0
나는 안드로이드에 대한 정보를 SQLite 데이터베이스에 저장하는 안드로이드를 개발했습니다. 모든 것이 내 4.0.3 전화 및 4.0.3 AVD에서 제대로 작동하는 것으로 보이지만 Jelly Bean 및 최신 버전에서도 작동하고 싶습니다. 응용 프로그램은 정말 아무것도 매우 복잡한 일을하지 않습니다. (http://www.androiddesignpatterns.com/2012/05/correctly-managing-your-sqlite-database.html) 내가 어떻게 든 인스턴스 문제가 있다고 생각 구글에서 내 초기 검색에서안드로이드 애플 리케이션 SQLite와 ICS에서 실행하지만 젤리가 실행되지 않습니다 - IllegalStateException
09-05 01:45:40.311: W/dalvikvm(1062): threadid=1: thread exiting with uncaught exception >(group=0x414c4700) 09-05 01:45:40.331: E/AndroidRuntime(1062): FATAL EXCEPTION: main 09-05 01:45:40.331: E/AndroidRuntime(1062): java.lang.RuntimeException: Unable to start >activity ComponentInfo{ard.util.fueltracker/ard.util.fueltracker.TitleScreenActivity}: >java.lang.IllegalStateException: attempt to re-open an already-closed object: >SQLiteDatabase: /data/data/ard.util.fueltracker/databases/vehicleDatabase 09-05 01:45:40.331: E/AndroidRuntime(1062): at >android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
, 그래서 여기에 접근 # 1을 따라 : 나는 에뮬레이트 된 젤리 콩 장치에 응용 프로그램을 불 때 나는 치명적인 예외 오류가 발생 , 그러나 이것은 차이를 만드는 것처럼 보이지 않습니다. 변경 사항이있는 ICS에서도 여전히 작동합니다.
package ard.util.fueltracker;
import java.util.List;
import ard.util.fueltracker.util.SystemUiHider;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.content.Intent;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;
/**
* An example full-screen activity that shows and hides the system UI (i.e.
* status bar and navigation/system bar) with user interaction.
*
* @see SystemUiHider
*/
@SuppressLint("NewApi")
public class TitleScreenActivity extends Activity implements OnItemSelectedListener {
/**
* Whether or not the system UI should be auto-hidden after
* {@link #AUTO_HIDE_DELAY_MILLIS} milliseconds.
*/
private static final boolean AUTO_HIDE = false;
/**
* If {@link #AUTO_HIDE} is set, the number of milliseconds to wait after
* user interaction before hiding the system UI.
*/
private static final int AUTO_HIDE_DELAY_MILLIS = 3000;
/**
* If set, will toggle the system UI visibility upon interaction. Otherwise,
* will show the system UI visibility upon interaction.
*/
private static final boolean TOGGLE_ON_CLICK = false;
/**
* The flags to pass to {@link SystemUiHider#getInstance}.
*/
//private static final int HIDER_FLAGS = SystemUiHider.FLAG_HIDE_NAVIGATION;
private static final int HIDER_FLAGS = 0;
/**
* The instance of the {@link SystemUiHider} for this activity.
*/
private SystemUiHider mSystemUiHider;
// Spinner element
Spinner spinner;
// Buttons
Button btnAdd;
Button btnLogo;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR); //new
getActionBar().hide(); //new
getWindow().setFlags(
WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_title_screen);
// Spinner element
spinner = (Spinner) findViewById(R.id.titleSelectionSpinner);
// buttons
btnAdd = (Button) findViewById(R.id.button_go);
btnLogo = (Button) findViewById(R.id.button_ard_logo);
// Spinner click listener
spinner.setOnItemSelectedListener(this);
// Check for Add New Vehicle entry to create menu option in drop down list
checkAddNewVehicle();
// Loading spinner data from database
loadSpinnerData();
//"Go" button actions
btnAdd.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
//Starting a new Intent
Intent screenAddVehicle = new Intent(getApplicationContext(), AddVehicleActivity.class);
Intent screenRecordViewing = new Intent(getApplicationContext(), RecordViewing.class);
String SpinnerChoice = spinner.getSelectedItem().toString();
//Sending data to another Activity
//store value of vehicle label for Record Viewing screen
screenRecordViewing.putExtra("vehicleLabel", SpinnerChoice);
//interpret Spinner choice as Menu items
//"Add New Vehicle" always at Position 0
if (SpinnerChoice == spinner.getItemAtPosition(0).toString()) {
startActivity(screenAddVehicle);
} else {
//display value of selection if not "Add New Vehicle"
//Toast.makeText(spinner.getContext(), "Selection:" + SpinnerChoice, Toast.LENGTH_LONG).show();
//go to Record Viewing screen
startActivity(screenRecordViewing);
}
}
});
//"Logo" button - display program copyright
btnLogo.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Toast.makeText(getApplicationContext(), "FuelTracker is Copyright 2013 by Authentic Ruby Designs", Toast.LENGTH_LONG).show();
}
});
final View controlsView = findViewById(R.id.fullscreen_content_controls);
final View contentView = findViewById(R.id.fullscreen_content);
// Set up an instance of SystemUiHider to control the system UI for
// this activity.
mSystemUiHider = SystemUiHider.getInstance(this, contentView,
HIDER_FLAGS);
mSystemUiHider.setup();
mSystemUiHider
.setOnVisibilityChangeListener(new SystemUiHider.OnVisibilityChangeListener() {
// Cached values.
int mControlsHeight;
int mShortAnimTime;
@Override
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
public void onVisibilityChange(boolean visible) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
// If the ViewPropertyAnimator API is available
// (Honeycomb MR2 and later), use it to animate the
// in-layout UI controls at the bottom of the
// screen.
if (mControlsHeight == 0) {
mControlsHeight = controlsView.getHeight();
}
if (mShortAnimTime == 0) {
mShortAnimTime = getResources().getInteger(
android.R.integer.config_shortAnimTime);
}
controlsView
.animate()
.translationY(visible ? 0 : mControlsHeight)
.setDuration(mShortAnimTime);
} else {
// If the ViewPropertyAnimator APIs aren't
// available, simply show or hide the in-layout UI
// controls.
controlsView.setVisibility(visible ? View.VISIBLE
: View.GONE);
}
if (visible && AUTO_HIDE) {
// Schedule a hide().
delayedHide(AUTO_HIDE_DELAY_MILLIS);
}
}
});
// Set up the user interaction to manually show or hide the system UI.
contentView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (TOGGLE_ON_CLICK) {
mSystemUiHider.toggle();
} else {
mSystemUiHider.show();
}
}
});
// Upon interacting with UI controls, delay any scheduled hide()
// operations to prevent the jarring behavior of controls going away
// while interacting with the UI.
findViewById(R.id.button_go).setOnTouchListener(
mDelayHideTouchListener);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Trigger the initial hide() shortly after the activity has been
// created, to briefly hint to the user that UI controls
// are available.
//delayedHide(100);
}
/**
* Touch listener to use for in-layout UI controls to delay hiding the
* system UI. This is to prevent the jarring behavior of controls going away
* while interacting with activity UI.
*/
View.OnTouchListener mDelayHideTouchListener = new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (AUTO_HIDE) {
delayedHide(AUTO_HIDE_DELAY_MILLIS);
}
return false;
}
};
Handler mHideHandler = new Handler();
Runnable mHideRunnable = new Runnable() {
@Override
public void run() {
mSystemUiHider.hide();
}
};
/**
* Schedules a call to hide() in [delay] milliseconds, canceling any
* previously scheduled calls.
*/
private void delayedHide(int delayMillis) {
mHideHandler.removeCallbacks(mHideRunnable);
mHideHandler.postDelayed(mHideRunnable, delayMillis);
}
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
/**
* Function to check that Add New Vehicle is the first label in the DB table
*/
private void checkAddNewVehicle() {
// database handler
//DatabaseHandler db = new DatabaseHandler(getApplicationContext());
DatabaseHandler db = DatabaseHandler.getInstance(getApplicationContext());
// table data
List<String> labels = db.getAllLabels();
//Check for "Add New Vehicle" entry at first row of table
if (labels.isEmpty()) {
db.insertLabel("Add New Vehicle");
}
}
/**
* Function to load the spinner data from SQLite database
* */
private void loadSpinnerData() {
// database handler
//DatabaseHandler db = new DatabaseHandler(getApplicationContext());
DatabaseHandler db = DatabaseHandler.getInstance(getApplicationContext());
// Spinner Drop down elements
List<String> labels = db.getAllLabels();
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, labels);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
spinner.setAdapter(dataAdapter);
}
}
그리고 여기 내 DatabaseHandler 클래스의 : 여기
내 TitleScreenActivity의 코드입니다 그것의 일부는 아마 추한 모습package ard.util.fueltracker;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.widget.TableLayout;
public class DatabaseHandler extends SQLiteOpenHelper {
//create static instance
private static DatabaseHandler mInstance = null;
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "vehicleDatabase";
// Labels table name
private static final String TABLE_LABELS = "labels";
// Fuel Data table name
private static final String TABLE_FUELDATA = "fuel_data";
// Labels Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_NAME = "name";
// Fuel Data Tables Columns names
private static final String KEY_ENTRY = "entry_id";
private static final String FIELD_VEHICLEID = "vehicle_id";
private static final String FIELD_DATE = "date";
private static final String FIELD_FTYPE = "fuel_type";
private static final String FIELD_BRAND = "brand";
private static final String FIELD_PRICE = "price";
private static final String FIELD_KMS = "kms";
private static final String FIELD_LITRES = "litres";
private static final String FIELD_LPER = "l_per";
private static final String FIELD_MPG = "mpg";
// Fuel Data Columns for display - query shorthand
private static final String[] fuelDataDisplayCols = { FIELD_DATE, FIELD_FTYPE, FIELD_BRAND, FIELD_PRICE,
FIELD_KMS, FIELD_LITRES, FIELD_LPER, FIELD_MPG };
public static DatabaseHandler getInstance(Context ctx) {
//Use the application context to avoid leaking Activity's context
if (mInstance == null) {
mInstance = new DatabaseHandler(ctx.getApplicationContext());
}
return mInstance;
}
private DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
// Category table create query
String CREATE_CATEGORIES_TABLE = "CREATE TABLE " + TABLE_LABELS + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT)";
db.execSQL(CREATE_CATEGORIES_TABLE);
// Fuel Data table create query
String CREATE_FUELDATA_TABLE = "CREATE TABLE " + TABLE_FUELDATA + "("
+ KEY_ENTRY + " INTEGER PRIMARY KEY," + FIELD_VEHICLEID + " INTEGER,"
+ FIELD_DATE + " TEXT," + FIELD_FTYPE + " TEXT," + FIELD_BRAND +
" TEXT," + FIELD_PRICE + " REAL," + FIELD_KMS + " REAL,"
+ FIELD_LITRES + " REAL," + FIELD_LPER + " REAL," + FIELD_MPG +
" REAL)";
db.execSQL(CREATE_FUELDATA_TABLE);
db.close();
}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_LABELS);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_FUELDATA);
// Create tables again
onCreate(db);
}
/**
* Inserting new label into Labels table
* */
public void insertLabel(String label){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, label);
// Inserting Row
db.insert(TABLE_LABELS, null, values);
db.close(); // Closing database connection
}
/**
* Inserting entry data into Fuel Data table
*/
//public void insertFuelData(int vehicleID, String date, String ftype, String brand,
// float price, float kms, float litres) {
public void insertFuelData(ArrayList<String> fuelEntryData) {
SQLiteDatabase dbWrite = this.getWritableDatabase();
ArrayList<String> fuelEntry = fuelEntryData;
ContentValues values = new ContentValues();
//turn array values into individual field values with correct datatype
int vehicleID = getVehicleID(fuelEntry.get(0));
String date = fuelEntry.get(1);
String ftype = fuelEntry.get(2);
String brand = fuelEntry.get(3);
double price = Double.parseDouble((fuelEntry.get(4)));
double kms = Double.parseDouble((fuelEntry.get(5)));
double litres = Double.parseDouble((fuelEntry.get(6)));
//values for calculations
double lper;
double mpg;
//Format calculations to round to one significant digit
DecimalFormat df = new DecimalFormat("###.#");
//calculate Liters/100Kilometres
lper = (100/(kms/litres));
//calculate U.S. Miles Per Gallon
mpg = (kms/litres) * 2.35;
//Prepare data and Insert row into table
values.put(FIELD_VEHICLEID, vehicleID);
values.put(FIELD_DATE, date);
values.put(FIELD_FTYPE, ftype);
values.put(FIELD_BRAND, brand);
values.put(FIELD_PRICE, price);
values.put(FIELD_KMS, kms);
values.put(FIELD_LITRES, litres);
values.put(FIELD_LPER, df.format(lper));
values.put(FIELD_MPG, df.format(mpg));
dbWrite.insert(TABLE_FUELDATA, null, values);
dbWrite.close();
}
/**
* Getting all labels
* returns list of labels
* */
public List<String> getAllLabels(){
List<String> labels = new ArrayList<String>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_LABELS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
labels.add(cursor.getString(1));
} while (cursor.moveToNext());
}
// closing connection
cursor.close();
db.close();
// returning lables
return labels;
}
/**
* Get entries based on vehicle id
*/
public List<List<String>> getFuelData(int vehicleID) {
//List of Lists - each row/entry of data is a separate List
List<List<String>> fuelDataTable = new ArrayList<List<String>>();
List<String> fuelDataRow = new ArrayList<String>();
//Select Query
String selectQuery = "SELECT * FROM " + TABLE_FUELDATA +
" WHERE vehicle_id = ? ";
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, new String[] { String.valueOf(vehicleID) });
// looping through all rows and 9 columns (not incl key) and adding to list
if (cursor.moveToFirst()) {
do {
for(int i = 1; i < 10; i++) {
//doesn't work with non-string values
//fuelDataRow.add(cursor.getString(i));
}
//add each row in its entirety to the List; multi-dimenionsal list
fuelDataTable.add(fuelDataRow);
//empty fuelDataRow
fuelDataRow.clear();
} while (cursor.moveToNext());
}
// closing connection
cursor.close();
db.close();
//return data
return fuelDataTable;
}
public List<String> getFuelDataRows(int vehicleID) {
List<String> fuelDataTable = new ArrayList<String>();
SQLiteDatabase db = this.getReadableDatabase();
//Get data from database table
Cursor c = db.query(TABLE_FUELDATA, fuelDataDisplayCols, " vehicle_id=? ", new String[] { String.valueOf(vehicleID) }, null, null, FIELD_DATE);
//Insert Header row into Array
fuelDataTable.add("Date");
fuelDataTable.add("Type");
fuelDataTable.add("Brand");
fuelDataTable.add("Price");
fuelDataTable.add("KMs");
fuelDataTable.add("Litres");
fuelDataTable.add("L/100");
fuelDataTable.add("MPG");
//Go to beginning of Cursor data and loop through
c.moveToFirst();
while (!c.isAfterLast()) {
//add each cell in the row to List array
fuelDataTable.add(c.getString(c.getColumnIndex(FIELD_DATE)));
fuelDataTable.add(c.getString(c.getColumnIndex(FIELD_FTYPE)));
fuelDataTable.add(c.getString(c.getColumnIndex(FIELD_BRAND)));
fuelDataTable.add(String.valueOf(c.getDouble(c.getColumnIndex(FIELD_PRICE))));
fuelDataTable.add(String.valueOf(c.getDouble(c.getColumnIndex(FIELD_KMS))));
fuelDataTable.add(String.valueOf(c.getDouble(c.getColumnIndex(FIELD_LITRES))));
fuelDataTable.add(String.valueOf(c.getDouble(c.getColumnIndex(FIELD_LPER))));
fuelDataTable.add(String.valueOf(c.getDouble(c.getColumnIndex(FIELD_MPG))));
c.moveToNext();
}
// Make sure to close the cursor
c.close();
db.close();
return fuelDataTable;
}
public int getVehicleID(String label) {
// set variables
SQLiteDatabase dbReader = this.getReadableDatabase();
String vLabel = label;
//Query String
String selectQuery = "SELECT " + KEY_ID + " FROM " + TABLE_LABELS +
" WHERE name = ? ";
Cursor c = dbReader.rawQuery(selectQuery, new String[] { vLabel });
//avoid out of bounds exception
c.moveToFirst();
//extract value as integer
int vID = c.getInt(c.getColumnIndex(KEY_ID));
c.close();
return vID;
}
}
- 이것이 내 첫 번째 응용 프로그램 프로젝트와 이클립스 자동으로 입력 일부 창조의 방법의 - 그러나 그것은 아이스크림 샌드위치에서 잘 작동하고 있습니다.
모든 단서를 보내 주셔서 감사합니다.
그게 전부 였어! 그렇게 간단한 솔루션 이었기 때문에 기쁩니다. 원래 ICS 기계에서 계속 작동하지만 새로운 Jellybean에서는 작동하지 않는 특별한 이유가 있습니까? 그것은 OS 때문입니까 아니면 에뮬레이터 소프트웨어 때문입니까? – mrmacross
잘 모르겠지만, onCreate (db), onUpgrade() 등의 메소드를 아는 한 데이터베이스 객체를 params로받는 곳과 같이, 프레임 워크가 명시 적으로 db를 닫을 필요가 없습니다. 이. – Varun