快速解决Android适配底部返回键等虚拟键盘的问题

package com.xxxx.xxxx;

import android.graphics.Rect;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;

/**
 * Created by win7 on 2016/12/14.
 */

public class AndroidBug54971Workaround {
 // For more information, see https://code.google.com/p/android/issues/detail?id=5497
 // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

 /**
  * 关联要监听的视图
  *
  * @param viewObserving
  */
 public static void assistActivity(View viewObserving) {
  new AndroidBug54971Workaround(viewObserving);
 }

 private View mViewObserved;//被监听的视图
 private int usableHeightPrevious;//视图变化前的可用高度
 private ViewGroup.LayoutParams frameLayoutParams;

 private AndroidBug54971Workaround(View viewObserving) {
  mViewObserved = viewObserving;
  //给View添加全局的布局监听器
  mViewObserved.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
   public void onGlobalLayout() {
    resetLayoutByUsableHeight(computeUsableHeight());
   }
  });
  frameLayoutParams = mViewObserved.getLayoutParams();
 }

 private void resetLayoutByUsableHeight(int usableHeightNow) {
  //比较布局变化前后的View的可用高度
  if (usableHeightNow != usableHeightPrevious) {
   //如果两次高度不一致
   //将当前的View的可用高度设置成View的实际高度
   frameLayoutParams.height = usableHeightNow;
   mViewObserved.requestLayout();//请求重新布局
   usableHeightPrevious = usableHeightNow;
  }
 }

 /**
  * 计算视图可视高度
  *
  * @return
  */
 private int computeUsableHeight() {
  Rect r = new Rect();
  mViewObserved.getWindowVisibleDisplayFrame(r);
  return (r.bottom - r.top);
 }
}

setContentView(R.layout.content_frame);
AndroidBug54971Workaround.assistActivity(findViewById(android.R.id.content));

android:fitsSystemWindows=”true” 

<item name="android:windowTranslucentNavigation">false</item>

//控制底部虚拟键盘
  getWindow().getDecorView().setSystemUiVisibility(
    View.SYSTEM_UI_FLAG_LAYOUT_STABLE
      | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
      | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
      | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
//      | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
      | View.SYSTEM_UI_FLAG_IMMERSIVE);

  //控制底部虚拟键盘
  getWindow().getDecorView().setSystemUiVisibility(
    View.SYSTEM_UI_FLAG_LAYOUT_STABLE
      | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
      | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
      | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
//      | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
      | View.SYSTEM_UI_FLAG_IMMERSIVE);
  getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);

  //让虚拟键盘一直不显示
  Window window = getWindow();
  WindowManager.LayoutParams params = window.getAttributes();
  params.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION|View.SYSTEM_UI_FLAG_IMMERSIVE;
  window.setAttributes(params);