android---护眼灯和兼容性高的手电筒实现

程序主要有两个功能,一是护眼灯,二是手电筒,然而手电筒兼容性解决办法就是加入异常控制,避免各种异常占用启动不了手电筒.
程序主界面,没有美化,只实现基本功能.

部分代码:
护眼蒙板主要代码

    private void CreateView() {
        mWindowManager = (WindowManager) getApplication()
                .getSystemService(Context.WINDOW_SERVICE);
        wmParams = new WindowManager.LayoutParams();
        // 电话窗口。它用于电话交互（特别是呼入）。它置于所有应用程序之上，状态栏之下。
        wmParams.type = WindowManager.LayoutParams.TYPE_PHONE;
        //设置图片格式,效果为背景透明
        wmParams.format = PixelFormat.RGBA_8888;
        // 设置浮动窗口不可聚焦（实现操作除浮动窗口外的其他可见窗口的操作）
        wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
        //调整悬浮窗显示的停靠位置为左侧置顶
        wmParams.gravity = Gravity.LEFT | Gravity.TOP;
        wmParams.x = 0;
        wmParams.y = 0;
        //设置悬浮窗口长宽数据
        wmParams.width = WindowManager.LayoutParams.MATCH_PARENT;
        wmParams.height = WindowManager.LayoutParams.MATCH_PARENT;
        v = new MyView(getApplicationContext());
        mWindowManager.addView(v, wmParams);
    }

手电筒主要代码

    /** * 打开或者关闭手电筒 */
    private View.OnClickListener flash = new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // 先判断是否有闪光灯
            if (!getPackageManager().hasSystemFeature(
                    PackageManager.FEATURE_CAMERA_FLASH)) {
                Toast.makeText(MainActivity.this, "当前设备没有闪关灯", Toast.LENGTH_LONG).show();
                return;
            }
            if (flashstate){
                close();
                btnstartflash.setText("开启手电筒");
            }else if (!flashstate){
                open();
                btnstartflash.setText("关闭手电筒");
            }

        }
    };


        private void initflashmode() {
            try {
                camera = Camera.open();
                camera.setPreviewTexture(new SurfaceTexture(0));
            } catch (IOException e) {
                close();
            }
            if (camera != null) {
                parameters = camera.getParameters();
                previousflashmode = parameters.getFlashMode();
            }
            if (previousflashmode == null) {
                previousflashmode = Camera.Parameters.FLASH_MODE_OFF;
            }
        }

        //关闭相机
        private void close() {
            if (camera!=null){
                parameters.setFlashMode(previousflashmode);
                camera.setParameters(parameters);
                camera.release();
                camera = null;
                flashstate = false;
            }
        }
        //打开相机
        private void open(){

            if (camera==null) {
                initflashmode();
            }
            if (camera!=null){
                parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
                camera.setParameters(parameters);
                camera.startPreview();
                flashstate = true;
            }

        }

完整代码可以联系我[email protected]