AndroidEditText被软键盘遮盖的处理方法

public class KeyboardPatch
{
 private Activity activity;
 private View decorView;
 private View contentView;
 /**
  * 构造函数
  * @param act 需要解决bug的activity
  * @param contentView 界面容器，activity中一般是R.id.content，也可能是Fragment的容器，根据个人需要传递
  * */
 public KeyboardPatch(Activity act, View contentView)
 {
  this.activity = act;
  this.decorView = act.getWindow().getDecorView();
  this.cOntentView= contentView;
 }
 /**
  * 监听layout变化
  * */
 public void enable()
 {
  activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
  if (Build.VERSION.SDK_INT >= 19)
  {
   decorView.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
  }
 }
 /**
  * 取消监听
  * */
 public void disable()
 {
  activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);
  if (Build.VERSION.SDK_INT >= 19)
  {
   decorView.getViewTreeObserver().removeOnGlobalLayoutListener(onGlobalLayoutListener);
  }
 }
 private ViewTreeObserver.OnGlobalLayoutListener OnGlobalLayoutListener= new ViewTreeObserver.OnGlobalLayoutListener()
 {
  @Override
  public void onGlobalLayout()
  {
   Rect r = new Rect();
   decorView.getWindowVisibleDisplayFrame(r);
   int height = decorView.getContext().getResources().getDisplayMetrics().heightPixels;
   int diff = height - r.bottom;
   if (diff != 0)
   {
    if (contentView.getPaddingBottom() != diff)
    {
     contentView.setPadding(0, 0, 0, diff);
    }
   }
   else
   {
    if (contentView.getPaddingBottom() != 0)
    {
     contentView.setPadding(0, 0, 0, 0);
    }
   }
  }
 };
}