Android屏幕100%适配方案

一、创建一个UiUtils工具类，用于计算控件的缩放比例

计算设备实际高度

  //基准宽高    private final static int STANDARD_WIDTH = 1080;    private final static int STANDARD_HEIGHT = 1920 - 48;    //实际设备分辨率    private float displayMetricsWidth;    private float displayMetricsHeight;    private UIUtil(Context context)    {        mContext = context;        WindowManager windowManager = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);        DisplayMetrics displayMetrics = new DisplayMetrics();        if (displayMetricsWidth == 0.0F || displayMetricsHeight == 0.0F) {            windowManager.getDefaultDisplay().getMetrics(displayMetrics);            //获取            int systemBarHight = getSystemBarHeight();            //处理真实宽高得问题            if (displayMetrics.widthPixels > displayMetrics.heightPixels) {//横屏                this.displayMetricsWidth = (float) displayMetrics.heightPixels;                this.displayMetricsHeight = (float) displayMetrics.widthPixels - systemBarHight;            } else {//竖屏                this.displayMetricsWidth = (float) displayMetrics.widthPixels;                this.displayMetricsHeight = (float) displayMetrics.heightPixels - systemBarHight;            }        }    }

获取状态框的高度的两个方法

方法1、通过反射获得

private static String DIME_CLAZZ = "com.android.internal.R$dimen"; private int getSystemBarHeight()    {        return getValue(mContext,DIME_CLAZZ,"system_bar_height",48);    }private int getValue(Context context, String attrGroupClass,String attrName,int defValue)    {        try{            Class clz = Class.forName(attrGroupClass);            Object obj = clz.newInstance();            Field field = clz.getField(attrName);            int id = Integer.parseInt(field.get(obj).toString());            return context.getResources().getDimensionPixelSize(id);        }catch(Exception e){            return defValue;        }    }

方法2 通过系统给我们提供了一个Resource类

public int getStatusBarHeight() {  int result = 0;  int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");  if (resourceId > 0) {      result = getResources().getDimensionPixelSize(resourceId);  }  return result;}

计算宽高缩放比例

public float getHorizontalScaleValue()    {        return this.displayMetricsWidth / (float) STANDARD_WIDTH;    }    public float getVerticalScaleValue()    {        return this.displayMetricsHeight / (float) STANDARD_HEIGHT;    }

二、创建自定义Layout extern RelativeLayout

在自定义布局onMeasure方法中，对子控件的按照缩放比例进行重新计算。

@Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        if(!isMeasure) {            isMeasure = true;            int childCount = this.getChildCount();            float scaleX = UIUtil.getInstance(getContext()).getHorizontalScaleValue();            float scaleY = UIUtil.getInstance(getContext()).getVerticalScaleValue();            for (int i = 0; i < childCount; i++) {                View child = this.getChildAt(i);                LayoutParams layoutParams = (LayoutParams) child.getLayoutParams();                layoutParams.width = (int) (layoutParams.width * scaleX);                layoutParams.height = (int) (layoutParams.height * scaleY);                layoutParams.leftMargin = (int) (layoutParams.leftMargin * scaleX);                layoutParams.rightMargin = (int) (layoutParams.rightMargin * scaleX);                layoutParams.topMargin = (int) (layoutParams.topMargin * scaleY);                layoutParams.bottomMargin = (int) (layoutParams.bottomMargin * scaleY);                child.setPadding((int)(child.getPaddingLeft()* scaleX),(int)(child.getPaddingTop()* scaleY),(int)(child.getRight()* scaleX),(int)(getPaddingBottom()* scaleY));            }        }        super.onMeasure(widthMeasureSpec, heightMeasureSpec);    }

Android屏幕100%适配方案

Android屏幕100%适配方案

一、创建一个UiUtils工具类，用于计算控件的缩放比例

二、创建自定义Layout extern RelativeLayout

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