android 仿iphoneX上滑退出应用动画(二)

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上文android 仿iphoneX上滑退出应用动画(一)已经说了思路和解决思想，这里对代码进行实现。

先明确，锁屏界面，通知栏和工具栏下滑界面是不需要滑动条的，launcher界面需要一个透明的滑动条，其他界面根据背景色确定需要白色还是黑色的滑动条。

监听到广播top_activity_changes，说明activity有变化

// add by csc for slideif(topAppPackageName!=null){                if(!isInLockScreen())                addOrRemoveSlideView(true);                if(topAppPackageName.equals("com.mediatek.oobe")&&!topAppClassName.equals("com.mediatek.oobe.basic.OobeLockScreenActivity")){                    addOrRemoveSlideView(false);                }                if(!topAppClassName.equals("com.android.systemui.recents.RecentsActivity"))                    isOpenRecents = false;}// add by csc for slide

setPanelExpanded方法判断左右下滑的通知栏和工具栏是否下滑，还可以判断锁屏界面的出现和消失，所以这里也需要addOrRemoveSlideView来remove滑动条

public void setPanelExpanded(boolean isExpanded) { if(DEBUG)Log.i("notification_panel","PhoneStatusBar   setPanelExpanded()  isExpanded="+isExpanded);        mStatusBarWindowManager.setPanelExpanded(isExpanded);        if (isExpanded && getBarState() != StatusBarState.KEYGUARD) {            if (DEBUG) {                Log.v(TAG, "clearing notification effects from setPanelExpanded");            }            clearNotificationEffects();        }        if (!isExpanded) {            removeRemoteInputEntriesKeptUntilCollapsed();     mNotificationsDislpayLayout.resetView();//added by xss for ios11     if(getBarState() == StatusBarState.KEYGUARD)unLockScreen();//added by xss for ios11 face unlock        }        //showOrHideNavigationBar(!isExpanded);//modified by xss for ios11 for NavigationBarView        addOrRemoveSlideView(!isExpanded);// add by csc for slide    }

addOrRemoveSlideView方法的作用是add滑动条或者remove滑动条，其中用isAddSlideView判断是否已经存在滑动条，如果已经存在则不在添加

private void addOrRemoveSlideView(boolean isAdd){        WindowManager  mWindowManager1 = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);        Display mDisplay = mWindowManager1.getDefaultDisplay();        DisplayMetrics mDisplayMetrics = new DisplayMetrics();        mDisplay.getRealMetrics(mDisplayMetrics);        Matrix mDisplayMatrix = new Matrix();        float[] dims = { mDisplayMetrics.widthPixels,mDisplayMetrics.heightPixels};        x = (int)mDisplayMetrics.widthPixels;        y = (int)mDisplayMetrics.heightPixels;        if(isAdd){            if(topAppPackageName!=null) {                if (!isAddSlideView) {                    final int flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE                            | WindowManager.LayoutParams.FLAG_TOUCHABLE_WHEN_WAKING                            | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH                            | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL                            | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;                    final WindowManager.LayoutParams lp = new WindowManager.LayoutParams(                            /*ViewGroup.LayoutParams.MATCH_PARENT*/250,                            /*ViewGroup.LayoutParams.MATCH_PARENT*/20,                            WindowManager.LayoutParams.TYPE_STATUS_BAR_PANEL,                            flags,                            PixelFormat.TRANSLUCENT);                    lp.flags |= WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED;                    lp.gravity = Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL;                    mSlideView = new ImageView(mContext);                    mSlideView.setOnTouchListener(setOnTouchSlideListener);                    if(topAppPackageName.equals("com.hskj.hometest")){                        mSlideView.setBackgroundResource(0);                    }else if(topAppPackageName.equals("com.android.mms")) {                        mSlideView.setBackgroundResource(R.drawable.slide_black);                    }else{                        new Handler().postDelayed(new Runnable() {                            @Override                            public void run() {                                Bitmap mBitmap = takeScreenshot();                                int pixel = mBitmap.getPixel(mBitmap.getWidth()/2, mBitmap.getHeight()-1);                                int redValue = Color.red(pixel);                                int blueValue = Color.blue(pixel);                                int greenValue = Color.green(pixel);                                int grayLevel = (int) (redValue * 0.299 + blueValue * 0.587 + greenValue * 0.114);                                if (grayLevel >= 220) {                                    mSlideView.setBackgroundResource(R.drawable.slide_black);                                } else {                                    mSlideView.setBackgroundResource(R.drawable.slide_white);                                }                            }                        },500);                    }                    mWindowManager.addView(mSlideView, lp);                    isAddSlideView = true;                }else{                    if(topAppPackageName.equals("com.hskj.hometest")){                        mSlideView.setBackgroundResource(0);                    }else if(topAppPackageName.equals("com.android.mms")) {                        mSlideView.setBackgroundResource(R.drawable.slide_black);                    }else {                         new Handler().postDelayed(new Runnable() {                                                         @Override                                                         public void run() {                                                             Bitmap mBitmap = takeScreenshot();                                                             Log.d("chenshichun"," "+this.getClass().getCanonicalName()+" ::::::mBitmap.getWidth()/2:::  "+mBitmap.getWidth()/2+"   mBitmap.getHeight()-1   "+(mBitmap.getHeight()-1));                                                             int pixel = mBitmap.getPixel(mBitmap.getWidth()/2, mBitmap.getHeight()-1);                                                             Log.d("chenshichun"," "+this.getClass().getCanonicalName()+" ::::pixel:::::"+pixel);                                                             int redValue = Color.red(pixel);                                                             int blueValue = Color.blue(pixel);                                                             int greenValue = Color.green(pixel);                                                             Log.d("chenshichun"," "+this.getClass().getCanonicalName()+" ::::redValue:::::"+redValue);                                                             int grayLevel = (int) (redValue * 0.299 + blueValue * 0.587 + greenValue * 0.114);                                                             if (grayLevel >= 220) {                                                                 mSlideView.setBackgroundResource(R.drawable.slide_black);                                                             } else {                                                                 mSlideView.setBackgroundResource(R.drawable.slide_white);                                                             }                                                         }                                                     },500);                    }                }            }        }else{            if (isAddSlideView) {                mWindowManager.removeView(mSlideView);                isAddSlideView = false;            }        }    }

该段代码用来获取照片上某一点的颜色，通过算法判断该颜色是深色还是浅色，深色用白滑动条，浅色用黑滑动条

Bitmap mBitmap = takeScreenshot();                                int pixel = mBitmap.getPixel(mBitmap.getWidth()/2, mBitmap.getHeight()-1);                                int redValue = Color.red(pixel);                                int blueValue = Color.blue(pixel);                                int greenValue = Color.green(pixel);                                int grayLevel = (int) (redValue * 0.299 + blueValue * 0.587 + greenValue * 0.114);                                if (grayLevel >= 220) {                                    mSlideView.setBackgroundResource(R.drawable.slide_black);                                } else {                                    mSlideView.setBackgroundResource(R.drawable.slide_white);                                }

到此，就把滑动条加上去了。

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