Android用软键盘将整个界面推上去

 在Android UI中，我们常常会使用EditText，当用户点击这个EditText时会触发软键盘，这个软键盘会把EditText以下的界面挡住，有时候我们希望用户看到完整的界面：

原理很简单，将布局的最外层添加一个ScrollView，当用户点击EditText时，将ScrollView滚动到底，废话不说，直接上代码 
AndroidMainfest.xml 

 xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.ipjmc.demo.inputmethod"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk android:minSdkVersion="8" />

     <application
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name" >
         <activity
             android:label="@string/app_name"
             android:name=".InputMethodActivity"


             android:windowSoftInputMode="stateHidden|adjustResize" >
             <intent-filter >
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             intent-filter>
         activity>
     application>
 manifest>

 xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.ipjmc.demo.inputmethod"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk android:minSdkVersion="8" />

     <application
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name" >
         <activity
             android:label="@string/app_name"
             android:name=".InputMethodActivity"


             android:windowSoftInputMode="stateHidden|adjustResize" >
             <intent-filter >
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             intent-filter>
         activity>
     application>
 manifest>

        在布局页面中，我们在最外层使用了ScrollView，由于软键盘的弹出，原有界面从新布局，使得用户可以滚动界面。 
main.xml  

 xml version="1.0" encoding="utf-8"?>
 <ScrollView android:id="@+id/scroll" xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent" android:layout_height="match_parent"
     android:fillViewport="true" >
     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="vertical" >

         <TextView  android:text="@string/hello" android:textColor="#000"
             android:layout_width="fill_parent" android:layout_height="300dip"
             android:background="#0000FF" />

         <EditText android:id="@+id/edit"
             android:layout_width="match_parent" android:layout_height="wrap_content"/>

         <Button android:id="@+id/button" android:text="提交"
             android:layout_width="match_parent" android:layout_height="wrap_content"/>
     LinearLayout>
 ScrollView>

 xml version="1.0" encoding="utf-8"?>
 <ScrollView android:id="@+id/scroll" xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent" android:layout_height="match_parent"
     android:fillViewport="true" >
     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="vertical" >

         <TextView  android:text="@string/hello" android:textColor="#000"
             android:layout_width="fill_parent" android:layout_height="300dip"
             android:background="#0000FF" />

         <EditText android:id="@+id/edit"
             android:layout_width="match_parent" android:layout_height="wrap_content"/>

         <Button android:id="@+id/button" android:text="提交"
             android:layout_width="match_parent" android:layout_height="wrap_content"/>
     LinearLayout>
 ScrollView>

下面是代码的逻辑部分，比较简单  

 package com.ipjmc.demo.inputmethod;

 import android.app.Activity;
 import android.os.Bundle;
 import android.os.Handler;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.ScrollView;
 import android.util.Log;
 import android.view.View;
 public class InputMethodActivity extends Activity implements View.OnClickListener {

     private static final String TAG = "Scroll";
     private EditText mEdit;
     private Button mButton;
     private ScrollView mScrollView;
     private Handler mHandler = new Handler();
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);

         mScrollView = (ScrollView) findViewById(R.id.scroll);
         mEdit = (EditText) findViewById(R.id.edit);
         mButton = (Button) findViewById(R.id.button);

         mEdit.setOnClickListener(this);
     }

     @Override
     public void onClick(View v) {

         //这里必须要给一个延迟，如果不加延迟则没有效果。我现在还没想明白为什么
         mHandler.postDelayed(new Runnable() {

             @Override
             public void run() {
                 //将ScrollView滚动到底
                 mScrollView.fullScroll(View.FOCUS_DOWN);
             }
         }, 100);

     }
 }

 package com.ipjmc.demo.inputmethod;

 import android.app.Activity;
 import android.os.Bundle;
 import android.os.Handler;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.ScrollView;
 import android.util.Log;
 import android.view.View;
 public class InputMethodActivity extends Activity implements View.OnClickListener {

     private static final String TAG = "Scroll";
     private EditText mEdit;
     private Button mButton;
     private ScrollView mScrollView;
     private Handler mHandler = new Handler();
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);

         mScrollView = (ScrollView) findViewById(R.id.scroll);
         mEdit = (EditText) findViewById(R.id.edit);
         mButton = (Button) findViewById(R.id.button);

         mEdit.setOnClickListener(this);
     }

     @Override
     public void onClick(View v) {

         //这里必须要给一个延迟，如果不加延迟则没有效果。我现在还没想明白为什么
         mHandler.postDelayed(new Runnable() {

             @Override
             public void run() {
                 //将ScrollView滚动到底
                 mScrollView.fullScroll(View.FOCUS_DOWN);
             }
         }, 100);

     }
 }