Question

我正在创建一个简单的应用程序，您可以使用一个按钮将单词添加到用户词典，然后通过单击另一个按钮来显示用户词典单词。我在将单词添加到词典时遇到一些问题。特别是第一个参数，上下文，在addWord（this）中。以下是主要活动的副本和错误的副本。任何帮助或指导表示赞赏。

错误：

错误：不兼容的类型：无法转换为上下文

MainActivity

public abstract class MainActivity extends Activity implements View.OnClickListener {
    EditText edtTxt;
    TextView txtVw;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edtTxt = findViewById(R.id.editText1);
        txtVw = findViewById(R.id.Display);

        Button button1 = (Button) findViewById(R.id.insertWord);
        button1.setOnClickListener(
                new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        UserDictionary.Words.addWord(this, edtTxt.getText().toString(), 10, UserDictionary.Words.LOCALE_TYPE_ALL);
                        Toast.makeText(getApplicationContext(), "Word Successfully Added to USER DICTIONARY", 10).show();
                    }
                });

        Button button2 = (Button) findViewById(R.id.displayWord);
        button2.setOnClickListener(
        new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Uri dic = UserDictionary.Words.CONTENT_URI;
                ContentResolver resolver = getContentResolver();
                Cursor cursor = resolver.query(dic, null, null, null, null);
                txtVw.setText("");
                while (cursor.moveToNext()) {
                    String word = cursor.getString(cursor.getColumnIndex(UserDictionary.Words.WORD));
                    txtVw.append("\nword: " + word);
                }
            }
        });
    }
}

Answer 1

尝试一下。使用onCreate()方法。

String text = edtTxt.getText().toString();

button1.setOnClickListener(
        new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                UserDictionary.Words.addWord(MainActivity.this, text, 10, UserDictionary.Words.LOCALE_TYPE_ALL);
                Toast.makeText(getApplicationContext(), "Word Successfully Added to USER DICTIONARY", 10).show();
            }
        });

在词典中添加单词，打印条目以显示

1 个答案: