程式碼塊:

WindowManager wm = (WindowManager) MainActivity.this.getSystemService(Context.WINDOW_SERVICE);
                DisplayMetrics dm = new DisplayMetrics();
                wm.getDefaultDisplay().getMetrics(dm);
                int width = dm.widthPixels;         // 螢幕寬度（畫素）
                int height = dm.heightPixels;       // 螢幕高度（畫素）
                float density = dm.density;         // 螢幕密度（0.75 / 1.0 / 1.5）
                int densityDpi = dm.densityDpi;     // 螢幕密度dpi（120 / 160 / 240）
                // 螢幕寬度演算法:螢幕寬度（畫素）/螢幕密度
                float screenWidth =  (width / density);  // 螢幕寬度(dp)
                float screenHeight =  (height / density);// 螢幕高度(dp)
                ObjectAnimator translationY = ObjectAnimator.ofFloat(imageView, "translationY", new float[]{0f,screenHeight+260});
                translationY.setDuration(8000);
                translationY.start();
                ObjectAnimator translationX = ObjectAnimator.ofFloat(imageView, "translationX", new float[]{0f,-(screenWidth+185)});
                translationX.setDuration(8000);
                translationX.start();
                ObjectAnimator alpha = ObjectAnimator.ofFloat(imageView, "alpha", new float[]{1.0f, 0.8f, 0.6f, 0.4f, 0.2f,0.4f,0.6f,0.8f,1.0f});
                alpha.setDuration(8000);
                alpha.start();
                translationY.addListener(new Animator.AnimatorListener() {
                    @Override
                    public void onAnimationStart(Animator animator) {

                    }

                    @Override
                    public void onAnimationEnd(Animator animator) {
                        imageView.setVisibility(View.VISIBLE);
                    }

                    @Override
                    public void onAnimationCancel(Animator animator) {

                    }

                    @Override
                    public void onAnimationRepeat(Animator animator) {

                    }
                });

                //處理圖片的點選
                if(!flag){
                    //設定圖片
                    imageView.setImageResource(R.mipmap.xin_two);
                    flag = true;
                }else{
                    imageView.setImageResource(R.mipmap.xin);
                    flag = false;
                }