Android工具類整理

1. KeyboardUtils（鍵盤工具類）

import android.content.Context;
import android.view.View;
import android.view.inputmethod.InputMethodManager;

public class KeyboardUtils {

  /**
   * Hides the soft keyboard from screen
   *
   * @param view Usually the EditText, but in dynamically  layouts you should pass the layout
   * instead of the EditText
   * @return true, if keyboard has been hidden, otherwise false (i.e. the keyboard was not displayed
   * on the screen or no Softkeyboard because device has hardware keyboard)
   */
  public static boolean hideKeyboard(View view) {

    if (view == null) {
      throw new NullPointerException("View is null!");
    }

    try {
      InputMethodManager imm =
          (InputMethodManager) view.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);

      if (imm == null) {
        return false;
      }

      imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
    } catch (Exception e) {
      return false;
    }

    return true;
  }
}