TextView 为空判别

 

 

String user = username_et.getText().toString().trim();
		String pd = password_et.getText().toString().trim();
		if (TextUtils.isEmpty(user)) {
			username_et.setError("用户名不能为空！");
			username_et.requestFocus();
			username_et.setText("");
			return;
			// ToastHelp.showToast(this, "用户名或密码不能为空！", 1000);
		}