java - 按钮未在第一次单击时调用 OnClickListener

Question

我正在尝试开发一个 Log 在页面中，我有用户名、密码和按钮。当我第一次单击该按钮时，没有任何反应，但是当我第二次单击该按钮时，它可以正常工作。我很困惑，为什么会这样？

activity_login.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/splash_bg"
tools:context=".LoginActivity" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:orientation="vertical"
android:layout_margin="30dp" >

<EditText
    style="@style/EditText1"
    android:id="@+id/userEditText"
    android:layout_marginBottom="50dp"
    android:inputType="textNoSuggestions"
    android:singleLine="true"
    android:hint="username" />
 <EditText
    style="@style/EditText1"
    android:id="@+id/passEditText"
    android:inputType="textPassword"
    android:layout_marginBottom="50dp"
    android:hint="password" />
<Spinner
    android:id="@+id/locationSpinner"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:popupBackground="#ffffff"
    style="@style/EditText1"
   android:layout_marginBottom="50dp" />
<Button
   style="@style/Button1"
   android:focusable="true"
   android:focusableInTouchMode="true"
   android:onClick="onLoginClick"
   android:text="continue"
         />

loginActivity.java

 @SuppressLint("DefaultLocale")
    public void onLoginClick(View view) {
        String username = mUserEditText.getText().toString();
        String password = mPassEditText.getText().toString();
        String location = mLocationData.get(
                mLocationSpinner.getSelectedItemPosition()).toLowerCase();
        if (username.isEmpty() || password.isEmpty()) {
            CreatorMessenger
                    .getInstance()
                    .showMessage(this, "Error!!",
                            "You need to enter username and password both to continue!!");
            return;
        }
        User user;
        user = new User(username);/*
                             * }
                                 */
        user.setLocation(location);
        AppManager.getInstance().setLoggedInUser(user);

        APICaller.getInstance().login(username, password, location);
    }

Answer 1

您正在设置 android:focusableInTouchMode="true"因此，在第一次点击时，它会获得焦点。

请参阅 Android button - How to set focusable to true and still accept onClick listener on first click?