先上截图，有图有真相：

自定义RelativeLayout

package com.demo.softkeyboard;

import android.content.Context;

import android.util.AttributeSet;

import android.widget.RelativeLayout;

public class KeyboardListenRelativeLayout extends RelativeLayout {

private static final String TAG = KeyboardListenRelativeLayout.class.getSimpleName();

public static final byte KEYBOARD_STATE_SHOW = -3;

public static final byte KEYBOARD_STATE_HIDE = -2;

public static final byte KEYBOARD_STATE_INIT = -1;

private boolean mHasInit = false;

private boolean mHasKeyboard = false;

private int mHeight;

private IOnKeyboardStateChangedListener onKeyboardStateChangedListener;

public KeyboardListenRelativeLayout(Context context) {

super(context);

}

public KeyboardListenRelativeLayout(Context context, AttributeSet attrs) {

super(context, attrs);

}

public KeyboardListenRelativeLayout(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

public void setOnKeyboardStateChangedListener(IOnKeyboardStateChangedListener onKeyboardStateChangedListener) {

this.onKeyboardStateChangedListener = onKeyboardStateChangedListener;

}

@Override

protected void onLayout(boolean changed, int l, int t, int r, int b) {

super.onLayout(changed, l, t, r, b);

if(!mHasInit) {

mHasInit = true;

mHeight = b;

if(onKeyboardStateChangedListener != null) {

onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_INIT);

}

} else {

mHeight = mHeight < b ? b : mHeight;

}

if(mHasInit && mHeight > b) {

mHasKeyboard = true;

if(onKeyboardStateChangedListener != null) {

onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_SHOW);

}

}

if(mHasInit && mHasKeyboard && mHeight == b) {

mHasKeyboard = false;

if(onKeyboardStateChangedListener != null) {

onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_HIDE);

}

}

}

public interface IOnKeyboardStateChangedListener {

public void onKeyboardStateChanged(int state);

}

}

用法：

package com.demo.softkeyboard;

import com.demo.softkeyboard.KeyboardListenRelativeLayout.IOnKeyboardStateChangedListener;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

/**

* 软键盘监听Demo

* @author qiaoning

*

*/

public class SoftKeyboardListenDemoActivity extends Activity {

private EditText editText;

KeyboardListenRelativeLayout relativeLayout;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

relativeLayout = (KeyboardListenRelativeLayout) findViewById(R.id.keyboardRelativeLayout);

editText = (EditText) findViewById(R.id.editText);

relativeLayout.setOnKeyboardStateChangedListener(new IOnKeyboardStateChangedListener() {

public void onKeyboardStateChanged(int state) {

switch (state) {

case KeyboardListenRelativeLayout.KEYBOARD_STATE_HIDE://软键盘隐藏

editText.setVisibility(View.VISIBLE);

break;

case KeyboardListenRelativeLayout.KEYBOARD_STATE_SHOW://软键盘显示

editText.setVisibility(View.GONE);

break;

default:

break;

}

}

});

}

}

使用到的布局文件：使用到的布局文件：

android:id="@+id/keyboardRelativeLayout"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

android:layout_height="fill_parent"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:fillViewport="true">

android:layout_height="wrap_content"

android:orientation="vertical">

android:layout_width="fill_parent"

android:layout_height="wrap_content"/>

源码下载：http://files.it165.net/pro/201206/0629SoftKeyboardListenDemo.tar.gz