检测软键盘的弹起与隐藏【绝对经典,好用】
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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);
- }
- }
复制代码 这个是自定义的布局,自定义布局可以继承各种常见布局。自定义布局有键盘状态改变监听器,可以通过注册监听器来监听软键盘状态。- <?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>
复制代码 这个是优化页面的布局,从上面可以看出自定义布局的用法。- 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();
- }
- }
复制代码 这个是优化页面的代码逻辑,通过注册监听器,来监听软键盘事件。在软键盘弹起时隐藏Textview,在软键盘隐藏时显示Textview。 0 0