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嗨，我有一个问题，当插入一个android图像在我的数据库quizz应用程序。问题必须出现一个特定的图像，我特里做有人解释我在这里，但我有一个错误我的方法，我添加questions.I插入图像像这样。在sqlite数据库中添加图像
这是我的数据库
package com.example.toureamidou.piste;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
/**
* Created by TOURE Amidou on 24/02/2016.
*/
public class DatabaseHelper extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "Question";
private static final String TABLE_QUEST = "quest";
private static final String KEY_ID = "id";
private static final String KEY_QUES = "question";
private static final String KEY_ANSWER = "answer";
private static final String KEY_OPTA= "opta";
private static final String KEY_OPTB= "optb";
private static final String KEY_OPTC= "optc";
private static final String KEY_IMAGE = "image";
private SQLiteDatabase dbase;
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
dbase=db;
String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_QUEST + " ("
+ KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_QUES
+ " TEXT, " + KEY_ANSWER+ " TEXT, "+KEY_OPTA +" TEXT, "
+KEY_OPTB +" TEXT, "+KEY_OPTC+" TEXT,"+KEY_IMAGE+"TEXT)";
db.execSQL(sql);
addQuestions();
}
private void addQuestions() {
Questions q1=new Questions("FFFFF","Tata", "Titi", "Toto", "Tata");
this.addQuestion(q1);
Questions q2=new Questions("Quel est le plus grand pays au monde", "Suisse", "Italie", "Chine", "Chine");
this.addQuestion(q2);
Questions q3=new Questions("Comment s'appele le président francais","Obama", "Hollande","Gorbatchev", "Hollande");
this.addQuestion(q3);
Questions q4=new Questions("zzzzzzzzzzzzzzzzzzzz", "ali", "dede", "home","dede");
this.addQuestion(q4);
Questions q5=new Questions(" est l'homme le plus riche au monde","Gates","Trump","Carlos Slim","Trump");
this.addQuestion(q5);
}
private void addQuestion(Questions quest,byte[] image) {
Log.d("addQuestions", quest.toString());
ContentValues values = new ContentValues();
values.put(KEY_QUES, quest.getQUESTION());
values.put(KEY_ANSWER, quest.getANSWER());
values.put(KEY_OPTA, quest.getOPTA());
values.put(KEY_OPTB, quest.getOPTB());
values.put(KEY_OPTC, quest.getOPTC());
values.put(KEY_IMAGE,image);
dbase.insert(TABLE_QUEST, null, values);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_QUEST);
onCreate(db);
}
public List<Questions> getAllQuestions() {
List<Questions> quesList = new ArrayList<Questions>();
String selectQuery = "SELECT * FROM " + TABLE_QUEST;
dbase=this.getReadableDatabase();
Cursor cursor = dbase.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Questions quest = new Questions();
quest.setID(cursor.getInt(0));
quest.setQUESTION(cursor.getString(1));
quest.setANSWER(cursor.getString(2));
quest.setOPTA(cursor.getString(3));
quest.setOPTB(cursor.getString(4));
quest.setOPTC(cursor.getString(5));
quesList.add(quest);
} while (cursor.moveToNext());
}
return quesList;
}
public int updateQuestions (Questions questions){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("questions",questions.getQUESTION());
contentValues.put("answer",questions.getANSWER());
contentValues.put("opta", questions.getOPTA());
contentValues.put("optb", questions.getOPTB());
contentValues.put("optc", questions.getOPTC());
int i = db.update(TABLE_QUEST, contentValues, KEY_ID + " = ?", new String[]{String.valueOf(questions.getID())});
db.close();
return i;
}
}
and this is my quizz activity class
package com.example.toureamidou.piste;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import java.io.ByteArrayOutputStream;
import java.util.List;
public class Quiz extends AppCompatActivity {
List<Questions> quesList;
int qid=0;
Questions currentQ;
TextView txtQuestion;
RadioButton rda, rdb, rdc;
Button butNext;
DatabaseHelper myDb;
MediaPlayer wrongsound;
MediaPlayer winsound;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz);
myDb = new DatabaseHelper(this);
quesList = myDb.getAllQuestions();
currentQ=quesList.get(qid);
txtQuestion=(TextView)findViewById(R.id.textView1);
rda=(RadioButton)findViewById(R.id.radio0);
rdb=(RadioButton)findViewById(R.id.radio1);
rdc=(RadioButton)findViewById(R.id.radio2);
butNext=(Button)findViewById(R.id.button1);
wrongsound = MediaPlayer.create(this,R.raw.mywrong);
winsound = MediaPlayer.create(this,R.raw.mysound);
setQuestionsView();
Bitmap b = BitmapFactory.decodeResource(getResources(),R.drawable.quizz);
ByteArrayOutputStream boss = new ByteArrayOutputStream();
b.compress(Bitmap.CompressFormat.PNG,100,boss);
byte[] img = boss.toByteArray();
butNext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
RadioGroup grp = (RadioGroup) Quiz.this.findViewById(R.id.radioGroup1);
RadioButton answer = (RadioButton) Quiz.this.findViewById(grp.getCheckedRadioButtonId());
Log.d("your answer", Quiz.this.currentQ.getANSWER() + " " + answer.getText());
if (Quiz.this.currentQ.getANSWER().equals(answer.getText())) {
winsound.start();
} else {
wrongsound.start();
}
if (Quiz.this.qid < 5) {
Quiz.this.currentQ = (Questions) Quiz.this.quesList.get(Quiz.this.qid);
Quiz.this.setQuestionsView();
} else {
Intent intent = new Intent(Quiz.this, Result.class);
Bundle b = new Bundle();
intent.putExtras(b);
Quiz.this.startActivity(intent);
Quiz.this.finish();
}
}
});
}
private void setQuestionsView() {
txtQuestion.setText(currentQ.getQUESTION());
rda.setText(currentQ.getOPTA());
rdb.setText(currentQ.getOPTB());
rdc.setText(currentQ.getOPTC());
qid++;
}
}
腹胀与图像（或任何其他大量的数据），你的数据库是不是一个好主意。相反，您最好存储图像位置并从那里加载图像。 –
[如何在sqlite数据库中存储图像]可能的重复（http://stackoverflow.com/questions/9357668/how-to-store-image-in-sqlite-database） – myatmins