获取屏幕和控件的宽度和高度

/**
     * 获取屏幕宽度
     */
    public final static int getWindowsWidth(Activity activity) {
        DisplayMetrics dm = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
        return dm.widthPixels;
    }

    /**
     * 获取屏幕高度
     */
    public final static int getWindowsHight(Activity activity) {
        DisplayMetrics dm = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
        return dm.heightPixels;
    }

    /**
     * 获取控件高度
     */
    public final static int getViewHight(View view) {
        int w = View.MeasureSpec.makeMeasureSpec(0,
                View.MeasureSpec.UNSPECIFIED);
        int h = View.MeasureSpec.makeMeasureSpec(0,
                View.MeasureSpec.UNSPECIFIED);
        view.measure(w, h);
        int height = view.getMeasuredHeight();
        return height;
    }

    /**
     * 获取控件宽度
     */
    public final static int getViewWidth(View view) {
        int w = View.MeasureSpec.makeMeasureSpec(0,
                View.MeasureSpec.UNSPECIFIED);
        int h = View.MeasureSpec.makeMeasureSpec(0,
                View.MeasureSpec.UNSPECIFIED);
        view.measure(w, h);
        int width = view.getMeasuredWidth();
        return width;
    }