需求

ProgressDialog全屏显示,加载进度在屏幕正中间,有背景颜色;

关键代码

    private void showFullScreenDialog() {
        Dialog dialog = new Dialog(this, R.style.dialog_style);
        //设置是否允许Dialog可以被点击取消,也会阻止Back键
        dialog.setCancelable(false);
        //获取Dialog窗体的根容器
        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        ViewGroup root = (ViewGroup) dialog.getWindow().getDecorView().findViewById(android.R.id.content);
        //设置窗口大小为屏幕大小
        WindowManager wm = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
        Point screenSize = new Point();
        wm.getDefaultDisplay().getSize(screenSize);
        root.setLayoutParams(new LinearLayout.LayoutParams(screenSize.x, screenSize.y));
        //获取自定义布局,并设置给Dialog
        View view = inflater.inflate(R.layout.dialog_layout, root, false);
        dialog.setContentView(view, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        dialog.show();
    }

R.style.dialog_style样式

    <style name="dialog_style" parent="Theme.AppCompat.Dialog">
        <!--设置背景颜色-->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!--控制全屏-->
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowFullscreen">true</item>
        <item name="android:windowIsTranslucent">true</item>
        <!--设置是否显示"遮罩"层-->
        <item name="android:backgroundDimEnabled">true</item>
    </style>