Android获取软键盘的高度、键盘的打开与关闭、监听键盘处于打开还是关闭状态

最近在项目中，需要获取到软键盘的高度，再将底部的布局上移键盘的高度，话不多说，直接上代码：

 //一个静态变量存储高度
public static int keyboardHeight = 0;
boolean isVisiableForLast = false;
ViewTreeObserver.OnGlobalLayoutListener onGlobalLayoutListener = null;

public void addOnSoftKeyBoardVisibleListener() {
    if (keyboardHeight > 0) {
        return;
    }
    final View decorView = getWindow().getDecorView();
    onGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            Rect rect = new Rect();
            decorView.getWindowVisibleDisplayFrame(rect);
            //计算出可见屏幕的高度
            int displayHight = rect.bottom - rect.top;
            //获得屏幕整体的高度
            int hight = decorView.getHeight();
            boolean visible = (double) displayHight / hight < 0.8;
            int statusBarHeight = 0;
            try {
                Class c = Class.forName("com.android.internal.R$dimen");
                Object obj = c.newInstance();
                Field field = c.getField("status_bar_height");
                int x = Integer.parseInt(field.get(obj).toString());
                statusBarHeight = getApplicationContext().getResources().getDimensionPixelSize(x);
            } catch (Exception e) {
                e.printStackTrace();
            }

            if (visible && visible != isVisiableForLast) {
                //获得键盘高度
                keyboardHeight = hight - displayHight - statusBarHeight;
                Log.i("keyboardHeight==1213==", "" + keyboardHeight);

            }
            isVisiableForLast = visible;
        }
    };
    decorView.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
}

键盘的打开与关闭操作：

public class KeybordS {

/**
 * 打开软键盘
 */
public static void openKeybord(EditText mEditText, Context mContext) {
    mEditText.setFocusable(true);
    mEditText.setFocusableInTouchMode(true);
    mEditText.requestFocus();

    InputMethodManager imm = (InputMethodManager) mContext
            .getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.showSoftInput(mEditText, InputMethodManager.RESULT_SHOWN);
    imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,
            InputMethodManager.HIDE_IMPLICIT_ONLY);
}

/**
 * 关闭软键盘
 */
public static void closeKeybord(EditText mEditText, Context mContext) {
    InputMethodManager imm = (InputMethodManager) mContext
            .getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.hideSoftInputFromWindow(mEditText.getWindowToken(), 0);
}

 /**
 * 关闭软键盘
 */
 public static void hideInput(Activity activity) {
    if (activity.getCurrentFocus() != null) {
        InputMethodManager inputManager = (InputMethodManager) activity.getSystemService(INPUT_METHOD_SERVICE);
        inputManager.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
    }
}

/**
 * 判断当前软键盘是否打开
 */
public static boolean isSoftInputShow(Activity activity) {

    // 虚拟键盘隐藏 判断view是否为空
    View view = activity.getWindow().peekDecorView();
    if (view != null) {
        // 隐藏虚拟键盘
        InputMethodManager inputmanger = (InputMethodManager) activity
                .getSystemService(Activity.INPUT_METHOD_SERVICE);
 //  inputmanger.hideSoftInputFromWindow(view.getWindowToken(),0);

        return inputmanger.isActive() && activity.getWindow().getCurrentFocus() != null;
    }
    return false;
}

}

监听键盘处于打开还是关闭状态：

     private void setListenerToRootView() {
final View rootView = getWindow().getDecorView().findViewById(android.R.id.content);
rootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {

        boolean mKeyboardUp = isKeyboardShown(rootView);
        if (mKeyboardUp) {
            //键盘弹出
            //Toast.makeText(getApplicationContext(), "键盘弹出", Toast.LENGTH_SHORT).show(); 
        } else {
            //键盘收起
            //Toast.makeText(getApplicationContext(), "键盘收起", Toast.LENGTH_SHORT).show();
        }
    }
});
}


private boolean isKeyboardShown(View rootView) {
final int softKeyboardHeight = 100;
Rect r = new Rect();
rootView.getWindowVisibleDisplayFrame(r);
DisplayMetrics dm = rootView.getResources().getDisplayMetrics();
int heightDiff = rootView.getBottom() - r.bottom;
return heightDiff > softKeyboardHeight * dm.density;
}