我正在尝试创建一个简单的联系人列表应用程序，当我按下按钮创建联系人时，它显示一个表单，其中我必须在此表单中添加详细信息后添加联系人deatils然后我必须按保存按钮将这些字段保存到我的数据库中，但是当我按下保存按钮时遇到错误
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent { (has extras) }}
to activity {com.webpreneur_contactlist/com.webpreneur_contactlist.WebpreneurActivity}:
java.lang.IllegalStateException: database not open
这是我的代码：
public class WebpreneurActivity extends ListActivity {
private static final int CONTACT_CREATE = 0;
private static final int CONTACT_EDIT = 1;
//select the second one, Android view menu
private static final int INSERT_ID = Menu.FIRST;
private static final int DELETE_ID = Menu.FIRST + 1;
private DBHandler dbHelper;
private Cursor c;
ImageButton imageButton;
long rowid;
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.d("database1" ,"0");
Log.d("Your Location4", "ok4:");
super.onCreate(savedInstanceState);
Log.d("database1" ,"1");
setContentView(R.layout.activity_webpreneur);
Log.d("database1" ,"2");
dbHelper = new DBHandler(this);
Log.d("database1" ,"3");
dbHelper.open();
//addListenerOnButton();
//dbHelper.addContact();
dbHelper.close();
imageButton = (ImageButton) findViewById(R.id.imageButton1);
Log.d("database1" ,"button");
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Log.d("database1" ,"b4");
Intent i = new Intent(getApplicationContext(), ContactEdit.class);
startActivityForResult(i, CONTACT_CREATE);
Log.d("database1" ,"button3");
//fillData();
}
});
}
@SuppressWarnings("deprecation")
public void fillData() {
Log.d("Your Location4", "ok6:");
c = dbHelper.fetchAllRows();
Log.d("Your Location4", "ok8:");
startManagingCursor(c);
Log.d("Your Location4", "ok2:");
ListAdapter adapter = new SimpleCursorAdapter(this,
R.layout.contact_row, c, new String[] { DBHandler.Key_Name,
DBHandler.Key_Phone }, new int[] { R.id.name,
R.id.phonenumber });
setListAdapter(adapter);
}
/*private void createContact() {
Intent i = new Intent(this, ContactEdit.class);
startActivityForResult(i, CONTACT_CREATE);
}*/
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Intent i = new Intent(this, ContactEdit.class);
i.putExtra(DBHandler.Key_ID, c.getLong(c.getColumnIndex(DBHandler.Key_ID)));
i.putExtra(DBHandler.Key_Name, c.getString(c.getColumnIndex(DBHandler.Key_Name)));
i.putExtra(DBHandler.Key_Address, c.getString(c.getColumnIndex(DBHandler.Key_Address)));
i.putExtra(DBHandler.Key_Phone, c.getString(c.getColumnIndex(DBHandler.Key_Phone)));
i.putExtra(DBHandler.Key_Website, c.getString(c.getColumnIndex(DBHandler.Key_Home)));
startActivityForResult(i, CONTACT_EDIT);
}
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
String name = data.getStringExtra(DBHandler.Key_Name);
String address = data.getStringExtra(DBHandler.Key_Address);
String mobile = data.getStringExtra(DBHandler.Key_Phone);
String home = data.getStringExtra(DBHandler.Key_Home);
switch (requestCode) {
case CONTACT_CREATE:
Log.d("Your Location4", "jj:");
dbHelper.createRow(name, address, mobile, home);
Log.d("Your Location4", "ok90:");
fillData();
break;
case CONTACT_EDIT:
String id = data.getStringExtra(DBHandler.Key_ID);
long rowId=Long.parseLong(id);
if (rowId != (Long)null){
dbHelper.updateRow(rowId, name, address, mobile, home);
}
fillData();
break;
}
}
}
}
/////////////////////////////////////////////////
public class ContactEdit extends Activity {
protected EditText nameText;
private EditText addressText;
private EditText mobileText;
private EditText homeText;
public long rowId;
Button submitButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("database1" ,"button4");
setContentView(R.layout.contact_edit);
Log.d("database1" ,"button5");
nameText = (EditText) findViewById(R.id.textName);
addressText = (EditText) findViewById(R.id.textAddress);
mobileText = (EditText) findViewById(R.id.textMobile);
homeText = (EditText) findViewById(R.id.textHome);
Button submitButton = (Button) findViewById(R.id.BtnSave);
//long rowId = (Long) null;
Intent extras = getIntent();
Log.d("database1" ,"button5");
if (extras != null){
//get all the values for the corresponding keys
String name = extras.getStringExtra(DBHandler.Key_Name);
String address = extras.getStringExtra(DBHandler.Key_Address);
String mobile = extras.getStringExtra(DBHandler.Key_Phone);
String home = extras.getStringExtra(DBHandler.Key_Home);
// String id = extras.getStringExtra(DBHandler.Key_ID);
//Log.d("database1" ,"button6");
// rowId=Long.parseLong(id.trim());
// if (rowId != (Long)null)
// {
// Log.d("foract","gact");
//}
//else {
// Log.d("foract","gactttt");
//}
if (name !=null){
nameText.setText(name);
}
if (address != null){
addressText.setText(address);
}
if (mobile != null){
mobileText.setText(mobile);
}
if (home != null){
homeText.setText(home);
}
}
submitButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v){
//Intent bundle = new Bundle();
Intent intent=new Intent();
intent.putExtra(DBHandler.Key_Name, nameText.getText().toString());
intent.putExtra(DBHandler.Key_Address, addressText.getText().toString());
intent.putExtra(DBHandler.Key_Phone, mobileText.getText().toString());
intent.putExtra(DBHandler.Key_Home, homeText.getText().toString());
// intent.putExtra(DBHandler.Key_ID, rowId);
// Log.d(DBHandler.Key_ID, rowId);
setResult(RESULT_OK,intent);
Log.e("what","result set");
finish();
}
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
}
});
}}
//////////////////////////////////
DBHANDLER CLASS///////////////////
public class DBHandler extends SQLiteOpenHelper{
private static final int DB_Version = 1;
private static final String DB_Name = "Places";
protected static final String Places_Table = "Places";
String name, Address, Website,ID;
//WebpreneurActivity Contact;
public static final String Key_ID = "ID";
public static final String Key_Name = "Name";
public static final String Key_Phone = "Phone";
public static final String Key_Address = "Address";
public static final String Key_Website = "Website";
public static final String Key_Home = "HOME";
public static final String PROJECTION[] = {
Key_ID,
Key_Name,
Key_Address,
Key_Phone,
Key_Home
};
String CREATE_PLACES_TABLE = "create table if not exists Places_Table (id integer primary key ,"+
"name VARCHAR not null, phone VARCHAR not null, address VARCAHR not null, website VARCHAR not null,Home VARCHAR not null)";
Context context;
SQLiteDatabase db;
public DBHandler(Context context) {
super(context, DB_Name, null, DB_Version);
Log.d("database1" ,"4");
}
@Override
public void onCreate(SQLiteDatabase db) {
try{
Log.d("DB", "DB creationnewwwww");
db.execSQL("CREATE TABLE " + Places_Table + " (" +
Key_ID + " INT PRIMARY KEY NOT NULL,"+
Key_Name + " TEXT NOT NULL," +
Key_Phone + " TEXT NOT NULL," +
Key_Address + " TEXT NOT NULL," +
Key_Website + " TEXT," +
Key_Home + " TEXT)");
Log.d("DB", "DB creationnewwwwwwwwwwwwwwwwwwwwwwwwwww");
}
catch(SQLiteException e){
Log.d("DB", "DB creation excptionhhhhhhhhhhhhhhh");
e.printStackTrace();
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("Drop Table If Exists" + Places_Table);
onCreate(db);
}
/* void addContact() {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(Key_Name,Name); // Contact Name
values.put(KEY_COST,cost); // Contact Phone
values.put(Key_Address, contact.Address); //Contact phone no
// Inserting Row
db.insert(Places_Table, null, values);
db.close(); // Closing database connection
}*/
public DBHandler open()
{Log.d("DB", "DB creation 9");
db = this.getWritableDatabase();
//onCreate(db);
Log.d("DB", "DB creation 9");
return this;
}
public void close()
{
db.close();
}
//Adding Places
void addPlaces( int id, String name,String phone, String address,String url){
Log.d("DB", "DB creation 1");
//SinglePlaceActivity single = new SinglePlaceActivity(); Log.d("DB", "DB creation 2");
ContentValues contentValues = new ContentValues();
Log.d("DB", "DB creation 3");
contentValues.put(Key_ID, id);
Log.d("DB", "DB creation 4");
contentValues.put(Key_Name, name);
contentValues.put(Key_Phone, phone);
contentValues.put(Key_Address, address);
contentValues.put(Key_Website, url);
Log.d("DB", "DB creation 4");
db.insert(Places_Table, null, contentValues);
Log.d("DB", "DB creation 5555");
//db.close();
}
public String getdata() {
// TODO Auto-generated method stub
String [] columns =new String[]{Key_ID ,Key_Name,Key_Address,Key_Website};
Cursor c =db.query(DB_Name, columns, null, null, null, null, null);
String Result="";
int iRow=c.getColumnIndex(Key_ID);
int iName=c.getColumnIndex(Key_Name);
int iAddress=c.getColumnIndex(Key_Address);
int iWebsite=c.getColumnIndex(Key_Website);
for(c.moveToFirst();!c.isAfterLast();c.moveToNext()){
Result=Result+c.getString(iRow)+" "+c.getString(iName)+ " "+c.getString(iAddress)+ " "+c.getString(iWebsite)+ "\n";
}
return Result;
}
public void createRow(String name, String address, String Phone, String home)
{
ContentValues initialValues = new ContentValues();
initialValues.put(Key_Name, name);
initialValues.put(Key_Address, address);
initialValues.put(Key_Phone, Phone);
initialValues.put(Key_Home, home);
//pass the initialValues to the database to insert the row
Log.d(Key_Home, home);
db.insert(Places_Table, null, initialValues);
Log.d("Your Location4", "okna:");
}
public void deleteRow(long rowId){
db.delete(Places_Table, Key_ID+"="+rowId,null);
}
public boolean updateRow (long rowId, String name, String address, String Phone, String home){
ContentValues args = new ContentValues();
args.put(Key_Name, name);
args.put(Key_Address, address);
args.put(Key_Phone, Phone);
args.put(Key_Home, home);
return db.update(Places_Table, args, Key_ID +"="+ rowId, null)>0;
}
public Cursor fetchRow(long rowId) throws SQLException{
Cursor result = db.query( Places_Table, null,
Key_ID + "=" + rowId, null, null, null,null);
if ((result.equals(rowId)) || !result.isFirst()) {
throw new SQLException("No note matching ID: " + rowId);
}
return result;
}
public Cursor fetchAllRows(){
Log.d("Your Location4", "ok99:");
return db.query(Places_Table, PROJECTION,
null, null, null, null, null);
}
}
答案 0 :(得分：0)
请执行以下操作。可能会对你有用：
第一：
声明你的
private static String DB_NAME="Database_Name";
private final Context context;
private String DB_PATH="";
private static int DB_VERSION=1;
SQLiteDatabase db;
作为
private static SQLiteDatabase db;
你的构造函数就像：
public DBHandler(Context context){
super(context, DB_NAME, null,DB_VERSION);
this.context = context;
DB_PATH = "/data/data/" + context.getPackageName() + "/" + "databases/";
}
然后在访问它之前打开您的数据库。：
public void open() throws SQLException{
//Open the database
String myPath = DB_PATH + DB_NAME;
db = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
}
在访问数据后，将其关闭为：
@Override
public synchronized void close() {
if(db != null)
db.close();
super.close();
}
可能会对你有帮助。