Android - 在Spinner选择之后将焦点设置在EditText上

Question

我在屏幕上显示以下项目:

EditText Forename
Spinner gender selection (Male | Female)
EditText Email

首次启动应用程序时,我希望在Forename EditText上设置焦点.然后在Spinner中选择"Male"或"Female"之后,我希望在位于微调器下方的Email EditText上设置焦点.

我曾经在电子邮件EditText上setOnItemSelectedListener设置requestFocus,但问题是每当我启动应用程序时它会自动设置焦点在这个EditText上.这是因为默认情况下,微调器显示第一个选择,在这种情况下是"男性",因此它认为已经进行了选择并将焦点设置在"电子邮件"字段上.

我不介意默认情况下已经在微调器中选择了第一个选项,但是如果我可以以某种方式覆盖requestFocus要在Forename EditText上设置的那个很棒.

XML:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/LinearLayout" 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

   <EditText
        android:id="@+id/ForenameForm"
        android:layout_width="285dp"
        android:layout_height="65dp"
        android:hint="@string/forenameHint"
        android:lines="1"
        android:singleLine="true"
        android:textSize="20sp" >
    </EditText>


   <Spinner  
        android:id="@+id/SpinnerGender" 
        android:spinnerMode="dialog"
        android:textSize="30sp" 
        android:layout_width="285dp"
        android:layout_height="60dp"
        android:prompt="@string/spinnerGender"  
        android:entries="@array/genderList">

    </Spinner>

   <EditText
        android:id="@+id/EmailForm"
        android:layout_width="285dp"
        android:layout_height="65dp"
        android:hint="@string/emailHint"
        android:lines="1"
        android:singleLine="true"
        android:textSize="20sp" >
    </EditText>

</LinearLayout>

活动类:

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final EditText forename=(EditText)findViewById(R.id.ForenameForm);
        forename.requestFocus();

        final EditText email=(EditText)findViewById(R.id.EmailForm);

        Spinner spinner=(Spinner)findViewById(R.id.SpinnerGender);
        spinner.setFocusable(true);
        spinner.setFocusableInTouchMode(true);   


        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
        {

            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
                email.requestFocus();               
            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {

            }               
        });  
    }

Answer 1

这个解决方案怎么样？

define a boolean flag and set it default false.

in oncreate set the focus of forname

in setOnItemSelectedListener 
     if flag is false then set flag true
     else focus email 

所以你的代码就像

boolean flag = false;
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final EditText forename=(EditText)findViewById(R.id.ForenameForm);
        forename.requestFocus();

        final EditText email=(EditText)findViewById(R.id.EmailForm);

        Spinner spinner=(Spinner)findViewById(R.id.SpinnerGender);
        spinner.setFocusable(true);
        spinner.setFocusableInTouchMode(true);   


        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
        {

            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
              // changes here
                if(flag == false)
                    flag = true;
                else 
                    email.requestFocus();               
            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {

            }               
        });  
    }