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