Android屏幕适配框架（一）

//ui图上的宽高
private static final int BASE_WIDTH = 1080;
private static final int BASE_HEIGHT = 1920; // ui给的图不包含状态栏，后面要减去状态栏的高度

//设备的真实宽高
private static int displayWidth;
private static int displayHeight; // 后面要减去状态栏的高度
//状态栏高度
private int statusBarHeight;
//屏幕信息
private DisplayMetrics displayMetrics;

  WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
  displayMetrics = new DisplayMetrics();
  windowManager.getDefaultDisplay().getMetrics(displayMetrics);

   //使用运行过程中的资源文件
    private int getStatusBarHeight(Context context) {
        int statusBarHeight = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (statusBarHeight > 0) {
            return statusBarHeight;
        }

        //上面方法获取不到的话，使用反射资源获取
        return getStatusBarHeightByAndroid(context, "com.android.internal.R$dimen", "system_bar_height", 48);
    }

    private int getStatusBarHeightByAndroid(Context context, String className, String fieldName, int defValue) {
        try {
            //获取class
            Class aClass = Class.forName(className);
            //获取实例
            Object o = aClass.newInstance();
            Field field = aClass.getField(fieldName);
            int id = Integer.parseInt(field.get(o).toString());
            return context.getResources().getDimensionPixelOffset(id);
        } catch (Exception e) {
            return defValue;
        }
    }

    /**
     * 设置真实长宽
     */
    public void refreshDisplayMetrics() {
        //判断横竖屏
        if (displayMetrics.widthPixels > displayMetrics.heightPixels) {//横屏
            displayWidth = displayMetrics.heightPixels;
            displayHeight = displayMetrics.widthPixels;
        } else { //竖屏
            displayWidth = displayMetrics.widthPixels;
            displayHeight = displayMetrics.heightPixels;
        }
    }

    //初始化真实宽高
    public void init(Context context) {
        //使用WindowManager获取
        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        displayMetrics = new DisplayMetrics();
        windowManager.getDefaultDisplay().getMetrics(displayMetrics);

        //获取状态栏高度
        statusBarHeight = getStatusBarHeight(context);
        //根据状态栏高度初始化真实宽高
        refreshDisplayMetrics();
    }

    public float getWidth(float width) {
        return width * displayWidth / BASE_WIDTH;
    }

    public float getHeight(float height) {
        return height * (displayHeight - statusBarHeight) / (BASE_HEIGHT - statusBarHeight);
    }

/**
 * view设置长宽等属性的逻辑处理
 * 需使用px
 */
public class ViewCalculateUtil {
    /**
     * 设置layoutparams
     *
     * @param view
     * @param width
     * @param height
     * @param topMargin
     * @param bottomMargin
     * @param leftMargin
     * @param rightMargin
     */
    public static void setLayoutParams(View view, int width, int height, int topMargin, int bottomMargin, int leftMargin, int rightMargin) {
        ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) view.getLayoutParams();

        if (layoutParams != null) {

            if (width != LinearLayout.LayoutParams.MATCH_PARENT &&
                    width != LinearLayout.LayoutParams.WRAP_CONTENT) {
                layoutParams.width = (int) UIUtils.getInstance().getWidth(width);
            } else {
                layoutParams.width = width;
            }

            if (height != LinearLayout.LayoutParams.MATCH_PARENT && height != LinearLayout.LayoutParams.WRAP_CONTENT) {
                layoutParams.height = (int) UIUtils.getInstance().getHeight(height);
            } else {
                layoutParams.height = height;
            }

            layoutParams.topMargin = (int) UIUtils.getInstance().getHeight(topMargin);
            layoutParams.bottomMargin = (int) UIUtils.getInstance().getHeight(bottomMargin);
            layoutParams.leftMargin = (int) UIUtils.getInstance().getWidth(leftMargin);
            layoutParams.rightMargin = (int) UIUtils.getInstance().getWidth(rightMargin);
            view.setLayoutParams(layoutParams);
        }
    }

    /**
     * 设置字号
     *
     * @param view
     * @param size
     */
    public static void setTextSize(TextView view, int size) {
        view.setTextSize(TypedValue.COMPLEX_UNIT_PX, UIUtils.getInstance().getHeight(size));
    }

    /**
     * 设置view的内边距
     *
     * @param view
     * @param topPadding
     * @param bottomPadding
     * @param leftpadding
     * @param rightPadding
     */
    public static void setViewPadding(View view, int topPadding, int bottomPadding, int leftpadding, int rightPadding) {
        view.setPadding((int) UIUtils.getInstance().getWidth(leftpadding),
                (int) UIUtils.getInstance().getHeight(topPadding),
                (int) UIUtils.getInstance().getWidth(rightPadding),
                (int) UIUtils.getInstance().getHeight(bottomPadding));
    }
}

/**
 * 逐层处理viewgroup
 */
public class ViewsParseUtil {

    /**
     * 对activity中的所有控件进行适配
     * @param activity
     */
    protected static void parseAcitvity(Activity activity) {
        //获取DecorView中id为content的布局
        final ViewGroup context = (ViewGroup) activity.findViewById(android.R.id.content);
        context.post(new Runnable() {
            @Override
            public void run() {
                catchViewGroup(context);
            }
        });
    }

    /**
     * 对组件进行适配
     * @param viewGroup
     */
    protected static void catchViewGroup(ViewGroup viewGroup) {
        for (int i = 0; i < viewGroup.getChildCount(); i++) {
            View view = viewGroup.getChildAt(i);
            catchChildView(view);
        }
    }

    /**
     * 对控件进行适配
     * @param view
     */
    private static void catchChildView(View view) {
        if (view instanceof ViewGroup) {
            catchViewGroup((ViewGroup) view);
        } else {
            ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) view.getLayoutParams();

            //设置LayoutParams
            ViewCalculateUtil.setLayoutParams(view, layoutParams.width, layoutParams.height, layoutParams.topMargin, layoutParams.bottomMargin,
                    layoutParams.leftMargin, layoutParams.rightMargin);
            if (view instanceof TextView) {//如果是textview，设配字体大小
                TextView textView = (TextView) view;
                ViewCalculateUtil.setTextSize(textView, (int) textView.getTextSize());
            }
            //设置padding
            ViewCalculateUtil.setViewPadding(view, view.getPaddingTop(), view.getPaddingBottom(), view.getPaddingLeft(), view.getPaddingRight());
        }
    }

}

UIUtils.getInstance().init(getApplicationContext());

UIUtils.getInstance().registerActivity(this);