基于安卓的英语单词app完整代码

很抱歉，由于代码较长，此处无法提供完整代码。但是，以下是一个简单的基于安卓的英语单词app的实现步骤和代码示例：

1. 创建一个新项目
在 Android Studio 中创建一个新项目，选择空活动作为起始模板。

2. 添加单词列表
创建一个 RecyclerView 来显示单词列表，并创建一个适配器来管理列表数据。可以使用 SQLite 数据库来存储单词列表和单词的含义。

3. 添加搜索功能
在应用中添加搜索框，以便用户可以轻松地查找单词。可以使用 TextWatcher 监听搜索框中的文本变化，并在适配器中根据用户输入更新列表。

4. 添加单词详情页
为每个单词创建一个详情页，包含单词的含义、例句和发音。可以使用 MediaPlayer 类来播放单词的发音。

5. 添加单词记忆功能
为了帮助用户记忆单词，可以添加一些记忆功能，例如添加单词到收藏夹、创建单词卡片等。

以下是示例代码：

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;
    private WordAdapter mWordAdapter;
    private EditText mSearchEditText;
    private DBHelper mDBHelper;

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

        mRecyclerView = findViewById(R.id.recycler_view);
        mSearchEditText = findViewById(R.id.search_edit_text);

        mDBHelper = new DBHelper(this);

        mWordAdapter = new WordAdapter(this, mDBHelper.getAllWords());
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mRecyclerView.setAdapter(mWordAdapter);

        mSearchEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                mWordAdapter.filter(s.toString());
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
    }

    @Override
    protected void onDestroy() {
        mDBHelper.close();
        super.onDestroy();
    }
}

WordAdapter.java

public class WordAdapter extends RecyclerView.Adapter<WordAdapter.ViewHolder> {

    private Context mContext;
    private List<Word> mWordList;
    private List<Word> mFilteredWordList;

    public WordAdapter(Context context, List<Word> wordList) {
        mContext = context;
        mWordList = wordList;
        mFilteredWordList = new ArrayList<>(wordList);
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.item_word, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Word word = mFilteredWordList.get(position);
        holder.mWordTextView.setText(word.getWord());
        holder.mMeaningTextView.setText(word.getMeaning());

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(mContext, WordDetailActivity.class);
                intent.putExtra("word", word);
                mContext.startActivity(intent);
            }
        });
    }

    @Override
    public int getItemCount() {
        return mFilteredWordList.size();
    }

    static class ViewHolder extends RecyclerView.ViewHolder {

        TextView mWordTextView;
        TextView mMeaningTextView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            mWordTextView = itemView.findViewById(R.id.word_text_view);
            mMeaningTextView = itemView.findViewById(R.id.meaning_text_view);
        }
    }

    public void filter(String query) {
        mFilteredWordList.clear();
        if (TextUtils.isEmpty(query)) {
            mFilteredWordList.addAll(mWordList);
        } else {
            for (Word word : mWordList) {
                if (word.getWord().toLowerCase().contains(query.toLowerCase())) {
                    mFilteredWordList.add(word);
                }
            }
        }
        notifyDataSetChanged();
    }
}

DBHelper.java

public class DBHelper extends SQLiteOpenHelper {

    private static final String DATABASE_NAME = "words.db";
    private static final int DATABASE_VERSION = 1;

    private static final String TABLE_NAME = "words";
    private static final String COLUMN_ID = "_id";
    private static final String COLUMN_WORD = "word";
    private static final String COLUMN_MEANING = "meaning";

    private static final String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + " (" +
            COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
            COLUMN_WORD + " TEXT, " +
            COLUMN_MEANING + " TEXT)";

    public DBHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CREATE_TABLE);
        insertInitialData(db);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        onCreate(db);
    }

    public List<Word> getAllWords() {
        List<Word> wordList = new ArrayList<>();
        SQLiteDatabase db = getReadableDatabase();
        Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_NAME, null);
        if (cursor.moveToFirst()) {
            do {
                int id = cursor.getInt(cursor.getColumnIndex(COLUMN_ID));
                String word = cursor.getString(cursor.getColumnIndex(COLUMN_WORD));
                String meaning = cursor.getString(cursor.getColumnIndex(COLUMN_MEANING));
                wordList.add(new Word(id, word, meaning));
            } while (cursor.moveToNext());
        }
        cursor.close();
        return wordList;
    }

    private void insertInitialData(SQLiteDatabase db) {
        ContentValues values = new ContentValues();
        values.put(COLUMN_WORD, "apple");
        values.put(COLUMN_MEANING, "a round fruit with red or green skin and a white inside");
        db.insert(TABLE_NAME, null, values);

        values.put(COLUMN_WORD, "banana");
        values.put(COLUMN_MEANING, "a long curved fruit with a yellow skin and soft sweet flesh");
        db.insert(TABLE_NAME, null, values);

        values.put(COLUMN_WORD, "cake");
        values.put(COLUMN_MEANING, "a sweet baked food made from flour, sugar, and other ingredients");
        db.insert(TABLE_NAME, null, values);
    }
}

Word.java

public class Word implements Serializable {

    private int mId;
    private String mWord;
    private String mMeaning;

    public Word(int id, String word, String meaning) {
        mId = id;
        mWord = word;
        mMeaning = meaning;
    }

    public int getId() {
        return mId;
    }

    public void setId(int id) {
        mId = id;
    }

    public String getWord() {
        return mWord;
    }

    public void setWord(String word) {
        mWord = word;
    }

    public String getMeaning() {
        return mMeaning;
    }

    public void setMeaning(String meaning) {
        mMeaning = meaning;
    }
}

WordDetailActivity.java

public class WordDetailActivity extends AppCompatActivity {

    private Word mWord;
    private TextView mWordTextView;
    private TextView mMeaningTextView;
    private Button mPronunciationButton;

    private MediaPlayer mMediaPlayer;

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

        mWord = (Word) getIntent().getSerializableExtra("word");

        mWordTextView = findViewById(R.id.word_text_view);
        mMeaningTextView = findViewById(R.id.meaning_text_view);
        mPronunciationButton = findViewById(R.id.pronunciation_button);

        mWordTextView.setText(mWord.getWord());
        mMeaningTextView.setText(mWord.getMeaning());

        mPronunciationButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mMediaPlayer == null) {
                    mMediaPlayer = MediaPlayer.create(WordDetailActivity.this, R.raw.pronunciation);
                }
                mMediaPlayer.start();
            }
        });
    }

    @Override
    protected void onDestroy() {
        if (mMediaPlayer != null) {
            mMediaPlayer.release();
            mMediaPlayer = null;
        }
        super.onDestroy();
    }
}