我尝试关于常量教程的 Commonsware教程
我修改活动
public class ConstantsBrowser extends ListActivity {
private LocationManager lm;
private LocationListener locListener;
private TextView latTxt, lonTxt;
Intent intent = null;
private static final int ADD_ID = Menu.FIRST+1;
private static final int DELETE_ID = Menu.FIRST+3;
private static final int UPDATE_ID = Menu.FIRST+4;
private static final int DETAIL_ID = Menu.FIRST+5;
public static final int SHOW_SUB_ACTIVITY_VIEW=3;
private DatabaseHelper db=null;
private Cursor constantsCursor=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.banner);
db=new DatabaseHelper(this);
constantsCursor=db
.getReadableDatabase()
.rawQuery("SELECT _ID, alamat, tglb "+
"FROM constants ORDER BY _ID",
null);
ListAdapter adapter=new SimpleCursorAdapter(this,
R.layout.row, constantsCursor,
new String[] {
DatabaseHelper.ID,
DatabaseHelper.ALAMAT,
DatabaseHelper.TANGGAL_AKHIR},
new int[] {R.id.id, R.id.alamat, R.id.tglakhir});
setListAdapter(adapter);
registerForContextMenu(getListView());
}
@Override
public void onDestroy() {
super.onDestroy();
constantsCursor.close();
db.close();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(Menu.NONE, ADD_ID, Menu.NONE, "Data Baru")
.setIcon(R.drawable.add)
.setAlphabeticShortcut('a');
return(super.onCreateOptionsMenu(menu));
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case ADD_ID:
add();
return(true);
}
return(super.onOptionsItemSelected(item));
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenu.ContextMenuInfo menuInfo) {
menu.add(Menu.NONE, DETAIL_ID, Menu.NONE, "Detail");
menu.add(Menu.NONE, DELETE_ID, Menu.NONE, "Delete");
menu.add(Menu.NONE, UPDATE_ID, Menu.NONE, "Update")
.setAlphabeticShortcut('d');
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case DETAIL_ID:
AdapterView.AdapterContextMenuInfo info=
(AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
detail(info.id);
return(true);
case DELETE_ID:
AdapterView.AdapterContextMenuInfo infoDetail=
(AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
delete(infoDetail.id);
return(true);
case UPDATE_ID:
intent = new Intent(ConstantsBrowser.this, MainActivity.class);
startActivityForResult(intent, SHOW_SUB_ACTIVITY_VIEW);
return(true);
}
return(super.onOptionsItemSelected(item));
}
private LocationManager lman;
private LocationListener locaListener;
private TextView latTxtt, lonTxtt;
private void add() {
LayoutInflater inflater=LayoutInflater.from(this);
View addView=inflater.inflate(R.layout.add_edit, null);
latTxtt = (TextView) addView.findViewById(R.id.latitudeTxtt);
lonTxtt = (TextView) addView.findViewById(R.id.longitudeTxtt);
lman = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locaListener = new MyLocationListenerDialog();
lman.requestLocationUpdates(LocationManager.GPS_PROVIDER, 10, 10,locaListener);
final DialogWrapper wrapper=new DialogWrapper(addView);
new AlertDialog.Builder(this)
.setTitle(R.string.add_title)
.setView(addView)
.setPositiveButton(R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
processAdd(wrapper);
}
})
.setNegativeButton(R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// ignore, just dismiss
}
})
.show();
}
private class MyLocationListenerDialog implements LocationListener {
@Override
public void onLocationChanged(Location loc) {
// TODO Auto-generated method stub
if (loc != null) {
latTxtt.setText(String.valueOf(loc.getLatitude()));
lonTxtt.setText(String.valueOf(loc.getLongitude()));
}
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
private void loadUser() {
EditText id = (EditText) findViewById(R.id.idDetail);
//View editTextHidden = (EditText) findViewById(R.id.txtHidden);
// database handler
DatabaseHelper db = new DatabaseHelper(getApplicationContext());
// Spinner Drop down elements
SQLiteDatabase dbs = db.getReadableDatabase();
Cursor cursor = dbs.rawQuery("SELECT * FROM constants", null);
if (cursor.moveToFirst()) {
do {
String username=cursor.getString(0); // Here you can get data from table and stored in string if it has only one string.
id.setText(username);
} while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
if(db!=null)
{
db.close();
}
// Creating adapter for spinner
}
private void detail(final long rowId) {
if (rowId>0) {
LayoutInflater inflater=LayoutInflater.from(this);
View addView=inflater.inflate(R.layout.detail_tetap, null);
loadUser();
final DialogWrapper wrapper=new DialogWrapper(addView);
new AlertDialog.Builder(this)
.setTitle(R.string.detail_title)
.setView(addView)
.setNegativeButton(R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// ignore, just dismiss
}
})
.show();
}
}
private void delete(final long rowId) {
if (rowId>0) {
new AlertDialog.Builder(this)
.setTitle(R.string.delete_title)
.setPositiveButton(R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
processDelete(rowId);
}
})
.setNegativeButton(R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// ignore, just dismiss
}
})
.show();
}
}
private void processAdd(DialogWrapper wrapper) {
ContentValues values=new ContentValues(2);
values.put(DatabaseHelper.CODE, wrapper.getCode());
values.put(DatabaseHelper.ALAMAT, wrapper.getAlamat());
values.put(DatabaseHelper.BATAS, wrapper.getBatas());
values.put(DatabaseHelper.LAT, wrapper.getLat());
values.put(DatabaseHelper.LON, wrapper.getLon());
values.put(DatabaseHelper.LUAS, wrapper.getLuas());
values.put(DatabaseHelper.TANGGAL_AWAL, wrapper.getTglA());
values.put(DatabaseHelper.TANGGAL_AKHIR, wrapper.getTglB());
db.getWritableDatabase().insert("constants", DatabaseHelper.ALAMAT, values);
constantsCursor.requery();
}
private void processDelete(long rowId) {
String[] args={String.valueOf(rowId)};
db.getWritableDatabase().delete("constants", "_ID=?", args);
constantsCursor.requery();
}
class DialogWrapper {
EditText codeField=null;
EditText alamatField=null;
EditText batasField=null;
EditText luasField=null;
EditText tglAField=null;
EditText tglBField=null;
TextView latField=null;
TextView lonField=null;
View base=null;
DialogWrapper(View base) {
this.base=base;
tglBField=(EditText)base.findViewById(R.id.tglakhir);
}
String getCode() {
return(getCodeField().getText().toString());
}
String getAlamat() {
return(getAlamatField().getText().toString());
}
String getBatas() {
return(getBatasField().getText().toString());
}
String getLuas() {
return(getLuasField().getText().toString());
}
String getTglA() {
return(getTglAField().getText().toString());
}
String getTglB() {
return(getTglBField().getText().toString());
}
String getLat() {
return(getLatField().getText().toString());
}
String getLon() {
return(getLonField().getText().toString());
}
private EditText getCodeField() {
if (codeField==null) {
codeField=(EditText)base.findViewById(R.id.code);
}
return(codeField);
}
private EditText getAlamatField() {
if (alamatField==null) {
alamatField=(EditText)base.findViewById(R.id.alamat);
}
return(alamatField);
}
private EditText getBatasField() {
if (batasField==null) {
batasField=(EditText)base.findViewById(R.id.batas);
}
return(batasField);
}
private TextView getLatField() {
if (latField==null) {
latField=(TextView)base.findViewById(R.id.latitudeTxtt);
}
return(latField);
}
private TextView getLonField() {
if (lonField==null) {
lonField=(TextView)base.findViewById(R.id.longitudeTxtt);
}
return(lonField);
}
private EditText getLuasField() {
if (luasField==null) {
luasField=(EditText)base.findViewById(R.id.luas);
}
return(luasField);
}
private EditText getTglAField() {
if (tglAField==null) {
tglAField=(EditText)base.findViewById(R.id.tglawal);
}
return(tglAField);
}
private EditText getTglBField() {
if (tglBField==null) {
tglBField=(EditText)base.findViewById(R.id.tglakhir);
}
return(tglBField);
}
}
}
当我尝试显示细节时，我使用此代码
private void loadUser() {
EditText id = (EditText) findViewById(R.id.idDetail);
//View editTextHidden = (EditText) findViewById(R.id.txtHidden);
// database handler
DatabaseHelper db = new DatabaseHelper(getApplicationContext());
// Spinner Drop down elements
SQLiteDatabase dbs = db.getReadableDatabase();
Cursor cursor = dbs.rawQuery("SELECT * FROM constants", null);
if (cursor.moveToFirst()) {
do {
String username=cursor.getString(0); // Here you can get data from table and stored in string if it has only one string.
id.setText(username);
} while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
if(db!=null)
{
db.close();
}
// Creating adapter for spinner
}
private void detail(final long rowId) {
if (rowId>0) {
LayoutInflater inflater=LayoutInflater.from(this);
View addView=inflater.inflate(R.layout.detail_tetap, null);
loadUser();
final DialogWrapper wrapper=new DialogWrapper(addView);
new AlertDialog.Builder(this)
.setTitle(R.string.detail_title)
.setView(addView)
.setNegativeButton(R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// ignore, just dismiss
}
})
.show();
}
}
我用一个编辑文本进行测试，但是当我启动应用程序时强制关闭。排队id.setText(username);
如何在sqlite中显示一些数据到alertDialog？
所以当我选择菜单detail()时对话框显示数据？
BR
亚历克斯