Question

我的问题是当我从列表中手动选择它时，它会正确显示定义。但是，当我键入它并搜索定义时，它总是显示我的列表的第一项。我目前通过浏览教程学习android并遇到了这个例子，但无法解决这个问题。这是我的代码：

public class DbBackend extends DbObject{

    public DbBackend(Context context) {
        super(context);
    }

    public String[] dictionaryWords(){
        String query = "Select * from dictionary";
        Cursor cursor = this.getDbConnection().rawQuery(query, null);
        ArrayList<String> wordTerms = new ArrayList<String>();
        if(cursor.moveToFirst()){
            do{
                String word = cursor.getString(cursor.getColumnIndexOrThrow("word"));
                wordTerms.add(word);
            }while(cursor.moveToNext());
        }
        cursor.close();
        String[] dictionaryWords = new String[wordTerms.size()];
        dictionaryWords = wordTerms.toArray(dictionaryWords);
        return dictionaryWords;
    }

//
//    public int getIndexByValue(String value){
//        S
//    }
    public QuizObject getQuizById(int quizId){

        QuizObject quizObject = null;
        String query = "select * from dictionary where _id = " + quizId;
        Cursor cursor = this.getDbConnection().rawQuery(query, null);
        if(cursor.moveToFirst()){
            do{
                String word = cursor.getString(cursor.getColumnIndexOrThrow("word"));
                String meaning = cursor.getString(cursor.getColumnIndexOrThrow("meaning"));
                quizObject = new QuizObject(word, meaning);
            }while(cursor.moveToNext());
        }
        cursor.close();
        return quizObject;
    }
}

这是字典活动

public class DictionaryActivity extends ActionBarActivity {

    private TextView wordMeaning;
    private TextToSpeech convertToSpeech;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_dictionary);

        Intent intent = getIntent();
        Bundle bundle = intent.getExtras();
        int dictionaryId = bundle.getInt("DICTIONARY_ID");
        int id = dictionaryId + 1;

        TextView word = (TextView)findViewById(R.id.word);
        wordMeaning = (TextView)findViewById(R.id.dictionary);
        Button textToSpeech = (Button)findViewById(R.id.button);

        DbBackend dbBackend = new DbBackend(DictionaryActivity.this);
        QuizObject allQuizQuestions = dbBackend.getQuizById(id);

        word.setText(allQuizQuestions.getWord());
        wordMeaning.setText(allQuizQuestions.getDefinition());



    }

另一个班级

public class MainActivity extends ActionBarActivity {

    private EditText filterText;
    private ArrayAdapter<String> listAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        filterText = (EditText)findViewById(R.id.editText);
        ListView itemList = (ListView)findViewById(R.id.listView);

        DbBackend dbBackend = new DbBackend(MainActivity.this);
        String[] terms = dbBackend.dictionaryWords();

        listAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, terms);

        itemList.setAdapter(listAdapter);
        itemList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                // make Toast when click
                Toast.makeText(getApplicationContext(), "Position " + position, Toast.LENGTH_LONG).show();

                Intent intent = new Intent(MainActivity.this, DictionaryActivity.class);
                intent.putExtra("DICTIONARY_ID", id);
                startActivity(intent);
            }
        });

Answer 1

在这部分尝试获取不是id的单词

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                // make Toast when click
                Toast.makeText(getApplicationContext(), "Position " + position, Toast.LENGTH_LONG).show();
                String selectedText = (String) parent.getItemAtPosition(position);
                Intent intent = new Intent(MainActivity.this, DictionaryActivity.class);
                intent.putExtra("DICTIONARY_ID", selectedText);
                startActivity(intent);
            }

和查询

String query = "select * from dictionary where _id = " + quizId;

替换为

String query = "select * from dictionary where word = '" + quizId + "';

记住quizId现在是你名单中的单词，

Android：使用数组适配器在列表中搜索

1 个答案: