opener.java
package com.example.camp;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.util.Log;
public class opener extends SQLiteOpenHelper {
private static final String dbpath="\\data\\data\\com.example.camp\\databases\\";
private static String dbname="mok";
private SQLiteDatabase myDataBase;
static String tname="javap";
static String qn="ques";
static String a="ans";
private Context CON;
public opener(Context context) {
super(context, dbname, null, 3);
this.CON=context;
}
public void createDataBase() throws IOException{
boolean dbExist = checkDataBase();
if(dbExist){
Log.e("sd", "donothing db exist");
//do nothing - database already exist
}else{
//By calling this method and empty database will be created into the default system path
//of your application so we are gonna be able to overwrite that database with our database.
this.getReadableDatabase();
try {
Log.e("pt", "calling copy");
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;
Log.e("inside","chkdb");
try{
Log.e("incd", "eroo");
String myPath =dbpath +dbname;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}catch(SQLiteException e){
Log.e("l","dexist");
}
if(checkDB != null){
Log.e("incd", "if");
checkDB.close();
Log.e("",""+checkDB);
}
return checkDB != null ? true : false;
}
private void copyDataBase() throws IOException{
Log.e("inside","copydb");
InputStream myInput = CON.getAssets().open(dbname);
String outFileName = dbpath + dbname;
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
//transfer bytes from the inputfile to the outputfile
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{
//Open the database
String myPath = dbpath + dbname;
myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
}
@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) {
}
}
jump.java
package com.example.camp;
import java.io.IOException;
import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
public class jump extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_jump);
opener obj=new opener(this);
final SQLiteDatabase sqdb = obj.getWritableDatabase();
Log.e("ck1", "ok");
try{
Log.e("ck2", "ok");
obj.createDataBase();
}catch(IOException e){
Log.e("I/O", e.toString());
}
try{
obj.openDataBase();
}catch(Exception e)
{
Log.e("I/O2", e.toString());
}
try{
/*Cursor c = sqdb.query(opener.tname,
new String[] { opener.qn, opener.a },
null, null, null, null, null);
while (c.moveToNext()) {
// GET COLUMN INDICES + VALUES OF THOSE COLUMNS
int id = c.getInt(c.getColumnIndex(opener.qn));
String name =
c.getString(c.getColumnIndex(opener.a));
Log.i("LOG_TAG", "ROW " + id + " HAS NAME " + name);
*/
//}\
}catch(Exception e){
Log.e("ck3",e.toString());
}
}}
栈跟踪
08-15 03:22:44.030: I/dalvikvm(1149): threadid=3: reacting to signal 3
08-15 03:22:44.160: I/dalvikvm(1149): Wrote stack traces to '/data/anr/traces.txt'
08-15 03:22:44.330: E/ck1(1149): ok
08-15 03:22:44.330: E/ck2(1149): ok
08-15 03:22:44.330: E/inside(1149): chkdb
08-15 03:22:44.340: E/incd(1149): eroo
08-15 03:22:44.340: I/SqliteDatabaseCpp(1149): sqlite returned: error code = 14, msg = cannot open file at line 27701 of [8609a15dfa], db=/data/data/com.example.camp/databases/camprep
08-15 03:22:44.340: I/SqliteDatabaseCpp(1149): sqlite returned: error code = 14, msg = os_unix.c: open() at line 27701 - "" errno=2 path=//\data\data\com.example.camp\databases\camprep, db=/data/data/com.example.camp/databases/camprep
08-15 03:22:44.340: E/SqliteDatabaseCpp(1149): sqlite3_open_v2("\data\data\com.example.camp\databases\camprep", &handle, 1, NULL) failed
08-15 03:22:44.351: E/SQLiteDatabase(1149): Failed to open the database. closing it.
08-15 03:22:44.351: E/SQLiteDatabase(1149): android.database.sqlite.SQLiteCantOpenDatabaseException: unable to open database file
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.database.sqlite.SQLiteDatabase.dbopen(Native Method)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1013)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:986)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:962)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at com.example.camp.opener.checkDataBase(opener.java:77)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at com.example.camp.opener.createDataBase(opener.java:37)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at com.example.camp.jump.onCreate(jump.java:24)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.app.Activity.performCreate(Activity.java:4465)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.app.ActivityThread.access$600(ActivityThread.java:123)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.os.Handler.dispatchMessage(Handler.java:99)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.os.Looper.loop(Looper.java:137)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at android.app.ActivityThread.main(ActivityThread.java:4424)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at java.lang.reflect.Method.invokeNative(Native Method)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at java.lang.reflect.Method.invoke(Method.java:511)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
08-15 03:22:44.351: E/SQLiteDatabase(1149): at dalvik.system.NativeStart.main(Native Method)
08-15 03:22:44.351: E/l(1149): dexist
08-15 03:22:44.351: E/pt(1149): calling copy
08-15 03:22:44.351: E/inside(1149): copydb
08-15 03:22:44.360: E/unable(1149): copydbjava.io.FileNotFoundException: camprep
08-15 03:22:44.360: D/AndroidRuntime(1149): Shutting down VM
08-15 03:22:44.360: W/dalvikvm(1149): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
08-15 03:22:44.370: E/AndroidRuntime(1149): FATAL EXCEPTION: main
08-15 03:22:44.370: E/AndroidRuntime(1149): java.lang.Error: Error copying database
08-15 03:22:44.370: E/AndroidRuntime(1149): at com.example.camp.opener.createDataBase(opener.java:56)
08-15 03:22:44.370: E/AndroidRuntime(1149): at com.example.camp.jump.onCreate(jump.java:24)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.app.Activity.performCreate(Activity.java:4465)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.app.ActivityThread.access$600(ActivityThread.java:123)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.os.Handler.dispatchMessage(Handler.java:99)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.os.Looper.loop(Looper.java:137)
08-15 03:22:44.370: E/AndroidRuntime(1149): at android.app.ActivityThread.main(ActivityThread.java:4424)
08-15 03:22:44.370: E/AndroidRuntime(1149): at java.lang.reflect.Method.invokeNative(Native Method)
08-15 03:22:44.370: E/AndroidRuntime(1149): at java.lang.reflect.Method.invoke(Method.java:511)
08-15 03:22:44.370: E/AndroidRuntime(1149): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
08-15 03:22:44.370: E/AndroidRuntime(1149): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
08-15 03:22:44.370: E/AndroidRuntime(1149): at dalvik.system.NativeStart.main(Native Method)
08-15 03:22:44.530: I/dalvikvm(1149): threadid=3: reacting to signal 3
08-15 03:22:44.560: I/dalvikvm(1149): Wrote stack traces to '/data/anr/traces.txt'
08-15 03:22:44.979: I/dalvikvm(1149): threadid=3: reacting to signal 3
08-15 03:22:44.989: I/dalvikvm(1149): Wrote stack traces to '/data/anr/traces.txt'