获取输入法的高度/让输入框正好在输入法之上

此功能类似于QQ或者微信的输入框，当输入框获取焦点时，输入法弹出，输入框自动上移并且正好保持在输入法的上面
最终效果图如下

整体思路就是重写一个布局文件，然后再布局布局发生变化时（即输入法弹起）onmeasure（）方法中获取现在的布局尺寸，得到输入法的高度

思路不难，下面看看代码 注意一些细节
主activity布局文件

<com.example.getinputheight.KeyboardDetectorRelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:custom="http://schemas.android.com/apk/res/com.example.getinputheight"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:id="@+id/root_layout"    tools:context=".MainActivity" >    <Button        android:id="@+id/btn_h"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:text="弹出对话框" /></com.example.getinputheight.KeyboardDetectorRelativeLayout>

输入框布局用了Popupwindows,界面很简单代码如下

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="40dp"    android:background="@android:color/holo_blue_light"    android:orientation="horizontal" >    <RelativeLayout        android:id="@+id/select_layout"        android:layout_width="match_parent"        android:layout_height="wrap_content" >        <EditText            android:id="@+id/input_et"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_marginBottom="5dp"            android:layout_marginRight="60dp"            android:layout_marginTop="5dp"            android:background="@android:color/white"            android:focusable="true"            android:layout_marginLeft="5dp"            android:focusableInTouchMode="true"            android:lines="2" >            <requestFocus />        </EditText>        <Button            android:id="@+id/send_btn"            android:layout_width="60dp"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:layout_alignTop="@+id/input_et"            android:text="发送" />    </RelativeLayout></RelativeLayout>

清单配置文件也贴一下 主要是输入面板的弹出模式要注意一下，另外，application不要忘记注册

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.getinputheight" android:versionCode="1" android:versionName="1.0">    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="17" />    <application android:name="com.example.getinputheight.MyApplication" android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name" android:theme="@style/AppTheme">        <activity android:name="com.example.getinputheight.MainActivity" />        //注意这里        android:windowSoftInputMode="adjustResize|stateHidden"        android:label="@string/app_name" >        <intent-filter>            <action android:name="android.intent.action.MAIN" />            <category android:name="android.intent.category.LAUNCHER" />        </intent-filter>    </activity></application>    </manifest>

自定义布局文件代码

package com.example.getinputheight;import android.app.Activity;import android.content.Context;import android.content.SharedPreferences;import android.util.AttributeSet;import android.util.Log;import android.widget.RelativeLayout;public class KeyboardDetectorRelativeLayout extends RelativeLayout {    private OnSoftKeyboardListener listener;    public KeyboardDetectorRelativeLayout(Context context) {        this(context, null);        // TODO Auto-generated constructor stub    }    public KeyboardDetectorRelativeLayout(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public KeyboardDetectorRelativeLayout(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }    //获取输入法的高度主要在此方法中执行,当界面布局发生变化时，会执行此方法，从而获取到输入法的高度    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        // TODO Auto-generated method stub        final int proposedHeight = MeasureSpec.getSize(heightMeasureSpec);        final int actualHeight = getHeight();        int diff = actualHeight - proposedHeight;        Log.i("TAG", "proposedHeight=" + proposedHeight);        Log.i("TAG", "actualHeight=" + actualHeight);        Log.i("TAG", "diff=" + diff);        if (diff > 100) {            Log.i("TAG", MyApplication.context.toString());            SharedPreferences sh = MyApplication.context.getSharedPreferences("in_put", Context.MODE_PRIVATE);            SharedPreferences.Editor editor = sh.edit();            editor.putInt("size", diff);            Log.i("TAG", "size=" + diff);            editor.commit();            if (null != listener) {                listener.onShown(diff);            }        } else if (diff < -100) {            if (null != listener) {                listener.onHidden();            }        }        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        if (null != listener) {            listener.onMeasureFinished();        }    }    public void setOnSoftKeyboardListener(OnSoftKeyboardListener listener) {        this.listener = listener;    }    //输入法面板弹出。隐藏以及布局测量完毕执行的方法    interface OnSoftKeyboardListener {        void onShown(int keyboardHeight);        void onHidden();        void onMeasureFinished();    }}

Application：

package com.example.getinputheight;import android.app.Application;import android.content.Context;import android.util.Log;public class MyApplication extends Application {    static Context context;    @Override    public void onCreate() {        // TODO Auto-generated method stub        context = getApplicationContext();        super.onCreate();    }}

主Activity代码

package com.example.getinputheight;import com.example.getinputheight.KeyboardDetectorRelativeLayout.OnSoftKeyboardListener;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.content.SharedPreferences;import android.util.Log;import android.view.Gravity;import android.view.Menu;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.inputmethod.InputMethodManager;import android.widget.Button;import android.widget.EditText;import android.widget.RelativeLayout;import android.widget.Toast;public class MainActivity extends Activity {    KeyboardDetectorRelativeLayout root_layout;    EditText et;    Button btn;    InputContentPopupWindon popu;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        btn = (Button) findViewById(R.id.btn_h);        btn.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // TODO Auto-generated method stub                InputMethodManager manager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);                manager.showSoftInput(v, InputMethodManager.RESULT_SHOWN);                manager.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);            }        });        root_layout = (KeyboardDetectorRelativeLayout) findViewById(R.id.root_layout);        root_layout.setOnSoftKeyboardListener(new OnSoftKeyboardListener() {            @Override            public void onShown(int keyboardHeight) {                // TODO Auto-generated method stub                showPopupwin();            }            @Override            public void onMeasureFinished() {                // TODO Auto-generated method stub            }            @Override            public void onHidden() {                // TODO Auto-generated method stub                if (popu != null) {                    popu.dismiss();                }            }        });    }    public void showPopupwin() {        popu = new InputContentPopupWindon(this, listener);        popu.setOutsideTouchable(false);//点击屏幕意外位置消失        popu.setFocusable(true);        SharedPreferences pref = this.getSharedPreferences("in_put", Context.MODE_PRIVATE);        int size = pref.getInt("size", 0);        Log.i("TAG", "输入框的高度为==" + size);        popu.showAtLocation(this.findViewById(R.id.root_layout), Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, size);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    OnClickListener listener = new OnClickListener() {        @Override        public void onClick(View v) {            switch (v.getId()) {                case R.id.send_btn:                    Toast.makeText(MainActivity.this, ((EditText) (popu.getContentView().findViewById(R.id.input_et))).getText().toString(), 0).show();                    //点击发送  强制隐藏输入法面板                    v.requestFocus();                    InputMethodManager manager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);                    manager.hideSoftInputFromWindow(v.getWindowToken(), 0); //隐藏                    break;                default:                    break;            }        }    };    //切回桌面时隐藏输入面板    protected void onPause() {        super.onPause();        InputMethodManager manager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);        //强制隐藏        manager.hideSoftInputFromWindow(popu.getContentView().findViewById(R.id.input_et).getWindowToken(), 0);    }    ;    //界面重新可见时如果popupwindows还可见，手动dismiss    @Override    protected void onResume() {        // TODO Auto-generated method stub        super.onResume();        if (popu != null) {            popu.dismiss();        }    }}

PopupWindows代码

package com.example.getinputheight;import android.content.Context;import android.content.IntentSender.SendIntentException;import android.graphics.drawable.ColorDrawable;import android.support.v4.view.ViewPager.LayoutParams;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnTouchListener;import android.widget.Button;import android.widget.PopupWindow;public class InputContentPopupWindon extends PopupWindow {    Context context;    OnClickListener listener;    View layout;    Button btn;    public InputContentPopupWindon(Context context, OnClickListener listener) {        this.context = context;        this.listener = listener;        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);        layout = inflater.inflate(R.layout.input_layout, null);        btn = (Button) layout.findViewById(R.id.send_btn);        btn.setOnClickListener(listener);        this.setContentView(layout);        this.setWidth(LayoutParams.MATCH_PARENT);//设置宽度        this.setHeight(LayoutParams.WRAP_CONTENT);//设置高度        ColorDrawable dw = new ColorDrawable(0xb0000000);//      this.setBackgroundDrawable(dw);//设置背景//      layout.setOnTouchListener(new OnTouchListener() {////          @Override//          public boolean onTouch(View v, MotionEvent event) {//              // TODO Auto-generated method stub//              int height = layout.findViewById(R.id.select_layout).getTop();//              int y = (int) event.getY();//              if(event.getAction()==MotionEvent.ACTION_DOWN){//                  if(y>height){//                      dismiss();//                  }//              }//              return false;//          }//      });    }}

以上就是主要代码，又需要的同学可以凑合看下

http://download.csdn.net/detail/lantiankongmo/9476028