我正在尝试在我的数据库中插入行，但没有任何内容被持久化。这是我的助手班：
package com.android.cancertrials;
import java.util.Calendar;
import java.util.GregorianCalendar;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DataBaseHelper extends SQLiteOpenHelper{
public DataBaseHelper(Context context, String name) {
super(context, name, null, 1);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
System.out.println("the database in onCreate: "+db);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
@Override
public void onOpen(SQLiteDatabase db) {
System.out.println("the database: "+db);
this.db=db;
super.onOpen(db);
}
public void insertRecordBean(RecordBean recordbean){
ContentValues content=new ContentValues();
content.put("TrialPhase", AdvanceSearchTab2.phaseOptions.toString());
content.put("TrialStatus", AdvanceSearchTab2.typeOptions.toString());
content.put("StudyType", AdvanceSearchTab2.statusOptions.toString());
content.put("ContactType", AdvanceSearchTab2.contactSpinner.toString());
content.put("MileRange", AdvanceSearchTab2.rangeSpinner.toString());
content.put("Location", AdvanceSearchTab2.locationSpinner.toString());
db.insert("tblClinicalTrial", null, content);
}
/*public void insertRecordResult(RecordBean recordbean){
ContentValues content1=new ContentValues();
content1.put("NCTID", recordbean.getNctId());
content1.put("Title", recordbean.getTitle());
content1.put("TrialPhase", recordbean.getTrialPhase());
content1.put("TrialStaus", recordbean.getTrialStatus());
content1.put("Summary", recordbean.getSummary());
content1.put("Conditions", recordbean.getConditions());
content1.put("Interventions", recordbean.getIntervention());
content1.put("Description", recordbean.getDescription());
content1.put("SponserName", recordbean.getSponsor());
content1.put("Inclusion", recordbean.getInclusionCriteria());
content1.put("Exclusion", recordbean.getExclusionCriteria());
content1.put("StudyPop", recordbean.getStudyPop());
content1.put("MinAge", recordbean.getMinimumAge());
content1.put("MaxAge", recordbean.getMaximumAge());
content1.put("Gender", recordbean.getGender());
content1.put("Hvolunteer", recordbean.getHealthyVolunteers());
content1.put("EnrollmentType", recordbean.getEnrollment());
content1.put("EnrollmentNum", recordbean.getEnrollment());
content1.put("VerifiedOn", recordbean.getVerifiedOn());
db.insert("tblResultItem", null, content1);
}*/
public void insertRecordBookmark(RecordBean recordbean){
ContentValues content2=new ContentValues();
content2.put("NCTID", recordbean.getNctId());
content2.put("Title", recordbean.getTitle());
content2.put("TrialPhase", recordbean.getTrialPhase());
content2.put("TrialStatus", recordbean.getTrialStatus());
content2.put("Summary", recordbean.getSummary());
content2.put("Conditions", recordbean.getConditions());
content2.put("Interventions", recordbean.getIntervention());
content2.put("Description", recordbean.getDescription());
content2.put("SponserName", recordbean.getSponsor());
content2.put("Inclusion", recordbean.getInclusionCriteria());
content2.put("Exclusion", recordbean.getExclusionCriteria());
content2.put("StudyPop", recordbean.getStudyPop());
content2.put("MinAge", recordbean.getMinimumAge());
content2.put("MaxAge", recordbean.getMaximumAge());
content2.put("Gender", recordbean.getGender());
content2.put("Hvolunteer", recordbean.getHealthyVolunteers());
content2.put("EnrollmentType", recordbean.getEnrollment());
content2.put("EnrollmentNum", recordbean.getEnrollment());
content2.put("VerifiedOn", recordbean.getVerifiedOn());
content2.put("UpdatedOn", recordbean.getUpdatedOn());
content2.put("LocationName", recordbean.getLocationName());
content2.put("LocationStatus", recordbean.getLocationStatus());
content2.put("City", recordbean.getCity());
content2.put("State", recordbean.getState());
content2.put("Country", recordbean.getCountry());
content2.put("Distance", recordbean.getLocationDist());
content2.put("Long", recordbean.getLongitude());
content2.put("lat", recordbean.getLatitude());
content2.put("Url", recordbean.getSourceUrl());
content2.put("Location_id", recordbean.getLocationId());
content2.put("Zip_code", recordbean.getZip());
db.insert("tblBookMarkItem", null, content2);
}
public Cursor getBookMarks(){
String[] columns={"_id","Title","Gender","TrialPhase","Zip_code","Location_id","NCTID"};
return db.query("tblBookMarkItem", columns, null, null, null, null, null);
}
public Cursor getRecent(){
String[] columns={"SearchString","ProfileDate","_id","years","Gender","TrialPhase","StudyType","TrialStatus","ContactType","MileRange","LocationZip","UrlParameter"};
return db.query("tblProfile", columns, null, null, null, null, null);
}
public void insertRecordProfile(String search,String url){
ContentValues content4=new ContentValues();
GregorianCalendar c=new GregorianCalendar();
content4.put("ProfileDate",c.get(GregorianCalendar.DATE)+"/"+(c.get(GregorianCalendar.MONTH)+1)+"/"+ c.get(GregorianCalendar.YEAR));
// content4.put("years", age);
//content3.put("ProfileType", AdvanceSearchTab2.typeOptions.toString());
//content4.put("months", AdvanceSearchTab1.ageEdit.getText().toString());
content4.put("SearchString", search);
// content4.put("Gender", gender);
// content4.put("TrialPhase", phase);
// content4.put("StudyType", study);
// content4.put("TrialStatus", status);
// content4.put("ContactType", contact);
// content4.put("MileRange", mile);
// content4.put("LocationZip", zip);
// //content4.put("searchString", AdvanceSearchTab1.edit_se.toString());
content4.put("UrlParameter", url);
db.insert("tblProfile", null, content4);
}
public void insertRecordMedical(RecordBean recordbean){
ContentValues content3=new ContentValues();
content3.put("years", AdvanceSearchTab1.ageEdit.toString());
content3.put("months", AdvanceSearchTab1.ageEdit.toString());
content3.put("searchString", AdvanceSearchTab1.edit_se.toString());
content3.put("Gender", AdvanceSearchTab1.hubSpinner.toString());
db.insert("tblMedicalProfile", null, content3);
}
public void deleteRecord(int id){
//_id=1;
db.delete("tblBookMarkItem", "_id="+id, null);
}
public void deleteRecent(int id){
//_id=1;
db.delete("tblProfile", "_id="+id, null);
}
private SQLiteDatabase db;
}
当我在ListAdapter中显示它时，它看起来很好。一旦我杀了我的申请。我的更改不会持续存在。这是为什么？
答案 0 :(得分：1)
您在哪里制作数据库？此外，您应该使用定义的常量引用数据库的各个方面。
我在帖子中没有看到您创建数据库的位置。例如，在我拥有的应用程序中（链接到完整文件：http://code.devminded.com/score-it/src/56ac2292cfa3/src/com/devminded/scoreit/ScoreDbAdapter.java），您可以看到我的数据库类：
public class ScoreDbAdapter {
public static final String TAG = "com.devminded.scoreit.ScoreDbAdapter";
/**
* Keys for the player table. ID is incrementing value to
* reference the players.
*/
public static final String KEY_PLAYERS_ID = "_id";
public static final String KEY_PLAYERS_NAME = "name";
public static final String KEY_PLAYERS_ICON = "icon";
public static final String KEY_PLAYERS_SCORE = "score";
public static final String KEY_PLAYERS_ORDER = "turn";
/**
* Keys for the History table. Sequence is an increase value. Their order
* is the order the transactions were made.
*/
public static final String KEY_HISTORY_ID = "_id";
public static final String KEY_HISTORY_PLAYER = "player";
public static final String KEY_HISTORY_VALUE = "value";
public static final String KEY_HISTORY_NOTE = "note";
public static final String DATABASE_NAME = "scoreitdb";
public static final String TABLE_PLAYERS = "players";
public static final String TABLE_HISTORY = "history";
public static final String TRIGGER_UPDATE_NEW_SCORE = "update_new_score";
public static final String TRIGGER_UPDATE_SCORE = "update_score";
public static final String TRIGGER_DELETE_SCORE = "delete_score";
public static final String TRIGGER_DELETE_HISTORY = "delete_history";
public static final int DATABASE_VERSION = 25;
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private final Context mCtx;
private int mNumPlayers;
private static final String CREATE_TABLE_PLAYERS =
"create table " + TABLE_PLAYERS + " (" + KEY_PLAYERS_ID + " integer primary key autoincrement, "
+ KEY_PLAYERS_NAME + " text not null, " + KEY_PLAYERS_ICON + " long not null, " + KEY_PLAYERS_SCORE + " long not null, "
+ KEY_PLAYERS_ORDER + " long not null);";
private static final String CREATE_TABLE_HISTORY =
"create table " + TABLE_HISTORY + " (" + KEY_HISTORY_ID + " integer primary key autoincrement, "
+ KEY_HISTORY_PLAYER + " integer not null, " + KEY_HISTORY_NOTE + " text not null, "
+ KEY_HISTORY_VALUE + " integer not null);";
private static final String CREATE_TRIGGER_NEW_SCORE =
"create trigger " + TRIGGER_UPDATE_NEW_SCORE + " after insert on " + TABLE_HISTORY
+ " begin"
+ " update " + TABLE_PLAYERS + " set " + KEY_PLAYERS_SCORE + " = " + KEY_PLAYERS_SCORE + " + new." + KEY_HISTORY_VALUE + " where " + KEY_PLAYERS_ID + " = new. " + KEY_HISTORY_PLAYER + ";"
+ " end;";
private static final String CREATE_TRIGGER_UPDATE_SCORE =
"create trigger " + TRIGGER_UPDATE_SCORE + " after update on " + TABLE_HISTORY
+ " begin"
+ " update " + TABLE_PLAYERS + " set " + KEY_PLAYERS_SCORE + " = " + KEY_PLAYERS_SCORE + " + (new." + KEY_HISTORY_VALUE + " - old." + KEY_HISTORY_VALUE + ")"
+ " where " + KEY_PLAYERS_ID + " = new. " + KEY_HISTORY_PLAYER + ";"
+ " end;";
private static final String CREATE_TRIGGER_DELETE_SCORE =
"create trigger " + TRIGGER_DELETE_SCORE + " after delete on " + TABLE_HISTORY
+ " begin"
+ " update " + TABLE_PLAYERS + " set " + KEY_PLAYERS_SCORE + " = " + KEY_PLAYERS_SCORE + " - old." + KEY_HISTORY_VALUE
+ " where " + KEY_PLAYERS_ID + " = old." + KEY_HISTORY_PLAYER + ";"
+ " end;";
private static final String CREATE_TRIGGER_DELETE_HISTORY =
"create trigger " + TRIGGER_DELETE_HISTORY + " delete on " + TABLE_PLAYERS
+ " begin"
+ " delete from " + TABLE_HISTORY + " where " + KEY_HISTORY_PLAYER + " = old." + KEY_PLAYERS_ID + ";"
+ " end;";
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_TABLE_PLAYERS);
db.execSQL(CREATE_TABLE_HISTORY);
db.execSQL(CREATE_TRIGGER_NEW_SCORE);
db.execSQL(CREATE_TRIGGER_DELETE_HISTORY);
db.execSQL(CREATE_TRIGGER_UPDATE_SCORE);
db.execSQL(CREATE_TRIGGER_DELETE_SCORE);
}
@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 TRIGGER IF EXISTS " + TRIGGER_DELETE_HISTORY);
db.execSQL("DROP TRIGGER IF EXISTS " + TRIGGER_UPDATE_NEW_SCORE);
db.execSQL("DROP TRIGGER IF EXISTS " + TRIGGER_UPDATE_SCORE);
db.execSQL("DROP TRIGGER IF EXISTS " + TRIGGER_DELETE_SCORE);
db.execSQL("DROP TABLE IF EXISTS "+ TABLE_PLAYERS);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_HISTORY);
onCreate(db);
}
}
public ScoreDbAdapter(Context ctx) {
this.mCtx = ctx;
}
public ScoreDbAdapter open() throws SQLException {
if (mDbHelper == null) {
mDbHelper = new DatabaseHelper(mCtx);
}
mDb = mDbHelper.getWritableDatabase();
countPlayers();
return this;
}
public void close() {
mDbHelper.close();
}
public long createPlayer(String name, int icon, long score) {
countPlayers();
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_PLAYERS_NAME, name);
initialValues.put(KEY_PLAYERS_ICON, icon);
initialValues.put(KEY_PLAYERS_SCORE, score);
initialValues.put(KEY_PLAYERS_ORDER, mNumPlayers);
return mDb.insert(TABLE_PLAYERS, null, initialValues);
}
在创建播放器中，您可以看到我使用相同的功能来添加您。但是我不知道你在哪里创建数据库。你能告诉我们类似的功能吗？有些东西显然不对，我们似乎仍然缺少所需信息的某些方面。
编辑：对不起，显然我的来源在某种程度上混合了标签和空格，我想我搞砸了日食设置。