我尝试将数据插入我的sqlite表，但我插入了一个问题
我的错误日志
02-12 10:55:47.927: V/aaaa(1273): zaza
02-12 10:55:47.927: I/Database(1273): sqlite returned: error code = 1, msg = no such table: users
02-12 10:55:47.957: E/Database(1273): Error inserting username=zaza
02-12 10:55:47.957: E/Database(1273): android.database.sqlite.SQLiteException: no such table: users: , while compiling: INSERT INTO users(username) VALUES(?);
02-12 10:55:47.957: E/Database(1273): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
02-12 10:55:47.957: E/Database(1273): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:92)
02-12 10:55:47.957: E/Database(1273): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:65)
02-12 10:55:47.957: E/Database(1273): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:83)
02-12 10:55:47.957: E/Database(1273): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:41)
02-12 10:55:47.957: E/Database(1273): at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1149)
02-12 10:55:47.957: E/Database(1273): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1569)
02-12 10:55:47.957: E/Database(1273): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1426)
02-12 10:55:47.957: E/Database(1273): at com.example.database.DatabaseMain$1$1.onClick(DatabaseMain.java:63)
02-12 10:55:47.957: E/Database(1273): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:159)
02-12 10:55:47.957: E/Database(1273): at android.os.Handler.dispatchMessage(Handler.java:99)
02-12 10:55:47.957: E/Database(1273): at android.os.Looper.loop(Looper.java:123)
02-12 10:55:47.957: E/Database(1273): at android.app.ActivityThread.main(ActivityThread.java:3683)
02-12 10:55:47.957: E/Database(1273): at java.lang.reflect.Method.invokeNative(Native Method)
02-12 10:55:47.957: E/Database(1273): at java.lang.reflect.Method.invoke(Method.java:507)
02-12 10:55:47.957: E/Database(1273): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-12 10:55:47.957: E/Database(1273): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-12 10:55:47.957: E/Database(1273): at dalvik.system.NativeStart.main(Native Method)
我正在使用edittext插入使用自定义对话框，我在log.v上显示的editttext显示
但为什么不能插入我的数据？
我的代码
public class DatabaseMain extends Activity {
private DataBaseHelper dbHelper;
SQLiteDatabase db;
//private CursorAdapter dataSource;
//put the table name and column in constants
public static final String TABLE_NAME = "users";
public static final String COLUMN_NAME = "username";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_database_main);
dbHelper = new DataBaseHelper (this);
//dbHelper.openDataBase();
db = dbHelper.getWritableDatabase();
ListView listdata= (ListView)findViewById(R.id.listView1);
Button btn = (Button)findViewById(R.id.button1);
btn.setOnClickListener(new View.OnClickListener() {
ContentValues values = new ContentValues();
public void onClick(View v) {
LayoutInflater inflater = DatabaseMain.this.getLayoutInflater();
final View v1 =inflater.inflate(R.layout.username , null) ;
new AlertDialog.Builder(DatabaseMain.this)
.setTitle("input your name:")
.setView(v1)
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dlg, int sumthin) {
EditText name = (EditText)v1.findViewById(R.id.name);
String your_name = name.getText().toString();
values.put(COLUMN_NAME,name);
db.insert(TABLE_NAME,null,values);
}
})
.show();
}
});
}
}
我正在使用文件中的数据库，然后我放入文件夹资产，然后我使用此代码复制
public class DataBaseHelper extends SQLiteOpenHelper{
private static String DB_PATH = "/data/data/com.example/databases/";
private static String DB_NAME = "MyDb";
private SQLiteDatabase myDataBase;
private final Context myContext;
private static DataBaseHelper sInstance = null;
public DataBaseHelper(Context context) {
super(context, DB_NAME, null, 1);
this.myContext = context;
}
public void createDataBase() throws IOException{
boolean dbExist = checkDataBase();
if(dbExist){
//do nothing - database already exist
}else{
this.getReadableDatabase();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;
try{
String myPath = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}catch(SQLiteException e){
//database does't exist yet.
}
if(checkDB != null){
checkDB.close();
}
return checkDB != null ? true : false;
}
private void copyDataBase() throws IOException{
//Open your local db as the input stream
InputStream myInput = myContext.getAssets().open(DB_NAME);
// Path to the just created empty db
String outFileName = DB_PATH + DB_NAME;
OutputStream myOutput = new FileOutputStream(outFileName);
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException{
String myPath = DB_PATH + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}
public Cursor select(String query) throws SQLException {
return myDataBase.rawQuery(query, null);
}
public void insert(String table, ContentValues values) throws SQLException {
myDataBase.insert(table, null, values);
}
public void delete(String table, String where) throws SQLException {
myDataBase.delete(table, where, null);
}
public void update(String table, ContentValues values, String where) {
myDataBase.update(table, values, where, null);
}
public void sqlCommand(String command) {
myDataBase.execSQL(command);
}
@Override
public synchronized void close() {
if(myDataBase != null)
myDataBase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public static DataBaseHelper instance() {
/*
if (sInstance == null) {
sInstance = new DataBaseHelper();
}
*/
return sInstance;
}
}
答案 0 :(得分：0)
您需要在插入表之前创建表：
android.database.sqlite.SQLiteException: no such table: users: , while compiling: INSERT INTO users(username) VALUES(?);
类似的东西：
db.execSQL("CREATE TABLE users(username varchar);");
答案 1 :(得分：0)
表示用户在数据库中没有表名，如果在创建数据库之后已经为db.execSQL("CREATE TABLE STATEMENT FOR USERS Table");这样的用户添加了create table语句。我会建议你再次uninstall你的应用和reinstall。它将在术语中创建具有新添加的表的数据库。