6月8日学习日志

今天学习了获取屏幕宽高。

public static int[] getScreenHW2(Context context) {
    WindowManager manager = (WindowManager) context.
    getSystemService(Context.WINDOW_SERVICE);
    DisplayMetrics dm = new DisplayMetrics();
    manager.getDefaultDisplay().getMetrics(dm);
    int width = dm.widthPixels;
    int height = dm.heightPixels;
    int[] HW = new int[] { width, height };
    return HW;
}

设置窗口全屏显示。

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        getSupportActionBar().hide();

保持屏幕常亮。

public void setKeepScreenOn(Activity activity,boolean keepScreenOn)  
{  
    if(keepScreenOn)  
    {  
        activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);  
    }else{  
        activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);  
    }  
} 

简单悬浮框的实现。

private void createWindowView() {
    btnView = new Button(getApplicationContext());
    btnView.setBackgroundResource(R.mipmap.ic_launcher);
    windowManager = (WindowManager) getApplicationContext()
            .getSystemService(Context.WINDOW_SERVICE);
    params = new WindowManager.LayoutParams();

    // 设置Window Type
    params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
    // 设置悬浮框不可触摸
    params.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
            | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
    // 悬浮窗不可触摸，不接受任何事件,同时不影响后面的事件响应
    params.format = PixelFormat.RGBA_8888;
    // 设置悬浮框的宽高
    params.width = 200;
    params.height = 200;
    params.gravity = Gravity.LEFT;
    params.x = 200;
    params.y = 000;
    // 设置悬浮框的Touch监听
    btnView.setOnTouchListener(new View.OnTouchListener() {
        //保存悬浮框最后位置的变量
        int lastX, lastY;
        int paramX, paramY;

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    lastX = (int) event.getRawX();
                    lastY = (int) event.getRawY();
                    paramX = params.x;
                    paramY = params.y;
                    break;
                case MotionEvent.ACTION_MOVE:
                    int dx = (int) event.getRawX() - lastX;
                    int dy = (int) event.getRawY() - lastY;
                    params.x = paramX + dx;
                    params.y = paramY + dy;
                    // 更新悬浮窗位置
                    windowManager.updateViewLayout(btnView, params);
                    break;
            }
            return true;
        }
    });
    windowManager.addView(btnView, params);
    isAdded = true;
}