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我们在开发Android应用中，登录和注册界面是少不了的，往往在做登录注册的时候如果给界面加一个LOGO,就 有可能把用户名和密码框放在手机屏幕的中间或底部，这样当软键盘弹出的时候，就有可能挡住输入框(往往用户输完用户名和密码还要按返回键盘才能登录)，这 样用户体验是不好的，我曾今也为这种事情很头疼。首先说一下我原来想到过的解决办法：
package com.jun.qqzomelogin; import android.app.Activity; import android.content.Context; import android.util.AttributeSet; import android.view.Display; import android.widget.RelativeLayout; /** * * @author junjun * 自定义布局解决键盘弹出挡住输入框的问题 */ public class InputMethodRelativeLayout extends RelativeLayout { private int width; protected OnSizeChangedListenner onSizeChangedListenner; private boolean sizeChanged = false; //变化的标志 private int height; private int screenWidth; //屏幕宽度 private int screenHeight; //屏幕高度 public InputMethodRelativeLayout(Context paramContext, AttributeSet paramAttributeSet) { super(paramContext, paramAttributeSet); Display localDisplay = ((Activity) paramContext).getWindowManager() .getDefaultDisplay(); this.screenWidth = localDisplay.getWidth() ; this.screenHeight = localDisplay.getHeight(); } public InputMethodRelativeLayout(Context paramContext, AttributeSet paramAttributeSet, int paramInt) { super(paramContext, paramAttributeSet, paramInt); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { this.width = widthMeasureSpec; this.height = heightMeasureSpec; super.onMeasure(widthMeasureSpec, heightMeasureSpec); } @Override public void onSizeChanged(int w, int h, int oldw, int oldh) { //监听不为空、宽度不变、当前高度与历史高度不为0 if ((this.onSizeChangedListenner!= null) && (w == oldw) && (oldw != 0) && (oldh != 0)) { if ((h >= oldh) || (Math.abs(h - oldh) <= 1 * this.screenHeight / 4)) { if ((h <= oldh) || (Math.abs(h - oldh) <= 1 * this.screenHeight / 4)) return; this.sizeChanged = false; } else { this.sizeChanged = true; } this.onSizeChangedListenner.onSizeChange(this.sizeChanged ,oldh, h); measure(this.width - w + getWidth(), this.height - h + getHeight()); } } /** * 设置监听事件 * @param paramonSizeChangedListenner */ public void setOnSizeChangedListenner( InputMethodRelativeLayout.OnSizeChangedListenner paramonSizeChangedListenner) { this.onSizeChangedListenner = paramonSizeChangedListenner; } /** * 大小改变的内部接口 * @author junjun * */ public abstract interface OnSizeChangedListenner { public abstract void onSizeChange(boolean paramBoolean, int w,int h); } }
然后把以上布局引入到自己的xml布局中。如QQ空间的登录布局activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <com.jun.qqzomelogin.InputMethodRelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@id/loginpage" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/qz_bitmap_login" > <LinearLayout android:id="@id/login_container" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:orientation="vertical" android:paddingLeft="15.0dip" android:paddingRight="15.0dip" > <!-- 大logo --> <LinearLayout android:id="@id/login_logo_layout_v" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="34.0dip" android:layout_marginTop="43.0dip" android:orientation="vertical" > <ImageView android:id="@id/login_logoimg" android:layout_width="125.0dip" android:layout_height="125.0dip" android:adjustViewBounds="true" android:gravity="center" android:src="@drawable/logo_login" /> <ImageView android:layout_width="125.0dip" android:layout_height="35.0dip" android:layout_marginTop="10.0dip" android:adjustViewBounds="true" android:gravity="center" android:src="@drawable/qz_icon_logo_word_login" /> </LinearLayout> <!-- 小LOGO --> <LinearLayout android:id="@id/login_logo_layout_h" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="11.0dip" android:layout_marginTop="16.0dip" android:gravity="left|center" android:orientation="horizontal" android:visibility="gone" > <ImageView android:layout_width="42.0dip" android:layout_height="42.0dip" android:adjustViewBounds="true" android:gravity="center" android:src="@drawable/logo_login" /> <ImageView android:layout_width="93.0dip" android:layout_height="30.0dip" android:layout_marginLeft="5.0dip" android:adjustViewBounds="true" android:src="@drawable/qz_icon_logo_word_login" /> </LinearLayout> <FrameLayout android:layout_width="fill_parent" android:layout_height="45.0dip" > <EditText android:id="@id/qqId" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/qz_bg_container_cell_top_normal" android:hint="QQ号/手机号/邮箱" android:inputType="textEmailAddress" android:maxLength="50" android:paddingLeft="15.0dip" android:paddingRight="80.0dip" android:singleLine="true" android:text="" android:textColor="#ff000000" android:textColorHint="#ffbbbbbb" android:textSize="16.0dip" /> <ImageView android:id="@id/uin_close" android:layout_width="30.0dip" android:layout_height="45.0dip" android:layout_gravity="right|center" android:layout_marginRight="40.0dip" android:background="@android:color/transparent" android:clickable="true" android:scaleType="center" android:src="@drawable/qz_icon_close" android:visibility="invisible" /> <ImageView android:id="@id/selectId" android:layout_width="40.0dip" android:layout_height="45.0dip" android:layout_gravity="right|center" android:background="@android:color/transparent" android:clickable="true" android:paddingLeft="5.0dip" android:paddingRight="15.0dip" android:scaleType="center" android:src="@drawable/qz_icon_navbar_drop_down" /> </FrameLayout> <FrameLayout android:layout_width="fill_parent" android:layout_height="45.0dip" > <EditText android:id="@id/passWord" android:layout_width="fill_parent" android:layout_height="45.0dip" android:background="@drawable/qz_bg_container_cell_bottom_normal" android:hint="密码" android:inputType="textPassword" android:maxLength="16" android:paddingLeft="15.0dip" android:paddingRight="15.0dip" android:singleLine="true" android:textColor="#ff000000" android:textColorHint="#ffbbbbbb" android:textSize="16.0dip" /> <ImageView android:id="@id/psw_close" android:layout_width="30.0dip" android:layout_height="45.0dip" android:layout_gravity="right|center" android:layout_marginRight="15.0dip" android:background="@android:color/transparent" android:clickable="true" android:scaleType="center" android:src="@drawable/qz_icon_close" android:visibility="invisible" /> </FrameLayout> <Button android:id="@id/login_btn" android:layout_width="fill_parent" android:layout_height="45.0dip" android:layout_marginTop="12.0dip" android:background="@drawable/qz_selector_login" android:text="登 录" android:textColor="#ffffffff" android:textSize="20.0dip" /> </LinearLayout> <ImageButton android:id="@id/lineimg" android:layout_width="fill_parent" android:layout_height="1.0px" android:layout_above="@id/reg_and_forget_password_layout" android:background="#ffcfcfcf" /> <LinearLayout android:id="@id/reg_and_forget_password_layout" android:layout_width="fill_parent" android:layout_height="49.0dip" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:orientation="horizontal" > <Button android:id="@id/forget_password_tv" android:layout_width="0.0dip" android:layout_height="fill_parent" android:layout_weight="1.0" android:autoLink="all" android:background="@drawable/qz_selector_gray" android:gravity="center" android:text="找回密码" android:textColor="#ff666666" android:textSize="14.0dip" /> <ImageButton android:layout_width="1.0px" android:layout_height="fill_parent" android:background="#ffcfcfcf" /> <Button android:id="@id/reg_tv" android:layout_width="0.0dip" android:layout_height="fill_parent" android:layout_weight="1.0" android:autoLink="all" android:background="@drawable/qz_selector_gray" android:gravity="center" android:text="新注册" android:textColor="#ff666666" android:textSize="14.0dip" /> </LinearLayout> </com.jun.qqzomelogin.InputMethodRelativeLayout>
（2）、在Activity中实现OnSizeChangedListener，原理是设置该布局的paddingTop属性来控制子View的偏移
package com.jun.qqzomelogin; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.LinearLayout; import com.jun.qqzomelogin.InputMethodRelativeLayout.OnSizeChangedListenner; /** * * @author junjun * */ public class MainActivity extends Activity implements OnSizeChangedListenner{ private InputMethodRelativeLayout layout; private LinearLayout boot ; private LinearLayout login_logo_layout_h ; private LinearLayout login_logo_layout_v ; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //取得InputMethodRelativeLayout组件 layout = (InputMethodRelativeLayout) this.findViewById(R.id.loginpage) ; //设置监听事件 layout.setOnSizeChangedListenner(this) ; //取得大LOGO布局 login_logo_layout_v = (LinearLayout) this.findViewById(R.id.login_logo_layout_v) ; //取得小LOGO布局 login_logo_layout_h = (LinearLayout) this.findViewById(R.id.login_logo_layout_h) ; //取得找回密码和新注册布局 boot = (LinearLayout) this.findViewById(R.id.reg_and_forget_password_layout) ; } /** * 在Activity中实现OnSizeChangedListener，原理是设置该布局的paddingTop属性来控制子View的偏移 */ @Override public void onSizeChange(boolean flag,int w ,int h) { if(flag){//键盘弹出时 layout.setPadding(0, -10, 0, 0); boot.setVisibility(View.GONE) ; login_logo_layout_v.setVisibility(View.GONE) ; login_logo_layout_h.setVisibility(View.VISIBLE) ; }else{ //键盘隐藏时 layout.setPadding(0, 0, 0, 0); boot.setVisibility(View.VISIBLE) ; login_logo_layout_v.setVisibility(View.VISIBLE) ; login_logo_layout_h.setVisibility(View.GONE) ; } } }
在AndroidManifest.xml中注册该Activity，需要注意的是：必须为该Activity设置 android:windowSoftInputMode="adjustResize"属性，当windowSoftInputMode为 adjustResiz时，Layout才会调用protected void onSizeChanged(int w, int h, int oldw, int oldh)这个方法，而且不能是全屏。好了就到这里，希望对你有帮助。
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原文地址：http://www.cnblogs.com/feng-de-wei-xiao/p/4415341.html
