Question

我有一个EditText，一个textView和一个按钮，

触摸按钮时，我需要使用EditText的值设置textView，但是我有一个变量没有得到认可[对不起这里的机器人noob]

public class XynthaCalcTestActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        //buttons
        benefixPaButtonPressed(); 
        benefixAdultButtonPressed();
        xynthaButtonPressed(); 
        calculateButtonPressed();

        //textField == EditText
        final EditText et;
        et = (EditText)findViewById(R.id.editText1);
    }

    public void calculateButtonPressed() {
        // TODO Auto-generated method stub
        Button button = (Button) findViewById(R.id.result);

        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Log.d("myTag",  "result biatch");

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

                Toast msg = Toast.makeText(getBaseContext(),text, Toast.LENGTH_LONG);
                 msg.show();

            }

        });

    }
}

所以与String text=et.getText().toString();一致我有错误et cannot be resolved

所以...... 如何声明我的编辑文本，以便按钮类可以看到它？

非常感谢！

Answer 1

make et a field，拥有最终修饰符对我来说毫无意义。

public class XynthaCalcTestActivity extends Activity {

    private EditText et;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        //buttons
        benefixPaButtonPressed(); 
        benefixAdultButtonPressed();
        xynthaButtonPressed(); 
        calculateButtonPressed();

        //textField == EditText
        et = (EditText)findViewById(R.id.editText1);
    }

    public void calculateButtonPressed() {
        // TODO Auto-generated method stub
        Button button = (Button) findViewById(R.id.result);

        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Log.d("myTag",  "result biatch");

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

                Toast msg = Toast.makeText(getBaseContext(),text, Toast.LENGTH_LONG);
                 msg.show();

            }

        });

    }
}

Answer 2

将Edittext字段“et”定义为类变量。

Answer 3

试试这段代码，它可以帮到你......

public class XynthaCalcTestActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    //buttons
   // benefixPaButtonPressed(); 
   // benefixAdultButtonPressed();
   // xynthaButtonPressed(); 
   // calculateButtonPressed();

    //textField == EditText

    final EditText editText = (EditText)findViewById(R.id.editText1);
    final TextView textView = (TextView)findViewById(R.id.textview);
    Button button = (Button)findViewById(R.id.button);

    button.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

            String text = editText.getText().toString();
            textView.setText(text);
            Toast.makeText(XynthaCalcTestActivity.this,text, Toast.LENGTH_LONG).show();
        }

    });
}
}

关于Android中EditText的基本用法

3 个答案: