隐藏输入法并退出当前的Activity

在当前的Activity弹出输入法框的时候，按下返回键，输入框消失，而不会退出当前的Activity，在有些时候，我们可能需要退出当前的Activity，可以重写dispatchKeyEventPreIme()方法来做到这一点：

@Override public boolean dispatchKeyEventPreIme(KeyEvent event) { Activity a = getActivity(); if (null != a && event.getKeyCode() == KeyEvent.KEYCODE_BACK) { if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) { return super.dispatchKeyEventPreIme(event); } else if (event.getAction() == KeyEvent.ACTION_UP) { hideInputMethod(); a.finish(); return true; } } return super.dispatchKeyEventPreIme(event); }
隐藏输入法：

protected void hideInputMethod() { InputMethodManager imm = (InputMethodManager)getContext() .getSystemService(Context.INPUT_METHOD_SERVICE); if (null != imm) { imm.hideStatusIcon(getWindowToken()); } }
获取到Activity"

private Activity getActivity() { Context c = getContext(); if (c != null && c instanceof Activity) { return (Activity)c; } return null; }