public class MyMiddleDialog extends Dialog {
    private Context context;
    public MyMiddleDialog(Context context) {
        super(context);
    }
    public MyMiddleDialog(Context context, int themeResId) {
        super(context, themeResId);
        this.context = context;
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.register_y_d, null);
        this.setContentView(layout);
    }
}
 

dialog樣式

<style name="MyMiddleDialogStyle" parent="@android:style/Theme.Holo.Light.Dialog">
        <!-- 視窗背景色 -->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!--是否有覆蓋-->
        <item name="android:windowContentOverlay">@null</item>
        <!-- 浮於Activity之上 -->
        <item name="android:windowIsFloating">true</item>
        <!-- 邊框 -->
        <item name="android:windowFrame">@null</item>
        <!-- Dialog以外的區域模糊效果 -->
        <item name="android:backgroundDimEnabled">true</item>
        <!-- 無標題 -->
        <item name="android:windowNoTitle">true</item>
        <!-- 半透明 -->
        <item name="android:windowIsTranslucent">true</item>
        <!--進出動畫-->
        <item name="android:windowAnimationStyle">@android:style/Animation.Translucent</item>
    </style>
 

呼叫dialog程式碼

//設定樣式
                MyMiddleDialog myMiddleDialog = new MyMiddleDialog(getActivity(), R.style.MyMiddleDialogStyle);
                Window window = myMiddleDialog.getWindow();
                //設定邊框距離
                window.getDecorView().setPadding(0, 0, 0, 0);
                //設定dialog位置
                window.setGravity(Gravity.RIGHT|Gravity.TOP);
                WindowManager.LayoutParams lp = window.getAttributes();
                //設定寬高
                lp.width = WindowManager.LayoutParams.WRAP_CONTENT;   
                lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
                window.setAttributes(lp);
                //設定點選Dialog外部任意區域關閉Dialog
                myMiddleDialog.setCanceledOnTouchOutside(true);
                myMiddleDialog.show();