是的，我知道这个问题已经问了很多，但似乎我检查的所有问题都不能解决我的问题。所以我会直奔主题。
这是数据库类
SQLHandler.java
public class SQLHandler {
public static final String KEY_ROOMMOVEHOLDER = "roommoveholder";
public static final String KEY_ROOM = "room";
public static final String KEY_ROOMWEIGHT = "roomweight";
public static final String KEY_MOVENAME = "movename";
public static final String KEY_ID1 = "_id";
public static final String KEY_ID2 = "_id";
public static final String KEY_MOVEDATE = "movedate";
public static final String KEY_TOTALMOVEWEIGHT = "totalmoveweight";
public static final String KEY_TOTALITEM = "totalitem";
private static final String DATABASE_NAME = "mymovingfriend";
private static final int DATABASE_VERSION = 1;
public static final String KEY_TODOMOVE = "todomove";
private static final String DATABASE_TABLE1 = "movingname";
private static final String DATABASE_TABLE2 = "movingrooms";
public static final String CREATE_TABLE_1 = "CREATE TABLE " + DATABASE_TABLE1 + " (" +
KEY_ID1 + " INTEGER PRIMARY KEY AUTOINCREMENT," +
KEY_MOVEDATE + " TEXT NOT NULL, " +
KEY_TOTALMOVEWEIGHT + " TEXT NOT NULL, " +
KEY_TOTALITEM + " INTEGER NOT NULL, " +
KEY_MOVENAME + " TEXT NOT NULL);";
public static final String CREATE_TABLE_2 = "CREATE TABLE " + DATABASE_TABLE2 + " (" +
KEY_ID2 + " INTEGER PRIMARY KEY AUTOINCREMENT," +
KEY_ROOMMOVEHOLDER + " TEXT NOT NULL, " +
KEY_ROOMWEIGHT + " TEXT NOT NULL, " +
KEY_ROOM + " TEXT NOT NULL);";
private DbHelper ourHelper;
private final Context ourContext;
private SQLiteDatabase ourDatabase;
private static class DbHelper extends SQLiteOpenHelper{
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(CREATE_TABLE_1);
db.execSQL(CREATE_TABLE_2);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldversion, int newversion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE1);
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE2);
onCreate(db);
}
}
public SQLHandler(Context c){
ourContext = c;
}
public SQLHandler open() throws SQLException{
ourHelper = new DbHelper(ourContext);
ourDatabase = ourHelper.getWritableDatabase();
return this;
}
public void close(){
ourHelper.close();
}
public void renameRoom(String movename, String roomname){
ContentValues cv = new ContentValues();
cv.put(KEY_ROOM, roomname);
ourDatabase.update(DATABASE_TABLE2, cv, KEY_ROOMMOVEHOLDER + "='" + movename + "'" + " AND " + KEY_ROOM + "='" + roomname + "'", null);
}
}
这是我的活动
开始移动.java
public class StartMoving extends Activity {
Button returnBack, addmove, set, setCancel;
SQLHandler startmoving;
EditText newMove;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.start_moving);
initializer();
itemInitializer();
Intent i = getIntent();
currentMove = i.getStringExtra("moveName");
buttonLoad();
currentMoveName.setText(currentMove);
currentRoom = "None";
roomName.setText(currentRoom);
buttonSet();
itemButton();
checktodo();
roomSpinner();
SharedPreferences tut_pref = PreferenceManager.getDefaultSharedPreferences(StartMoving.this);
btut = tut_pref.getString("gettut", "null");
if (btut.equals("yes")) {
AlertDialog help1 = new AlertDialog.Builder(StartMoving.this).show();
help1.setContentView(R.layout.add_room_tut);
next = true;
managehelp = true;
tut_pref = PreferenceManager.getDefaultSharedPreferences(StartMoving.this);
SharedPreferences.Editor tut = tut_pref.edit();
tut.putString("gettut", "no");
tut.commit();
}else {
}
}
private void buttonLoad() {
try {
ArrayList<String> sb = startmoving.loadRooms(currentMove);
String[] rb = (String[]) sb.toArray(new String[sb.size()]);
for (int i = 0; i < rb.length; i++) {
final Button nb = new Button(StartMoving.this);
nb.setText(rb[i]);
row.addView(nb);
nb.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
currentRoom = nb.getText().toString();
roomName.setText(currentRoom);
String displayname = startmoving.getItemName(currentMove, currentRoom);
String displayvalue = startmoving.getItemValue(currentMove, currentRoom);
String displayweight = startmoving.getItemWeightLBS(currentMove, currentRoom);
String displaytotalweight = startmoving.getTotalWeightLBS(currentMove);
String displayroomweight = startmoving.getRoomWeightLBS(currentMove, currentRoom);
int displaytotalitem = startmoving.getTotalItem(currentMove);
roomContent.setText(displayname);
itemValue.setText(displayvalue);
itemWeight.setText(displayweight);
totalweight.setText(displaytotalweight);
roomweight.setText(displayroomweight);
totalitem.setText("" + displaytotalitem);
}
});
}
addRooms.addView(row);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void initializer() {
startmoving = new SQLHandler(StartMoving.this);
startmoving.open();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_main, menu);
return true;
}
@SuppressLint("SdCardPath")
@SuppressWarnings({ "deprecation" })
@Override
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);
boolean retval = true;
switch (item.getItemId()) {
case R.id.menu_rename:
final View view;
LayoutInflater inf = LayoutInflater.from(StartMoving.this);
view = inf.inflate(R.layout.rename, null);
final EditText newname = (EditText) view.findViewById(R.id.etNewRoomName);
new AlertDialog.Builder(StartMoving.this)
.setView(view)
.setTitle("Rename")
.setMessage("Enter new name for room " + currentRoom)
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
if (currentRoom.equals(newname.getText().toString())) {
Toast.makeText(StartMoving.this, "This name is already present. Please enter another name", Toast.LENGTH_LONG).show();
}else{
try {
String newroomname = newname.getText().toString();
startmoving.renameRoom(currentMove, newroomname);
// Intent intent = getIntent();
// finish();
// startActivity(intent);
} catch (Exception e) {
String error = e.toString();
Toast.makeText(StartMoving.this, error, Toast.LENGTH_SHORT).show();
}
}
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
})
.show();
break;
default:
break;
}
return retval;
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
startmoving.close();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
// TODO Auto-generated method stub
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onRestoreInstanceState(savedInstanceState);
roomName.setText("Hello world");
}
public void onBackPressed(){
super.onBackPressed();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
// do something on back.
if (check == 1) {
merge.setVisibility(View.GONE);
main.setVisibility(View.VISIBLE);
check = 0;
}else if (check == 2) {
main.setVisibility(View.VISIBLE);
roomButtons.setVisibility(View.GONE);
check = 0;
}else {
// this.finish();
Intent i = new Intent(StartMoving.this, ListMovingNames.class);
startActivity(i);
}
return true;
}
return super.onKeyDown(keyCode, event);
}
}
谁能指出我做错了什么？