问题
I had gone through all the post regarding accessing data from database although I can't be able to solve my problem so I am posting my problem in this site. I want to access the SQL table which has been previously stored. My code works fine with storing of data but when I click on the save button but it is not working when I pressed on the Load button means it is inserting null values rather then stored values.
Here are my code..
public class SetValue extends Fragment {
@Override
public void onSaveInstanceState(Bundle outState) {
// TODO Auto-generated method stub
super.onSaveInstanceState(outState);
populateData();
}
Button save, Load;
EditText firstName, name, patientID, minH, maxH, minI, maxI, minB, maxB;
private String nameofP,FName,pID;
private String HRM,HRX,IBIM,IBIX,BRM,BRX;
private String nameET,firstNameET,pIDET;
private String minHET,maxHET,minIET,maxIET,minBET,maxBET;
Patient patient=new Patient();
@Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
populateData();
}
@SuppressWarnings("deprecation")
DatabaseHandler populateData() {
// TODO Auto-generated method stub
DatabaseHandler mDatabase= new DatabaseHandler(getActivity());
SQLiteDatabase sql=mDatabase.getReadableDatabase();
Cursor cursor = sql.query(mDatabase.NAME_TABLE, null, null, null, null, null, null);
getActivity().startManagingCursor(cursor);
while (cursor.moveToNext()) {
String cFirstname = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_NAME));
String cName = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_HR));
String cPID = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_IBI));
String cHeartRateMin = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_HMIN));
String cHeartRateMax = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_HMAX));
String cIBIMin = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_IMIN));
String cIBIMax = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_IMAX));
String cBreathingRateMin = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_BMIN));
String cBreathingRateMax = cursor.getString(cursor.getColumnIndex( mDatabase.KEY_BMAX));
Patient currentPatient= new Patient();
currentPatient.setName(cName);
currentPatient.setFirstName(cFirstname);
currentPatient.setId(cPID);
currentPatient.setNumHeartRateMin(cHeartRateMin);
currentPatient.setNumHeartRateMax(cHeartRateMax);
currentPatient.setNumInterBeatIntervalMin(cIBIMin);
currentPatient.setNumInterBeatIntervalMax(cIBIMax);
currentPatient.setNumBreathingrateMin(cBreathingRateMin);
currentPatient.setNumBreathingrateMax(cBreathingRateMax);
}
sql.close();
return mDatabase;
}
DatabaseHandler dbhandler = new DatabaseHandler(getActivity());
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
final View myFragmentView = inflater.inflate(
R.layout.set_value_fragment, container, false);
save = (Button) myFragmentView.findViewById(R.id.Save);
save.setOnClickListener(onClickSave(myFragmentView));
Load = (Button) myFragmentView.findViewById(R.id.btn4);
Load.setOnClickListener(onClickLoad(myFragmentView));
firstName=(EditText)myFragmentView.findViewById(R.id.FN);
name=(EditText)myFragmentView.findViewById(R.id.name);
patientID=(EditText)myFragmentView.findViewById(R.id.PID);
minH=(EditText)myFragmentView.findViewById(R.id.Hmin);
maxH=(EditText)myFragmentView.findViewById(R.id.Hmax);
minI=(EditText)myFragmentView.findViewById(R.id.Imin);
maxI=(EditText)myFragmentView.findViewById(R.id.Imax);
minB=(EditText)myFragmentView.findViewById(R.id.Bmin);
maxB=(EditText)myFragmentView.findViewById(R.id.Bmax);
return myFragmentView;
}
private OnClickListener onClickLoad(View myFragmentView) {
// TODO Auto-generated method stub
return new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
firstName.setText(nameofP);
name.setText(FName);
patientID.setText(pID);
minH.setText(String.valueOf(HRM));
maxH.setText(String.valueOf(HRX));
minI.setText(String.valueOf(IBIM));
maxI.setText(String.valueOf(IBIX));
minB.setText(String.valueOf(BRM));
maxB.setText(String.valueOf(BRX));
updateDetails(patient);
}
private void updateDetails(Patient patient) {
// TODO Auto-generated method stub
DatabaseHandler androidDbHelper = new DatabaseHandler(getActivity());
SQLiteDatabase sql=androidDbHelper.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(androidDbHelper.KEY_NAME, nameET);
contentValues.put(androidDbHelper.KEY_HR, firstNameET);
contentValues.put(androidDbHelper.KEY_IBI, pIDET);
contentValues.put(androidDbHelper.KEY_HMIN, minHET);
contentValues.put(androidDbHelper.KEY_HMAX, maxHET);
contentValues.put(androidDbHelper.KEY_IMIN, minIET);
contentValues.put(androidDbHelper.KEY_IMAX, maxIET);
contentValues.put(androidDbHelper.KEY_BMIN, minBET);
contentValues.put(androidDbHelper.KEY_BMAX, maxBET);
String[] clauseArgument= new String[1];
clauseArgument[0]=patient.getName();
System.out.println("whereClauseArgument[0] is :" + clauseArgument[0]);
sql.update(androidDbHelper.NAME_TABLE, contentValues, androidDbHelper.KEY_NAME+"=?", clauseArgument);
sql.close();
}
};
}
private OnClickListener onClickSave(final View myFragmentView) {
return new OnClickListener() {
/**
*
* @see android.view.View.OnClickListener#onClick(android.view.View)
*/
@Override
public void onClick(View v) {
//set the values that we extracted
nameET=firstName.getText().toString();
firstNameET=name.getText().toString();
pIDET=patientID.getText().toString();
minHET=minH.getText().toString();
maxHET= maxH.getText().toString();
minIET= minI.getText().toString();
maxIET=maxI.getText().toString();
minBET=minB.getText().toString();
maxBET=maxB.getText().toString();
patient.setName(nameofP);
patient.setFirstName(FName);
patient.setId(pID);
patient.setNumHeartRateMin(HRM);
patient.setNumHeartRateMax(HRX);
patient.setNumInterBeatIntervalMin(IBIM);
patient.setNumInterBeatIntervalMax(IBIX);
patient.setNumBreathingrateMin(BRM);
patient.setNumBreathingrateMax(BRX);
insertData(patient);
}
public void insertData(Patient patient) {
DatabaseHandler androidDbHelper = new DatabaseHandler(getActivity());
SQLiteDatabase sql=androidDbHelper.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(androidDbHelper.KEY_NAME, patient.getName());
contentValues.put(androidDbHelper.KEY_HR, patient.getFirstName());
contentValues.put(androidDbHelper.KEY_IBI, patient.getId());
contentValues.put(androidDbHelper.KEY_HMIN, patient.getNumHeartRateMin());
contentValues.put(androidDbHelper.KEY_HMAX, patient.getNumHeartRateMax());
contentValues.put(androidDbHelper.KEY_IMIN, patient.getNumInterBeatIntervalMin());
contentValues.put(androidDbHelper.KEY_IMAX, patient.getNumInterBeatIntervalMax());
contentValues.put(androidDbHelper.KEY_BMIN, patient.getNumBreathingrateMin());
contentValues.put(androidDbHelper.KEY_BMAX, patient.getNumBreathingrateMax());
long columnID=sql.insert(androidDbHelper.NAME_TABLE, null, contentValues);
sql.close();
Toast.makeText(getActivity().getBaseContext(), "Values inserted column ID is :" + columnID, Toast.LENGTH_SHORT).show();
}
};
}
}
Here is my DatadaseHandler.java
public class DatabaseHandler extends SQLiteOpenHelper {
// Database fields
public SQLiteDatabase db;
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
private static final int DATABASE_VERSION = 3;
// Database Name
private static final String DATABASE_NAME = "dataManager";
public static final String NAME_TABLE = "nametable";
// Contacts table name
public static final String KEY_NAME = "name";
public static final String KEY_HR = "firstName";
public static final String KEY_IBI = "patientID";
public static final String KEY_HMIN = "MinimumofHeartRate";
public static final String KEY_HMAX = "MaximumofHeartRate";
public static final String KEY_IMIN = "MinimumofIBI";
public static final String KEY_IMAX = "MaximumofIBI";
public static final String KEY_BMIN = "MinimumofBreathingRate";
public static final String KEY_BMAX = "MaximumofBreathingRate";
private static final String TEXT_TYPE = " TEXT";
private static final String COMMA_SEP = ", ";
// Creating Tables
static final String DATABASE_CREATE_FIRST = "CREATE TABLE IF NOT EXISTS "
+ NAME_TABLE + "(" + KEY_NAME + TEXT_TYPE + COMMA_SEP + KEY_HR
+ TEXT_TYPE + COMMA_SEP + KEY_IBI + TEXT_TYPE + COMMA_SEP
+ KEY_HMIN + TEXT_TYPE + COMMA_SEP + KEY_HMAX + TEXT_TYPE
+ COMMA_SEP + KEY_IMIN + TEXT_TYPE + COMMA_SEP + KEY_IMAX
+ TEXT_TYPE + COMMA_SEP + KEY_BMIN + TEXT_TYPE + COMMA_SEP
+ KEY_BMAX + TEXT_TYPE + ")";
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(DATABASE_CREATE_FIRST);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_CREATE_FIRST);
onCreate(db);
}
And here is my getter and setter variables::patient.java
public class Patient {
private String id;
private String firstName;
private String name;
private String numHeartRateMin, numHeartRateMax, numInterBeatIntervalMin, numInterBeatIntervalMax,
numBreathingrateMin, numBreathingrateMax;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNumHeartRateMin() {
return numHeartRateMin;
}
public void setNumHeartRateMin(String numHeartRateMin) {
this.numHeartRateMin = numHeartRateMin;
}
public String getNumHeartRateMax() {
return numHeartRateMax;
}
public void setNumHeartRateMax(String numHeartRateMax) {
this.numHeartRateMax = numHeartRateMax;
}
public String getNumInterBeatIntervalMin() {
return numInterBeatIntervalMin;
}
public void setNumInterBeatIntervalMin(String numInterBeatIntervalMin) {
this.numInterBeatIntervalMin = numInterBeatIntervalMin;
}
public String getNumInterBeatIntervalMax() {
return numInterBeatIntervalMax;
}
public void setNumInterBeatIntervalMax(String numInterBeatIntervalMax) {
this.numInterBeatIntervalMax = numInterBeatIntervalMax;
}
public String getNumBreathingrateMin() {
return numBreathingrateMin;
}
public void setNumBreathingrateMin(String numBreathingrateMin) {
this.numBreathingrateMin = numBreathingrateMin;
}
public String getNumBreathingrateMax() {
return numBreathingrateMax;
}
public void setNumBreathingrateMax(String numBreathingrateMax) {
this.numBreathingrateMax = numBreathingrateMax;
}
}
I know, I put long code but believe me these are necessary to describe my problem...
回答1:
You are inserting Null Strings in Pacient and saving on the DB.
First:
Create a Global Pacient:
Patient currentPatient= new Patient();
After, in onClickLoad:
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
firstName.setText(currentPatient.getName());
name.setText(currentPatient.getFirstName());
patientID.setText(currentPatient.getId());
minH.setText(currentPatient.getNumHeartRateMin());
maxH.setText(currentPatient.getNumHeartRateMax());
minI.setText(currentPatient.getNumInterBeatIntervalMin());
maxI.setText(currentPatient.getNumInterBeatIntervalMax());
minB.setText(currentPatient.getNumBreathingrateMin());
maxB.setText(currentPatient.getNumBreathingrateMax());
updateDetails(patient);
}
This fix the save action.
nameET=firstName.getText().toString();
firstNameET=name.getText().toString();
pIDET=patientID.getText().toString();
minHET=minH.getText().toString();
maxHET= maxH.getText().toString();
minIET= minI.getText().toString();
maxIET=maxI.getText().toString();
minBET=minB.getText().toString();
maxBET=maxB.getText().toString();
patient.setName(nameET);
patient.setFirstName(firstNameET);
patient.setId(pIDET);
patient.setNumHeartRateMin(minHET);
patient.setNumHeartRateMax(maxHET);
patient.setNumInterBeatIntervalMin(minIET);
patient.setNumInterBeatIntervalMax(maxIET);
patient.setNumBreathingrateMin(minBET);
patient.setNumBreathingrateMax(maxBET);
insertData(patient);
来源：https://stackoverflow.com/questions/19099789/androiddata-are-not-retrieving-to-edittext-field-through-database