Android-EditText文本输入框Demo

package com.lxt008;

import com.lxt008.R;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class Activity01 extends Activity
{
    private TextView    m_TextView;
    private EditText    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.TextView01);
        m_EditText = (EditText) findViewById(R.id.EditText01);

        m_TextView.setTextSize(20);
        /**
         * 设置当m_EditText中为空时提示的内容 
         * 在XML中同样可以实现：android:hint="请输入账号"
         */
        m_EditText.setHint("请输入账号");
        
        /* 设置EditText事件监听 */
        m_EditText.setOnKeyListener(new EditText.OnKeyListener() {
            public boolean onKey(View arg0, int arg1, KeyEvent arg2)
            {
                // TODO Auto-generated method stub
                // 得到文字，将其显示到TextView中
                m_TextView.setText("文本框中内容是：" + m_EditText.getText().toString());
                return false;
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TextView  
    android:id="@+id/TextView01"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
  <EditText
  android:id="@+id/EditText01"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:textSize="18sp"    
  android:layout_x="29px"
  android:layout_y="33px"
  />
</LinearLayout>