转自:http://www.eoeandroid.com/thread-157446-1-1.html
今天看到社区里面有人问关于如何检测软键盘的弹起和隐藏事件。正确处理好软键盘的弹起和隐藏可以大大提升应用的体验。这一点,“切客优惠”做的很好。
在软键盘弹起后,下面的分享内容自动隐藏,并且在titlebar上,显示签到按钮。这个是一个非常贴心的设计,用户体检大大提升。
这是被大家视为无解的难题,我给大家提供一种方法。
有图为证:
初始化页面
刀客优化版初始页
优化版键盘弹起
软键盘隐藏
嘿嘿,未优化版的钉子户
钉子户果然坚挺啊
下面谈谈偶的实现原理:
使用自定义布局,页面布局中包含ScrollVIew,在软键盘弹起后,布局的高度会发生改变,根据布局的高度来判断软键盘的状态。
package com.ransj.keyboard; import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.widget.RelativeLayout; public class KeyboardLayout extends RelativeLayout { private static final String TAG = KeyboardLayout.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; private boolean mHasKeybord; private int mHeight; private onKybdsChangeListener mListener; public KeyboardLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public KeyboardLayout(Context context, AttributeSet attrs) { super(context, attrs); } public KeyboardLayout(Context context) { super(context); } /** * set keyboard state listener */ public void setOnkbdStateListener(onKybdsChangeListener listener){ mListener = listener; } @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 (mListener != null) { mListener.onKeyBoardStateChange(KEYBOARD_STATE_INIT); } } else { mHeight = mHeight < b ? b : mHeight; } if (mHasInit && mHeight > b) { mHasKeybord = true; if (mListener != null) { mListener.onKeyBoardStateChange(KEYBOARD_STATE_SHOW); } Log.w(TAG, "show keyboard......."); } if (mHasInit && mHasKeybord && mHeight == b) { mHasKeybord = false; if (mListener != null) { mListener.onKeyBoardStateChange(KEYBOARD_STATE_HIDE); } Log.w(TAG, "hide keyboard......."); } } public interface onKybdsChangeListener{ public void onKeyBoardStateChange(int state); } }
<?xml version="1.0" encoding="utf-8"?> <com.ransj.keyboard.KeyboardLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/keyboardLayout1" android:layout_width="fill_parent" android:layout_height="fill_parent" > <ScrollView android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:fillViewport="true" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:id="@+id/testone_tv" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#000000" android:gravity="center" android:text="软件盘弹起,我将消失!软键盘隐藏,我将回来!" android:layout_weight="1.0" android:textColor="#00ff00" android:textStyle="bold" /> <EditText android:id="@+id/testone_et" android:layout_width="fill_parent" android:layout_height="wrap_content"></EditText> </LinearLayout> </ScrollView> </com.ransj.keyboard.KeyboardLayout>
package com.ransj.keyboard; import com.ransj.keyboard.KeyboardLayout.onKybdsChangeListener; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.TextView; import android.widget.Toast; /** * * */ public class TestOne extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.testone); KeyboardLayout mainView = (KeyboardLayout) findViewById(R.id.keyboardLayout1); final TextView tv = (TextView) findViewById(R.id.testone_tv); mainView.setOnkbdStateListener(new onKybdsChangeListener() { public void onKeyBoardStateChange(int state) { switch (state) { case KeyboardLayout.KEYBOARD_STATE_HIDE: tv.setVisibility(View.VISIBLE); Toast.makeText(getApplicationContext(), "软键盘隐藏", Toast.LENGTH_SHORT).show(); break; case KeyboardLayout.KEYBOARD_STATE_SHOW: tv.setVisibility(View.INVISIBLE); Toast.makeText(getApplicationContext(), "软键盘弹起", Toast.LENGTH_SHORT).show(); break; } } }); } @Override protected void onDestroy() { super.onDestroy(); } @Override protected void onPause() { super.onPause(); } }