<br>"));
// open to Nav
final Button button1 = (Button) findViewById(R.id.gohere);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String uri = "google.navigation:q=Tim%20Hortons,%20" + address + ",%20" + city + ",%20" + province + ",%20" + pcode + "";
Intent i2 = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
startActivity(i2);
}
});
// open to maps
final Button button2 = (Button) findViewById(R.id.showmap);
button2.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String uri2 = "geo:0,0?q=Tim%20Hortons,%20" + address + ",%20" + city + ",%20" + province + ",%20" + pcode + "";
Intent i3 = new Intent(Intent.ACTION_VIEW, Uri.parse(uri2));
startActivity(i3);
}
});
// Add to My Timmies List
final Button button3 = (Button) findViewById(R.id.removefav);
button3.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
//---add 2 SQLite---
db.open();
if (db.deleteLocation(rowId))
Toast.makeText(getApplicationContext(), " Delete successful.",
Toast.LENGTH_LONG).show();
else
Toast.makeText(getApplicationContext(), "Delete failed.",
Toast.LENGTH_LONG).show();
db.close();
Intent i = new Intent(getApplicationContext(), MyTimmies.class);
startActivity(i);
finish();
}
});
final Button button4 = (Button) findViewById(R.id.favsdone);
button4.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i4 = new Intent(getApplicationContext(), MyTimmies.class);
startActivity(i4);
finish();
}
});
}
}
答案 0 :(得分：0)
您的ListView数据是从Cursor中获取的，有一种更简单的方法可以使用SimpleCursorAdapter处理所有这些，这将从光标填充ListView，当您单击某个项目时它会让您知道单击项目的Cursor的哪一行来自。