我运行应用程序时遇到此错误。你能帮帮我吗
流程：com.abdallahmurad.quoter001，PID：6218 java.lang.Error：ErrorCopyingDataBase 在com.abdallahmurad.quoter001.DBHelper.createDataBase（DBHelper.java:123） 在com.abdallahmurad.quoter001.DBHelper。（DBHelper.java：65） 在com.abdallahmurad.quoter001.QuoterActivity.onCreate（QuoterActivity.java:77）
这是班级：
public class DBHelper extends SQLiteOpenHelper{
SQLiteDatabase db = null;
Context context = null;
static String packageName = "com.easwareapps.quoter";
private static String DB_PATH = "/data/data/" + packageName + "/databases/";
private static String DB_NAME ="quoter.db";
private static final int VERSION = 1;
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public DBHelper(Context context) {
super(context, DB_NAME, null, VERSION);
try{
this.context = context;
createDataBase();
}catch(Exception e){
e.printStackTrace();
}
}
public Cursor getQuotes(int tag, int author){
db = this.getReadableDatabase();
String authorFilter = (author == 0)?"":" and author._id=" + author;
String tagFilter = (tag == 0)?"":" INNER JOIN quotes_tags tag ON tag.quote=quote._id AND tag.tag=" + tag + " ";
String sql = "SELECT quote.quote, author.author, author._id, quote._id from quotes quote, authors author " + tagFilter + "where quote.author=author._id and quote.status=1 " + authorFilter;// + " ORDER BY RANDOM()";
return db.rawQuery(sql, null);
}
public String[] getRandomQuote(){
db = this.getReadableDatabase();
String sql = "SELECT quote.quote, author.author, author._id, quote._id from quotes quote, authors author where quote.author=author._id and quote.status=1 ORDER BY RANDOM() LIMIT 1";
Cursor c = db.rawQuery(sql, null);
if(c.moveToFirst()) {
return new String[]{c.getString(1), c.getString(0), c.getString(2), c.getString(3)};
}else{
return new String[]{"", "", "", ""};
}
}
public String[] getQuote(int id){
db = this.getReadableDatabase();
String sql = "SELECT quote.quote, author.author, author._id, quote._id from quotes quote, authors author where quote.author=author._id and quote.status=1 and quote._id=" + id;
Cursor c = db.rawQuery(sql, null);
if(c.moveToFirst()) {
return new String[]{c.getString(1), c.getString(0), c.getString(2), c.getString(3)};
}else{
return new String[]{"", "", "", ""};
}
}
public void createDataBase() throws IOException {
boolean mDataBaseExist = checkDataBase();
if(!mDataBaseExist) {
try {
copyDataBase();
Log.e("DB", "createDatabase database created");
}
catch (IOException mIOException) {
Log.d("Error", Log.getStackTraceString(mIOException));
throw new Error("ErrorCopyingDataBase");
}
}
}
private boolean checkDataBase() {
File dbFile = new File(DB_PATH + DB_NAME);
return dbFile.exists();
}
private void copyDataBase() throws IOException {
InputStream mInput = context.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
File dir = new File(DB_PATH);
if(!dir.exists()){
dir.mkdir();
}
OutputStream mOutput = new FileOutputStream(outFileName);
byte[] mBuffer = new byte[1024];
int mLength;
while ((mLength = mInput.read(mBuffer))>0)
{
mOutput.write(mBuffer, 0, mLength);
}
mOutput.flush();
mOutput.close();
mInput.close();
}
public Cursor getTags() {
db = this.getReadableDatabase();
String sql = "SELECT _id, tag from tags where status > 0";
return db.rawQuery(sql, null);
}
}
public class DBHelper extends SQLiteOpenHelper{
SQLiteDatabase db = null;
Context context = null;
static String packageName = "com.easwareapps.quoter";
private static String DB_PATH = "/data/data/" + packageName + "/databases/";
private static String DB_NAME ="quoter.db";
private static final int VERSION = 1;
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public DBHelper(Context context) {
super(context, DB_NAME, null, VERSION);
try{
this.context = context;
createDataBase();
}catch(Exception e){
e.printStackTrace();
}
}
public Cursor getQuotes(int tag, int author){
db = this.getReadableDatabase();
String authorFilter = (author == 0)?"":" and author._id=" + author;
String tagFilter = (tag == 0)?"":" INNER JOIN quotes_tags tag ON tag.quote=quote._id AND tag.tag=" + tag + " ";
String sql = "SELECT quote.quote, author.author, author._id, quote._id from quotes quote, authors author " + tagFilter + "where quote.author=author._id and quote.status=1 " + authorFilter;// + " ORDER BY RANDOM()";
return db.rawQuery(sql, null);
}
public String[] getRandomQuote(){
db = this.getReadableDatabase();
String sql = "SELECT quote.quote, author.author, author._id, quote._id from quotes quote, authors author where quote.author=author._id and quote.status=1 ORDER BY RANDOM() LIMIT 1";
Cursor c = db.rawQuery(sql, null);
if(c.moveToFirst()) {
return new String[]{c.getString(1), c.getString(0), c.getString(2), c.getString(3)};
}else{
return new String[]{"", "", "", ""};
}
}
public String[] getQuote(int id){
db = this.getReadableDatabase();
String sql = "SELECT quote.quote, author.author, author._id, quote._id from quotes quote, authors author where quote.author=author._id and quote.status=1 and quote._id=" + id;
Cursor c = db.rawQuery(sql, null);
if(c.moveToFirst()) {
return new String[]{c.getString(1), c.getString(0), c.getString(2), c.getString(3)};
}else{
return new String[]{"", "", "", ""};
}
}
public void createDataBase() throws IOException {
boolean mDataBaseExist = checkDataBase();
if(!mDataBaseExist) {
try {
copyDataBase();
Log.e("DB", "createDatabase database created");
}
catch (IOException mIOException) {
Log.d("Error", Log.getStackTraceString(mIOException));
throw new Error("ErrorCopyingDataBase");
}
}
}
private boolean checkDataBase() {
File dbFile = new File(DB_PATH + DB_NAME);
return dbFile.exists();
}
private void copyDataBase() throws IOException {
InputStream mInput = context.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
File dir = new File(DB_PATH);
if(!dir.exists()){
dir.mkdir();
}
OutputStream mOutput = new FileOutputStream(outFileName);
byte[] mBuffer = new byte[1024];
int mLength;
while ((mLength = mInput.read(mBuffer))>0)
{
mOutput.write(mBuffer, 0, mLength);
}
mOutput.flush();
mOutput.close();
mInput.close();
}
public Cursor getTags() {
db = this.getReadableDatabase();
String sql = "SELECT _id, tag from tags where status > 0";
return db.rawQuery(sql, null);
}
}
public class QuoterActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private static String BANERID ="ca-app-pub-5013563814074355/3472037827";
QuotesAdapter qa;
RecyclerView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quoter);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
//navigationView.addView();
lv = (RecyclerView)findViewById(R.id.quotesList);
lv.setLayoutManager(new LinearLayoutManager(this));
DBHelper dbh = new DBHelper(getApplicationContext());
Cursor tags = dbh.getTags();
int i = 0;
final Menu menu = navigationView.getMenu();
menu.add(R.id.tags, i, i, "All");
if(tags.moveToFirst()) {
do {
i++;
menu.add(R.id.tags, tags.getInt(0), i, tags.getString(1));
}while (tags.moveToNext());
}
qa = new QuotesAdapter(getApplicationContext(),
new DBHelper(getApplicationContext()).getQuotes(0, 0), this);
lv.setAdapter(qa);
menu.setGroupCheckable(R.id.tags, true, true);
int count = 0;
for (i = 0, count = navigationView.getChildCount(); i < count; i++) {
final View child = navigationView.getChildAt(i);
if (child != null && child instanceof ListView) {
final ListView menuView = (ListView) child;
final HeaderViewListAdapter adapter = (HeaderViewListAdapter) menuView.getAdapter();
final BaseAdapter wrapped = (BaseAdapter) adapter.getWrappedAdapter();
wrapped.notifyDataSetChanged();
}
}
new EANotificationManager().setAlarmIfNeeded(getApplicationContext());
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
saveScrollPositon();
super.onBackPressed();
}
}
@Override
public void onPause() {
saveScrollPositon();
super.onPause();
}
@Override
public void onResume() {
super.onResume();
scrollToLastPosition();
}
private void scrollToLastPosition(){
SharedPreferences pref = getSharedPreferences(getPackageName(), MODE_PRIVATE);
int y = pref.getInt("scroll-y", 0);
if(lv != null ){
//lv.smoothScrollToPosition(y);
lv.scrollToPosition(y);
}
}
private void saveScrollPositon(){
if(lv != null ){
int y = ((LinearLayoutManager)lv.getLayoutManager()).
findFirstCompletelyVisibleItemPosition();
SharedPreferences pref = getSharedPreferences(getPackageName(), MODE_PRIVATE);
SharedPreferences.Editor edit = pref.edit();
edit.putInt("scroll-y", y);
edit.commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.quoter, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
Intent settings = new Intent(this, SettingsActivity.class);
startActivity(settings);
return true;
}if (id == R.id.random) {
Intent random = new Intent(this, DailyQuoteActivity.class);
random.putExtra("from_quote", true);
startActivity(random);
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
lv.setAdapter(null);
qa = new QuotesAdapter(getApplicationContext(),
new DBHelper(getApplicationContext()).getQuotes(id, 0), this);
lv.setAdapter(qa);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.getMenu().getItem(id+1).setChecked(true);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
public void gotoWebsite(View v){
String url = "http://quoter.easwareapps.com";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}
}