我必须从Sqlite数据库中获取文本，并且每个特殊的拉丁字符（即à，ò，ù，è...）都显示为带有“？”的黑色方块。内部。
如何才能正确显示？
我在下面使用了DatabaseHelper：
public class VocabTesterDatabaseHelper extends SQLiteOpenHelper {
private static String DB_PATH = "data/data/com.VoacabTester/databases/";
private static String DB_NAME = "vocabdb.db";
private SQLiteDatabase vocabDatabase;
private final Context vocabContext;
public VocabTesterDatabaseHelper(Context context) {
super(context, DB_NAME, null, 3);
this.vocabContext = context;
}
public void createDataBase() throws IOException {
boolean dbExist = checkDataBase();
if (dbExist) {
} else {
this.getReadableDatabase();
copyDataBase();
}
}
private boolean checkDataBase() {
File dbFile = new File(DB_PATH + DB_NAME);
return dbFile.exists();
}
private void copyDataBase() throws IOException {
try {
InputStream myInput = vocabContext.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
// Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer)) > 0) {
myOutput.write(buffer, 0, length);
}
myOutput.flush();
myOutput.close();
myInput.close();
} catch (IOException e) {
Log.v("data", e.toString().concat("sql"));
}
}
public void openDataBase() throws SQLException {
// Open the database
String myPath = DB_PATH + DB_NAME;
vocabDatabase = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READONLY);
}
public Cursor getFoundationTierQuestions() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM FoundationTierVocabularyQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
};
public Cursor getHigherTierQuestions() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM HigherTierQuestions ORDER BY Random()", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getEasyFirstConjugationVerbs() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM VerbQuestions1stConjugation ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getEasySecondConjugationVerbs() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM VerbQuestions2ndConjugation ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getEasyThirdConjugationVerbs() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM VerbQuestions3rdConjugation ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getEasyFourthConjugationVerbs() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM VerbQuestions4thConjugation ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getEasyMixConjugationVerbs() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM VerbQuestionsallConjugation ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getEasyIrregularConjugationVerbs() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM IrregularVerbsQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getFirstDeclensionNounsQuestions() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM FirstDeclensionNounsQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getSecondDeclensionNounsQuestions() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM SecondDeclensionNounsQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getThirdDeclensionNounsQuestions() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM ThirdDeclensionNounsQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getFourthDeclensionNounsQuestions() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM FourthDeclensionNounsQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getFifthDeclensionNounsQuestions() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM FifthDeclensionNounsQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getNounsAllDeclensionNounsQuestions() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM NounsDeclensionNounsQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getis_ea_idQuestions() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM IsEaIdQuestions ORDER BY Random()", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor gethic_haec_hocQuestions() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM HicHaecHocQuestions ORDER BY Random()", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getille_illa_illudQuestions() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM IlleIllaIlludQuestions ORDER BY Random()", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getqui_quae_quodQuestions() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM QuiQuaeQuodQuestions ORDER BY Random()", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getIdem_eadem_idemQuestions() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM IdemEademIdemQuestions ORDER BY Random()", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getipse_ipsa_ipsumQuestions() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM IpseIpsaIpsumQuestions ORDER BY Random()", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getalius_alia_aliudQuestions() {
Cursor cur;
cur = vocabDatabase
.rawQuery(
"SELECT * FROM AliusAliaAliudQuestions ORDER BY Random()",
null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAdjectiveQuestions() {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM AdjectivesQuestions ORDER BY Random()", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerFirstDeclensionNounsQuestion(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM FirstDeclensionNounsQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getSAnswerecondDeclensionNounsQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM SecondDeclensionNounsQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerThirdDeclensionNounsQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM ThirdDeclensionNounsQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerFourthDeclensionNounsQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM FourthDeclensionNounsQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerFifthDeclensionNounsQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM FifthDeclensionNounsQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerNounsAllDeclensionNounsQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM NounsDeclensionNounsQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnsweris_ea_idQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM IsEaIdQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerhic_haec_hocQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM HicHaecHocQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerille_illa_illudQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM IlleIllaIlludQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerqui_quae_quodQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM QuiQuaeQuodQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerIdem_eadem_idemQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM IdemEademIdemQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnsweripse_ipsa_ipsumQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM IpseIpsaIpsumQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnsweralius_alia_aliudQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM AliusAliaAliudQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
public Cursor getAnswerAdjectiveQuestions(String question) {
Cursor cur;
cur = vocabDatabase.rawQuery(
"SELECT * FROM AdjectivesQuestions WHERE Question LIKE '"
+ question + "'", null);
cur.moveToFirst();
vocabDatabase.close();
return cur;
}
@Override
public synchronized void close() {
if (vocabDatabase != null)
vocabDatabase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
我在下面使用了Activity类：
public class VocabTesterAdjectiveActivity extends Activity {
private TextView question;
private TextView stats;
private Button skipButton;
private Button finishButton;
final VocabTesterDatabaseHelper dbObj = new VocabTesterDatabaseHelper(this);
Cursor questionCursor;
Cursor answerCursor;
Button userAnserButtoon;
AlertDialog alertDialog;
String adjectiveNumber;
String adjectiveCase;
String adjectiveGender;
int totalNumberOfQuestions = 0;
int totalRightQuestions = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.adjective_test);
question = (TextView) findViewById(R.id.QuestionView);
stats = (TextView) findViewById(R.id.TotalView);
skipButton = (Button) findViewById(R.id.skipButton);
finishButton = (Button) findViewById(R.id.finishButton);
userAnserButtoon = (Button) findViewById(R.id.enterButton);
alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setMessage("No More Questions");
alertDialog.setTitle("Finish");
skipButton.setOnClickListener(skipClickListener);
finishButton.setOnClickListener(finishClickListener);
userAnserButtoon.setOnClickListener(answerClickListener);
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
getAllQuestions();
displayTestQuestion();
}
private void displayTestQuestion() {
resetEverything();
stats.setText(Integer.toString(totalRightQuestions) + "/"
+ Integer.toString(totalNumberOfQuestions));
String questionText = questionCursor.getString(0);
question.setText(questionText);
//question.setText(Html.fromHtml(questionText));
adjectiveNumber = questionCursor.getString(1);
adjectiveCase = questionCursor.getString(3);
adjectiveGender = questionCursor.getString(2);
}
private void resetEverything() {
RadioGroup adjectiveNumberList = (RadioGroup) findViewById(R.id.adjectiveNumberList);
adjectiveNumberList.clearCheck();
RadioGroup adjectiveCaseList = (RadioGroup) findViewById(R.id.adjectiveCaseList);
adjectiveCaseList.clearCheck();
RadioGroup adjectiveGenderList = (RadioGroup) findViewById(R.id.adjectiveGenderList);
adjectiveGenderList.clearCheck();
userAnserButtoon.getBackground().setColorFilter(Color.GRAY,
Mode.MULTIPLY);
}
private void getAllQuestions() {
try {
dbObj.createDataBase();
} catch (IOException e) {
e.printStackTrace();
}
dbObj.openDataBase();
questionCursor = dbObj.getAdjectiveQuestions();
}
private OnClickListener finishClickListener = new OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(VocabTesterAdjectiveActivity.this,
VocabTesterHomeActivity.class);
startActivity(i);
}
};
private OnClickListener skipClickListener = new OnClickListener() {
public void onClick(View v) {
if (!questionCursor.isLast()) {
questionCursor.moveToNext();
totalNumberOfQuestions++;
displayTestQuestion();
} else {
alertDialog.setMessage("No More Questions");
alertDialog.show();
}
}
};
private OnClickListener answerClickListener = new OnClickListener() {
public void onClick(View v) {
String useSelectedNumber = "";
String useSelectedCase = "";
String useSelectedGender = "";
RadioGroup adjectiveNumberList = (RadioGroup) findViewById(R.id.adjectiveNumberList);
int count = adjectiveNumberList.getChildCount();
for (int i = 0; i < count; i++) {
View radio = adjectiveNumberList.getChildAt(i);
if (radio instanceof RadioButton) {
if (((RadioButton) radio).isChecked()) {
useSelectedNumber = ((String) ((RadioButton) radio)
.getText()).toLowerCase();
break;
}
}
}
RadioGroup adjectiveCaseList = (RadioGroup) findViewById(R.id.adjectiveCaseList);
count = adjectiveCaseList.getChildCount();
for (int i = 0; i < count; i++) {
View radio = adjectiveCaseList.getChildAt(i);
if (radio instanceof RadioButton) {
if (((RadioButton) radio).isChecked()) {
useSelectedCase = ((String) ((RadioButton) radio)
.getText()).toLowerCase();
break;
}
}
}
RadioGroup adjectiveGenderList = (RadioGroup) findViewById(R.id.adjectiveGenderList);
count = adjectiveGenderList.getChildCount();
for (int i = 0; i < count; i++) {
View radio = adjectiveGenderList.getChildAt(i);
if (radio instanceof RadioButton) {
if (((RadioButton) radio).isChecked()) {
useSelectedGender = ((String) ((RadioButton) radio)
.getText()).toLowerCase();
break;
}
}
}
dbObj.openDataBase();
answerCursor = dbObj.getAnswerAdjectiveQuestions(questionCursor
.getString(0));
boolean isCorrect = false;
while (!answerCursor.isLast()) {
if (useSelectedNumber.equals(answerCursor.getString(1))
&& useSelectedGender.equals(answerCursor.getString(2))
&& useSelectedCase.equals(answerCursor.getString(3))) {
isCorrect = true;
break;
}
answerCursor.moveToNext();
}
if (useSelectedNumber.equals(answerCursor.getString(1))
&& useSelectedGender.equals(answerCursor.getString(2))
&& useSelectedCase.equals(answerCursor.getString(3))) {
isCorrect = true;
}
if (isCorrect) {
userAnserButtoon.getBackground().setColorFilter(Color.GREEN,
Mode.MULTIPLY);
totalRightQuestions++;
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
if (!questionCursor.isLast()) {
questionCursor.moveToNext();
totalNumberOfQuestions++;
displayTestQuestion();
} else {
alertDialog.setMessage("No More Questions");
alertDialog.show();
}
}
}, 1000);
} else {
userAnserButtoon.getBackground().setColorFilter(Color.RED,
Mode.MULTIPLY);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
totalNumberOfQuestions++;
displayTestQuestion();
}
}, 1000);
}
}
};
}
答案 0 :(得分：0)
尝试更改文件编码格式：
System.setProperty("file.encoding","Latin-1");