目標

點選Faculty彈出院系單選對話方塊，將選擇的內容顯示在EditText中
Faculty是一個Edittext控制元件。

1,設定EditText屬性

使用以下兩句設定EditText為不可輸入且不可彈出輸入法

android:cursorVisible="false"
android:editable="false"

<EditText
            android:text="" 
            android:id="@+id/etFaculty"
            android:layout_width="match_parent"
 

            android:layout_height="wrap_content"
            android:layout_below="@+id/etBirthday"
            android:cursorVisible="false"
            android:editable="false"
            android:hint="Faculty"
         />

2，設定EditText的點選事件，使用setOnTouchListener

private final static int FACULTY_DIA = 2
 
;
private EditText etFaculty;
@Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_personal_info);
        etFaculty = (EditText) findViewById(R.id.etFaculty);
        etFaculty.setOnTouchListener(new
 
 View.OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                showDialog(FACULTY_DIA);
                return false;
            }
        });

3，建立一個院系名的array資源 “faculty”

4，建立單選對話方塊

protected Dialog onCreateDialog(int id) {
        Dialog dialog = null;
        switch (id) {
        case FACULTY_DIA:
             Builder builder1 = new android.app.AlertDialog.Builder(this);
            // 設定對話方塊的圖示
            builder.setIcon(R.drawable.header);
            // 設定對話方塊的標題
        Builder setTitle1 = builder1.setTitle("Faculty");
            builder1.setSingleChoiceItems(R.array.faculty, 0, new OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    String faculty = getResources().getStringArray(R.array.faculty)[which];
                    etFaculty.setTextSize(15);
                    etFaculty.setText(faculty);
                }
            });

            // 新增一個確定按鈕
            builder1.setPositiveButton(" OK ", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {

                }
            });
            // 建立一個單選按鈕對話方塊
            dialog = builder1.create();
            break;
}

5，修改對話方塊的字型大小

在styles.xml定義對話方塊字型大小：

    </style>
    <style name="dialog" parent="@android:style/Theme.Dialog">
    <item name="android:textSize">15sp</item>
  </style>

加入後styles.xml的內容如下所示：

<resources>

    <!--
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
    -->
    <style name="AppBaseTheme" parent="android:Theme.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>
    <style name="dialog" parent="@android:style/Theme.Dialog">
    <item name="android:textSize">15sp</item>
  </style>
</resources>

修改建立單選對話方塊的程式碼：

case FACULTY_DIA:
            // Dialog dialog = null;
            ContextThemeWrapper contextThemeWrapper = new ContextThemeWrapper(this, R.style.dialog);
            Builder builder1 = new AlertDialog.Builder(contextThemeWrapper);

            // Builder builder1 = new android.app.AlertDialog.Builder(this);
            // 設定對話方塊的圖示
            // builder.setIcon(R.drawable.header);
            // 設定對話方塊的標題
            Builder setTitle1 = builder1.setTitle("Faculty");
            // 0: 預設第一個單選按鈕被選中
            builder1.setSingleChoiceItems(R.array.faculty, 0, new OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    String faculty = getResources().getStringArray(R.array.faculty)[which];
                    etFaculty.setTextSize(15);
                    etFaculty.setText(faculty);
                }
            });

            // 新增一個確定按鈕
            builder1.setPositiveButton(" OK ", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {

                }
            });
            // 建立一個單選按鈕對話方塊
            dialog = builder1.create();
            break;