Android监听软键盘弹出与隐藏的两种方法

@Override  public void onLayoutChange(View v, int left, int top, int right,      int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {    //old是改变前的左上右下坐标点值，没有old的是改变后的左上右下坐标点值    //现在认为只要控件将Activity向上推的高度超过了1/3屏幕高，就认为软键盘弹起    if(oldBottom != 0 && bottom != 0 &&(oldBottom - bottom > keyHeight)){      Toast.makeText(MainActivity.this, "监听到软键盘弹起...", Toast.LENGTH_SHORT).show();    }else if(oldBottom != 0 && bottom != 0 &&(bottom - oldBottom > keyHeight)){      Toast.makeText(MainActivity.this, "监听到软件盘关闭...", Toast.LENGTH_SHORT).show();    }  }

//contentlayout是最外层布局mChildOfContent = contentlayout.getChildAt(0);mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {     public void onGlobalLayout() {           possiblyResizeChildOfContent();  }});

private void possiblyResizeChildOfContent() {  int usableHeightNow = computeUsableHeight();  if (usableHeightNow != usableHeightPrevious) {       int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();       int heightDifference = usableHeightSansKeyboard - usableHeightNow;       if (heightDifference > (usableHeightSansKeyboard / 4)) {         // 键盘弹出       } else {         // 键盘收起         productInfo.setVisibility(View.GONE);         productInfoEnd.setText(productInfo.getText().toString());    }       mChildOfContent.requestLayout();        usableHeightPrevious = usableHeightNow;  }}

private int computeUsableHeight() {   Rect r = new Rect();  mChildOfContent.getWindowVisibleDisplayFrame(r);  return (r.bottom - r.top);}