我在导入的预填充 sqlite 数据库中有一个表，以及 A1、B1、A2、B2、A3、B3 行。我随机将它们的内容设置为一些按钮。现在我希望当用户单击一对按钮时，例如按钮 2 和之后的按钮 5，比较这些按钮的内容是否匹配，即我希望 A1 和 B1 成对，A2 和 B2 等等。所以我想比较他们的列是否匹配。怎么做？到目前为止，这是我的代码：
public class Game extends Activity implements View.OnClickListener{
LinkedList<Long> mAnsweredQuestions = new LinkedList<Long>();
private String generateWhereClause(){
StringBuilder result = new StringBuilder();
for (Long l : mAnsweredQuestions){
result.append(" AND _ID <> " + l);
}
return result.toString();
}
final OnClickListener clickListener = new OnClickListener() {
public void onClick(View v) {
}
};
Button a1,a2,a3,a4,b1,b2,b3,b4;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.spojnice);
a1 = (Button) findViewById(R.id.bA1);
a2 = (Button) findViewById(R.id.bA2);
a3 = (Button) findViewById(R.id.bA3);
a4 = (Button) findViewById(R.id.bA4);
b1 = (Button) findViewById(R.id.bB1);
b2 = (Button) findViewById(R.id.bB2);
b3 = (Button) findViewById(R.id.bB3);
b4 = (Button) findViewById(R.id.bB4);
nextQuestion();
}
private void nextQuestion() {
TestAdapter mDbHelper = new TestAdapter(this);
mDbHelper.createDatabase();
try{
mDbHelper.open();
Cursor c = mDbHelper.getTestData(generateWhereClause());
mAnsweredQuestions.add(c.getLong(0));
List<String> labelsA = new ArrayList<String>();
List<String> labelsB = new ArrayList<String>();
labelsA.add(c.getString(2));
labelsA.add(c.getString(4));
labelsA.add(c.getString(6));
labelsA.add(c.getString(8));
labelsB.add(c.getString(3));
labelsB.add(c.getString(5));
labelsB.add(c.getString(7));
labelsB.add(c.getString(9));
Collections.shuffle(labelsA);
Collections.shuffle(labelsB);
a1.setText(labelsA.get(0));
a1.setTag(labelsA.get(0));
a1.setOnClickListener(clickListener);
a2.setText(labelsA.get(1));
a2.setOnClickListener(clickListener);
a3.setText(labelsA.get(2));
a3.setOnClickListener(clickListener);
b1.setText(labelsB.get(0));
b1.setOnClickListener(clickListener);
b2.setText(labelsB.get(1));
b2.setOnClickListener(clickListener);
b3.setText(labelsB.get(2));
b3.setOnClickListener(clickListener);
}
finally{
mDbHelper.close();
}
}
这是我的数据库助手：
public class DataBaseHelper extends SQLiteOpenHelper
{
private static String TAG = "DataBaseHelper"; // Tag just for the LogCat window
//destination path (location) of our database on device
private static String DB_PATH = "/data/data/rs.androidaplikacije.spojnice/databases/";
private static String DB_NAME ="pitanja.sqlite";// Database name
private static SQLiteDatabase mDataBase;
private final Context mContext;
private static final String KEY_ID = "_ID";
private static final String KEY_PITANJE = "PITANJE";
private static final String TABLE_NAME = "tblPitanja";
public DataBaseHelper(Context mojContext)
{
super(mojContext, DB_NAME, null, 1);// 1? its Database Version
DB_PATH = mojContext.getApplicationInfo().dataDir + "/databases/";
this.mContext = mojContext;
}
public void createDataBase() throws IOException
{
//If database not exists copy it from the assets
this.getReadableDatabase();
this.close();
try
{
//Copy the database from assests
copyDataBase();
Log.e(TAG, "createDatabase database created");
}
catch (IOException mIOException)
{
throw new Error("ErrorCopyingDataBase");
}
}
/*Check that the database exists here: /data/data/your package/databases/Da Name
private boolean checkDataBase()
{
File dbFile = new File(DB_PATH + DB_NAME);
//Log.v("dbFile", dbFile + " "+ dbFile.exists());
return dbFile.exists();
}
*/
//Copy the database from assets
private void copyDataBase() throws IOException
{
InputStream mInput = mContext.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
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();
}
//Open the database, so we can query it
public boolean openDataBase() throws SQLException
{
String mPath = DB_PATH + DB_NAME;
//Log.v("mPath", mPath);
mDataBase = SQLiteDatabase.openDatabase(mPath, null, SQLiteDatabase.CREATE_IF_NECESSARY);
//mDataBase = SQLiteDatabase.openDatabase(mPath, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS);
return mDataBase != null;
}
@Override
public void close()
{
if(mDataBase != null)
mDataBase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase arg0) {
}
@Override
public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
Log.w("DataBaseHelper", "Upgrading database!!!!!");
onCreate(arg0);
}
}
和我的测试适配器：
public class TestAdapter
{
protected static final String TAG = "DataAdapter";
private final Context mContext;
private SQLiteDatabase mDb;
private DataBaseHelper mDbHelper;
public TestAdapter(Context context)
{
this.mContext = context;
mDbHelper = new DataBaseHelper(mContext);
}
public TestAdapter createDatabase() throws SQLException
{
try
{
mDbHelper.createDataBase();
}
catch (IOException mIOException)
{
Log.e(TAG, mIOException.toString() + " UnableToCreateDatabase");
throw new Error("UnableToCreateDatabase");
}
return this;
}
public TestAdapter open() throws SQLException
{
try
{
mDbHelper.openDataBase();
mDbHelper.close();
mDb = mDbHelper.getReadableDatabase();
}
catch (SQLException mSQLException)
{
Log.e(TAG, "open >>"+ mSQLException.toString());
throw mSQLException;
}
return this;
}
public void close()
{
mDbHelper.close();
}
public Cursor getTestData(String whereClause)
{;
try
{
String sql ="SELECT * FROM tblPitanja WHERE 1 = 1 " + whereClause + " ORDER BY RANDOM() LIMIT 1";
Cursor mCur = mDb.rawQuery(sql, null);
if (mCur!=null)
{
mCur.moveToNext();
}
return mCur;
}
catch (SQLException mSQLException)
{
Log.e(TAG, "getTestData >>"+ mSQLException.toString());
throw mSQLException;
}
}
}