EditText的使用

package com.zz;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.EditText;
import android.widget.TextView;

public class Test1 extends Activity {
    private TextView m_TextView;
    private m_EditText;
   
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        m_TextView = (TextView) findViewById(R.id.content);
        m_EditText = (EditText) findViewById(R.id.input);
        m_EditText.addTextChangedListener(new TextWatcher() {
           
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                m_TextView.setText(m_EditText.getText().toString());
               
            }
           
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
                // TODO Auto-generated method stub
               
            }
           
            @Override
            public void afterTextChanged(Editable s) {
                // TODO Auto-generated method stub
               
            }
        });
       
    }
}