做安卓键盘功能的时候，要是需求不单单是输入文字，比如要输入表情，图片等的时候，就需要监听键盘的弹起和隐藏。在实际的项目中也遇到了这样的需求。接下来就写个博客，记录一些方法。
实现原理就是监听自定义控件的高度变换得键盘的弹起和隐藏状态。
都是程序员都心急。直接上代码：
MainActivity：
package com.example.testsoftinput;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;
import com.example.testsoftinput.ListenerInputView.OnKeyBoardStateChangeListener;
public class MainActivity extends Activity {
private ListenerInputView mListenerInputView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListenerInputView=(ListenerInputView) findViewById(R.id.mListenerInputView);
mListenerInputView.setOnKeyBoardStateChangeListener(new OnKeyBoardStateChangeListener() {
@Override
public void OnKeyBoardState(int state) {
// TODO Auto-generated method stub
switch (state) {
//开启
case 1:
Toast.makeText(getApplicationContext(), "输入法显示了.", 1).show();
break;
//关闭
case 0:
Toast.makeText(getApplicationContext(), "变化为正常状态(输入法关闭).", 1).show();
break;
default:
break;
}
}
});
}
}
activity_main.xml：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${packageName}.${activityClass}" >
<com.example.testsoftinput.ListenerInputView
android:id="@+id/mListenerInputView"
android:layout_width="2dip"
android:layout_height="match_parent" >
</com.example.testsoftinput.ListenerInputView>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#22ff0000"
android:gravity="center"
android:text="Android技术交流群 :110520459" />
<EditText
android:layout_width="match_parent"
android:layout_height="50dip"
android:hint="监听软键盘的弹起和隐藏" />
</RelativeLayout>
ListenerInputView：
package com.example.testsoftinput;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
public class ListenerInputView extends View {
private static final boolean DEBUG = true;
private static final String TAG = "softinput";
private Context mContext;
private int softKeyboardHeight = 0;
public ListenerInputView(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
init(context);
}
public ListenerInputView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public ListenerInputView(Context context) {
super(context);
init(context);
}
private void init(Context context) {
this.mContext = context;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (DEBUG) {
Log.i(TAG, "screenHeight=" + 0 + ";w=" + w + ";h=" + h + ";oldw="
+ oldw + ";oldh=" + oldh);
}
if (Math.abs(h - oldh) > softKeyboardHeight) {
if (h >= oldh) {
if (DEBUG) {
if (listener != null) {
listener.OnKeyBoardState(0);
}
Log.i(TAG, "变化为正常状态(输入法关闭).");
}
} else {
if (DEBUG) {
if (listener != null) {
listener.OnKeyBoardState(1);
}
Log.i(TAG, "输入法显示了.");
}
}
} else {
if (oldh != 0) {
if (DEBUG) {
Log.i(TAG, "变化为正常状态.(全屏关闭)");
if (listener != null) {
listener.OnKeyBoardState(0);
}
}
} else {
if (DEBUG) {
Log.i(TAG, "初始化，当前为正常状态.");
}
}
}
}
/**
* 监听键盘变化 state 1 开启软键盘 0关闭软键盘
*
* @author haoweilai
*
*/
public interface OnKeyBoardStateChangeListener {
void OnKeyBoardState(int state);
}
private OnKeyBoardStateChangeListener listener;
public void setOnKeyBoardStateChangeListener(
OnKeyBoardStateChangeListener listener) {
this.listener = listener;
}
}
看到这里的朋友明白了，其实很简单。战友们我们一起加油！
原创链接：http://blog.csdn.net/u010052279/article/details/50151177
最后附上demo下载地址：http://download.csdn.net/detail/u010052279/9320537