android 键盘展开收起工具类

public class  {

    public static void show(View view) {
        if (view == null || view.getContext() == null) return;
        InputMethodManager imm = (InputMethodManager) view.getContext()
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        if (imm == null) return;
        view.requestFocus();
        imm.showSoftInput(view, 0);
    }

    public static void hide(View view) {
        if (view == null || view.getContext() == null) return;
        InputMethodManager imm = (InputMethodManager) view.getContext()
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        if (imm == null) return;
        imm.hideSoftInputFromWindow(view.getWindowToken(),0);
    }

    public static void toggle(View view) {
        if (view == null || view.getContext() == null) return;
        InputMethodManager imm = (InputMethodManager) view.getContext()
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        if (imm == null) return;
        imm.toggleSoftInput(0, 0);
    }
}