android键盘事件

在main.xml文件中代码如下：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="horizontal" >

<TextView

android:id="@+id/textview"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="请输入EMAIL"/>

<EditText

android:id="@+id/input"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:selectAllOnFocus="true"/>

<ImageView

android:id="@+id/img"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/wrong"/>

</LinearLayout>

在MyKeyDemo.java中代码如下：

package com.tarena.key;

import android.R.string;

import android.app.Activity;

import android.os.Bundle;

import android.view.KeyEvent;

import android.view.View;

import android.view.View.OnKeyListener;

import android.widget.EditText;

import android.widget.ImageView;

public class MyKeyDemo extends Activity {

private EditText input = null;

private ImageView img = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

super.setContentView(R.layout.main);

this.input = (EditText) super.findViewById(R.id.input);  //取得组件

this.img = (ImageView) super.findViewById(R.id.img);  //取得组件

this.input.setOnKeyListener(new OnKeyListenerImpl());

}

private class OnKeyListenerImpl implements OnKeyListener{

public boolean onKey(View v, int keyCode, KeyEvent event) {

switch (event.getAction()) {

case KeyEvent.ACTION_UP:

String msg = MyKeyDemo.this.input.getText().toString();  // 取得输入的文字信息

if(msg.matches("\\w+@\\w+\\.\\w+")){ //验证通过

MyKeyDemo.this.img.setImageResource(R.drawable.right);  //设置正确的图片

}

else{

MyKeyDemo.this.img.setImageResource(R.drawable.wrong);  //设置错误的图片

}

case KeyEvent.ACTION_DOWN:  //键盘按下

break;

}

return false;

}

}

}