Android笔记之平移View

                if (!scheduled) {
                    translationTimer.schedule(new TimerTask() {
                        private int left;

                        @Override
                        public void run() {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    int width = tv.getWidth();
                                    tv.setLeft(++left);
                                    tv.setRight(left + width);
                                    DisplayMetrics metrics = new DisplayMetrics();
                                    getWindowManager().getDefaultDisplay().getMetrics(metrics);
                                    if (left > metrics.widthPixels) {
                                        left = -width;
                                    }
                                }
                            });
                        }
                    }, 0, 10);
                    scheduled = true;
                }