Question

有没有办法用WindowManager使用Animation（在android项目中）给视图充气？即使使用网站中的示例，我也无法做到！我用了很多例子，但都没有用！

public BannerLayout(Activity activity, final Context context) {
    super(context);

    this.context = context;

    final WindowManager.LayoutParams params = new WindowManager.LayoutParams( 
            WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
            WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN | 
            WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
            PixelFormat.TRANSLUCENT); 

    wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);    

    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    this.popupLayout = (RelativeLayout) inflater.inflate(R.layout.popup_activity, null);
    this.popupLayout.setVisibility(GONE);
    this.setActive(false);

    wm.addView(this.popupLayout, params);

    context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}


private void show(){
    Animation in = AnimationUtils.loadAnimation(this.context, android.R.anim.fade_in);
    this.popupLayout.setAnimation(in);

    this.setActive(true);
    this.popupLayout.setVisibility(VISIBLE);
}

Answer 1

我不确定您的任务的确切要求，但有两种方法可以为窗口提供动画：

使用WindowManager.LayoutParams.windowAnimations，如下所示：
```
params.windowAnimations = android.R.style.Animation_Translucent;
```

添加额外的“容器”视图，因为WindowManager不是真正的ViewGroup，因此添加视图的普通动画无效。 This question has been asked already但是它缺少代码。我会用以下方式应用它：

public class BannerLayout extends View {

    private final Context mContext;

    private final ViewGroup mPopupLayout;

    private final ViewGroup mParentView;

    public BannerLayout(Activity activity, final Context context) {
        super(context);

        mContext = context;

        final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
                WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN |
                        WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
                PixelFormat.TRANSLUCENT);

        final WindowManager mWinManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        mPopupLayout = (RelativeLayout) inflater.inflate(R.layout.popup_activity, null);
        mPopupLayout.setVisibility(GONE);

        params.width = ActionBar.LayoutParams.WRAP_CONTENT;
        params.height = ActionBar.LayoutParams.WRAP_CONTENT;

        // Default variant
        // params.windowAnimations = android.R.style.Animation_Translucent;

        mParentView = new FrameLayout(mContext);

        mWinManager.addView(mParentView, params);

        mParentView.addView(mPopupLayout);
        mPopupLayout.setVisibility(GONE);
    }

    /**
     * Shows view
     */
    public void show(){
        final Animation in = AnimationUtils.loadAnimation(this.mContext, android.R.anim.fade_in);

        in.setDuration(2000);

        mPopupLayout.setVisibility(VISIBLE);
        mPopupLayout.startAnimation(in);
    }

    /**
     * Hides view
     */
    public void hide() {
        mPopupLayout.setVisibility(GONE);
    }
}

Answer 2

是的确有可能。只要您要设置动画的视图位于容器内，按容器我的意思是例如LinearLayout或任何其他布局都可以。最后，要设置动画的视图不应该是窗口的根视图，因此您应该能够为视图设置动画:)希望它有所帮助

带动画的WindowManager（可能吗？）

2 个答案: