android UI设计中遇到的坑

最新推荐文章于 2021-05-28 10:44:01 发布

原创最新推荐文章于 2021-05-28 10:44:01 发布 · 297 阅读

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前言

android开发中，总有些异想天开的想法，投入实现的时候，发现android并不如我想的那么强大，我的想法难以得到实现，获取将来会有所改变，在我得知改变之前，我是不会再尝试了。

1. toast弹出框不支持点击

toast 弹出框不支持点击，看了源码，设置了WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE，使用了反射的机制取mTN，也无法奏效

TN(String packageName, @Nullable Looper looper) {
            // XXX This should be changed to use a Dialog, with a Theme.Toast
            // defined that sets up the layout params appropriately.
            final WindowManager.LayoutParams params = mParams;
            params.height = WindowManager.LayoutParams.WRAP_CONTENT;
            params.width = WindowManager.LayoutParams.WRAP_CONTENT;
            params.format = PixelFormat.TRANSLUCENT;
            params.windowAnimations = com.android.internal.R.style.Animation_Toast;
            params.type = WindowManager.LayoutParams.TYPE_TOAST;
            params.setTitle("Toast");
            params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                    | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                    | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;

            mPackageName = packageName;

            if (looper == null) {
                // Use Looper.myLooper() if looper is not specified.
                looper = Looper.myLooper();
                if (looper == null) {
                    throw new RuntimeException(
                            "Can't toast on a thread that has not called Looper.prepare()");
                }
            }

2. toast弹出框不支持时间自定义

toast 弹出框要么是2500ms或者是3500ms，修改为其他时间无法奏效，即便是通过反射获取mTN来修改也同样无法奏效。因此估计android是非常不愿意开发者动toast时间的。

TN(String packageName, @Nullable Looper looper) {
            // XXX This should be changed to use a Dialog, with a Theme.Toast
            // defined that sets up the layout params appropriately.
            final WindowManager.LayoutParams params = mParams;
            params.height = WindowManager.LayoutParams.WRAP_CONTENT;
            params.width = WindowManager.LayoutParams.WRAP_CONTENT;
            params.format = PixelFormat.TRANSLUCENT;
            params.windowAnimations = com.android.internal.R.style.Animation_Toast;
            params.type = WindowManager.LayoutParams.TYPE_TOAST;
            params.setTitle("Toast");
            params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                    | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                    | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;

            mPackageName = packageName;

            if (looper == null) {
                // Use Looper.myLooper() if looper is not specified.
                looper = Looper.myLooper();
                if (looper == null) {
                    throw new RuntimeException(
                            "Can't toast on a thread that has not called Looper.prepare()");
                }
            }

3. 自定义控件内部控件id冲突，导致无法点击

当有两个自定义控件时，点击id冲突的控件时，点击事件无法触发。
由于项目紧急，我没有深究。