基于界面适配华为手机的虚拟按键的解决方法

if (AndroidWorkaround.checkDeviceHasNavigationBar(this)) {
 AndroidWorkaround.assistActivity(findViewById(android.R.id.content));
}

/**
* 解决底部屏幕按键适配
* Created by Mercury on 2016/10/25.
*/
public class AndroidWorkaround {
 public static void assistActivity(View content) {
  new AndroidWorkaround(content);
 }
 private View mChildOfContent;
 private int usableHeightPrevious;
 private ViewGroup.LayoutParams frameLayoutParams;
 private AndroidWorkaround(View content) {
  mChildOfCOntent= content;
  mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
   public void onGlobalLayout() {
    possiblyResizeChildOfContent();
   }
  });
  frameLayoutParams = mChildOfContent.getLayoutParams();
 }
 private void possiblyResizeChildOfContent() {
  int usableHeightNow = computeUsableHeight();
  if (usableHeightNow != usableHeightPrevious) {
   frameLayoutParams.height = usableHeightNow;
   mChildOfContent.requestLayout();
   usableHeightPrevious = usableHeightNow;
  }
 }
 private int computeUsableHeight() {
  Rect r = new Rect();
  mChildOfContent.getWindowVisibleDisplayFrame(r);
  return (r.bottom);
 }
 public static boolean checkDeviceHasNavigationBar(Context context) {
  boolean hasNavigatiOnBar= false;
  Resources rs = context.getResources();
  int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");
  if (id > 0) {
   hasNavigatiOnBar= rs.getBoolean(id);
  }
  try {
   Class systemPropertiesClass = Class.forName("android.os.SystemProperties");
   Method m = systemPropertiesClass.getMethod("get", String.class);
   String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");
   if ("1".equals(navBarOverride)) {
    hasNavigatiOnBar= false;
   } else if ("0".equals(navBarOverride)) {
    hasNavigatiOnBar= true;
   }
  } catch (Exception e) {
  }
  return hasNavigationBar;
 }
}