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所以我遇到了一个奇怪的问题。我正在尝试将数据文件写入设备。我在2.2版的eclipse中开发了应用程序，我的设备是2.3.3，所以我让仿真器运行在2.3.3上，它将文件写入正确。为什么这不适用于设备？它也被编码以将设备上的数据库文件复制到php服务器。在服务器上的文件基本上是空的，我也从设备中拉出数据库文件，它是空的。它唯一的工作时间是在模拟器上，我在服务器上得到一个合法的文件，当我拉数据库时，它有数据。我很迷茫。如果你想看到一些代码，然后问，我会张贴一些，但有40多个班，我真的不知道从哪里开始。 在此先感谢。可以写入文件到服务器在模拟器但不是设备？
下面是有关数据库创建
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DbHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "database";
private static final int DATABASE_VERSION = 1;
// Database creation sql statement
private static final String DATABASE_CREATE = "create table database (_id integer primary key autoincrement," +
"name text not null);";
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Method is called during creation of the database
@Override
public void onCreate(SQLiteDatabase database) {
database.execSQL(DATABASE_CREATE);
}
// Method is called during an upgrade of the database, e.g. if you increase
// the database version
@Override
public void onUpgrade(SQLiteDatabase database, int oldVersion,
int newVersion) {
Log.w(DbHelper.class.getName(),
"Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
database.execSQL("DROP TABLE IF EXISTS database");
onCreate(database);
}
}
这里是适配器代码..
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
public class DbAdapter {
// Database fields
public static final String KEY_ROWID = "_id";
public static final String KEY_NAME = "name";
static final String DATABASE_TABLE = "database";
private Context context;
private SQLiteDatabase database;
private DbHelper dbHelper;
public DbAdapter(Context ctx) {
context = ctx;
}
public SQLiteDatabase openToRead() throws SQLException {
dbHelper = new DbHelper(context);
database = dbHelper.getReadableDatabase();
return database;
}
public SQLiteDatabase open() throws SQLException {
dbHelper = new DbHelper(context);
database = dbHelper.getWritableDatabase();
return database;
}
public void close() {
dbHelper.close();
}
//
/**
* Create a new todo If the todo is successfully created return the new
* rowId for that note, otherwise return a -1 to indicate failure.
*/
public long createRow(String name) {
ContentValues initialValues = createContentValues(name);
return database.insert(DATABASE_TABLE, null, initialValues);
}
/**
* Update the todo
*/
public boolean updateRows(long rowId,
String name) {
ContentValues updateValues = createContentValues(
name);
return database.update(DATABASE_TABLE, updateValues, KEY_ROWID + "="
+ rowId, null) > 0;
}
/**
* Deletes todo
*/
public boolean deleteRow(long rowId) {
return database.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
}
/**
* Return a Cursor over the list of all todo in the database
*
* @return Cursor over all notes
*/
public Cursor fetchAllRows() {
return database.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_NAME}, null, null, null,
null, null);
}
/**
* Return a Cursor positioned at the defined todo
*/
public Cursor fetchRow(long rowId) throws SQLException {
Cursor mCursor = database.query(true, DATABASE_TABLE, new String[] {
KEY_ROWID ,KEY_NAME},
KEY_ROWID + "=" + rowId, null, null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
/**fetches keyword**/
public Cursor fetchKeyword(String keyword, String column, String[] columns) throws SQLException {
Cursor mCursor = database.query(DATABASE_TABLE, columns, column + "='" + keyword + "'",
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
private ContentValues createContentValues(String name){
ContentValues values = new ContentValues();
values.put(KEY_NAME, name);
return values;
}
//returns (an) entire column(s), all rows
public Cursor fetchColumns(String[] colnames) {
Cursor mCursor = database.query(DATABASE_TABLE, colnames, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
}
好吧，我孤立它这三个类..下面是创建条目并将其上传到服务器的类。据我可以告诉数据库不被创建正确的方式..在有文件
public class CreateName extends Activity{
//variables
private DbAdapter mDbHelper;
EditText textField;
TextView txtEnter2;
TextView txtEnter;
Button btnSubmit;
Context context;
SharedPreferences prefs;
SharedPreferences.Editor spe;
SQLiteDatabase db;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.submit);
//constructors
context = getApplicationContext();
prefs = PreferenceManager.getDefaultSharedPreferences(context);
spe = prefs.edit();
init();
listen();
}
public void checker() {
Intent i = new Intent(this, MoveForward.class);
startActivity(i);
}
private void listen() {
btnSubmit.setOnClickListener(new Button.OnClickListener()
{
public void onClick (View v)
{
mDbHelper = new DbAdapter(context);
String words = textField.getText().toString();
Log.v(words, words);
mDbHelper.open();
mDbHelper.createRow(words);
mDbHelper.close();
spe.putString("name", words);
spe.commit();
PHPBuddy buddy = new PHPBuddy();
try {
buddy.uploadFile("database");
} catch (Exception e) {
// ask the user to retry
e.printStackTrace();
}
checker();
}
}
);
}
private void init() {
textField = (EditText)findViewById(R.id.edtTxt);
txtEnter2 = (TextView)findViewById(R.id.txtEnter2);
txtEnter = (TextView)findViewById(R.id.txtEnter);
btnSubmit =(Button)findViewById(R.id.btnSubmit);
txtEnter.setText("Enter your proper name");
txtEnter2.setText("ex: John Smith");
}
}
也许有一个光标或DB我差点忘中没有表关闭？
这里是更多的代码..
public class SBMain extends Activity {
Button btnSpinner;
String[] items;
String text;
Spinner s;
Intent i, j;
int activity;
SharedPreferences prefs;
SharedPreferences.Editor spe;
SQLiteDatabase db;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.spinnerscreen);
prefs = PreferenceManager.getDefaultSharedPreferences(this);
spe = prefs.edit();
init();
fillSpinner();
btnSpinner.setOnClickListener(new Button.OnClickListener()
{
public void onClick (View v)
{
Cursor cc = (Cursor)(s.getSelectedItem());
if (cc != null) {
text = cc.getString(cc.getColumnIndex("name"));
}
checker();
}
});
}
public void checker() {
if (text .equals("Create Name")){
i = new Intent(this, GetName.class);
spe.putString("name", text);
spe.commit();
startActivity(i);
}else{
spe.putString("name", text);
spe.commit();
i = new Intent(this, MoveForward.class);
startActivity(i);
}
}
private void fillSpinner(){
DbAdapter mDbHelper = new DbAdapter(this);
mDbHelper.open();
Cursor c = mDbHelper.fetchColumns(new String[] {"_id","name"});;
if (! c.moveToFirst()){
c.close();
mDbHelper.createRow("Create Name");
mDbHelper.close();
c = mDbHelper.fetchColumns(new String[] {"_id","name"});
}else{
mDbHelper.close();
}
// create an array to specify which fields we want to display
String[] from = new String[]{"name"};
// create an array of the display item we want to bind our data to
int[] to = new int[]{android.R.id.text1};
// create simple cursor adapter
SimpleCursorAdapter adapter =
new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, c, from, to);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// get reference to our spinner
s.setAdapter(adapter);
}
private void init() {
btnSpinner = (Button)findViewById(R.id.btnSpinner);
s = (Spinner) findViewById(R.id.spinner1);
}
}
这里是飞溅的活动，下载文件
public class Splash extends Activity{
String file_url = "http://ipaddress/xampp/uploads/";
Context context = this;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
Thread splashThread = new Thread() {
@Override
public void run() {
float percent = 0;
try {
int waited = 0;
int time = 1000;
while (waited < time) {
sleep(100);
waited += 100;
String perc = Integer.toString(waited/time);
}
} catch (InterruptedException e) {
// do nothing
} finally {
//if this is the apps first time running, get a list of names.
if(isFirstRun()){
PHPBuddy buddy = new PHPBuddy();
try {
buddy.downloadFile("database");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//ToDo add spared prefs editor to set isfirstrun to true
Intent i = new Intent();
i.setClassName("com.project",
"com.project.SBMain");
startActivity(i);
}else{
//make registered user page
Intent i = new Intent();
//ToDo add spared prefs editor to set isfrstrun to false
//ToDo add intent for true
}
finish();
}
}
};
splashThread.start();
}
public boolean isFirstRun(){
String rb = "isfirstrun";
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor spe;
spe = prefs.edit();
//spe.putBoolean("isfirstrun", true);
//boolean test = prefs.getBoolean(rb, true);
return true;//prefs.getBoolean(rb, true);
}
}
这里是PHP
<?php
$myFile = "requestslog.txt";
$fh = fopen($myFile, 'a') or die("can't open file");
fwrite($fh, "\n\n---------------------------------------------------------------\n");
foreach($_SERVER as $h=>$v)
if(ereg('HTTP_(.+)',$h,$hp))
fwrite($fh, "$h = $v\n");
fwrite($fh, "\r\n");
fwrite($fh, file_get_contents('php://input'));
fclose($fh);
echo "<html><head /><body><iframe src=\"$myFile\" style=\"height:100%; width:100%;\"> </iframe></body></html>"
?>
<?php
if (is_uploaded_file($_FILES['userfile']['tmp_name'])) {
echo "File ". $_FILES['userfile']['name'] ." uploaded successfully.\n";
move_uploaded_file ($_FILES['userfile'] ['tmp_name'], $_FILES['userfile'] ['name']);
} else {
echo "Possible file upload attack: ";
echo "filename '". $_FILES['userfile']['tmp_name'] . "'.";
print_r($_FILES);
}
?>
你在哪里写数据文件？所有这些代码都是数据库创建/插入。 –
getWritableDatabase（）似乎是一个可疑的嫌疑犯，是你的还是我不熟悉的Android调用？ –
getWritableDatabase（）是SQLiteOpenHelper（）中的一个方法http://developer.android.com/reference/android/database/sqlite/SQLiteOpenHelper。html – tricknology