KeyBoardUtil .java

/**
 * 操作輸入法的工具類。可以方便的關閉和顯示輸入法.
 */
public class KeyBoardUtil {

    private static KeyBoardUtil instance;
    private InputMethodManager mInputMethodManager;
    private static Activity mActivity;

    private KeyBoardUtil() {
        mInputMethodManager = (InputMethodManager) mActivity.getSystemService(INPUT_METHOD_SERVICE);

    }

    public
 
 static KeyBoardUtil getInstance(Activity activity) {
        mActivity = activity;
        if (instance == null) {
            instance = new KeyBoardUtil();
        }
        return instance;
    }

    /**
     * 強制顯示輸入法
     */
    public void show() {
        show(mActivity.getWindow().getCurrentFocus());
    }

    public
 
 void show(View view) {
        mInputMethodManager.showSoftInput(view, InputMethodManager.SHOW_FORCED);
    }

    /**
     * 強制關閉輸入法
     */
    public void hide() {
        hide(mActivity.getWindow().getCurrentFocus());
    }

    public void hide(View view) {
        mInputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0
 
);
    }

    /**
     * 如果輸入法已經顯示，那麼就隱藏它；如果輸入法現在沒顯示，那麼就顯示它
     */
    public void showOrHide() {
        mInputMethodManager.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
    }



}

使用.hide()會報錯，報焦點獲取失敗時應使用 hide(View view) ，傳入EditTeview控制元件id。