最近把Android应用的一些组件替换掉，发现虚拟按键会遮挡布局。查了一下，发现是页面布局的可用高度不是视图的实际高度，只需要把页面布局的高度重新设置即可。
原文：Android虚拟按键遮挡布局【完美解决方案】
/*** Created by : vince* Created at : /12/20* Desc : 解决虚拟按键遮挡页面布局问题* Usage : 在需要重新布局的Activity的onCreate方法关联视图：AndroidVirtualKey.assistActivity(findViewById(android.R.id.xxx), this)*/import android.app.Activity;import android.content.Context;import android.util.DisplayMetrics;import android.view.Display;import android.view.View;import android.view.ViewGroup;import android.view.ViewTreeObserver;import android.view.WindowManager;import java.lang.reflect.Method;public class AndroidVirtualKey {private View mViewObserved;//被监听的视图private int usableHeightPrevious;//视图变化前的可用高度private ViewGroup.LayoutParams frameLayoutParams;private AndroidVirtualKey(View viewObserving, final Activity activity) {mViewObserved = viewObserving;//给View添加全局的布局监听器mViewObserved.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {public void onGlobalLayout() {resetLayoutByUsableHeight(activity);}});frameLayoutParams = mViewObserved.getLayoutParams();}/*** 关联要监听的视图*/public static void assistActivity(View viewObserving, Activity activity) {new AndroidVirtualKey(viewObserving, activity);}/*** 重新设置页面布局* @param activity*/private void resetLayoutByUsableHeight(Activity activity) {WindowManager wm = (WindowManager) activity.getSystemService(Context.WINDOW_SERVICE);//得到wm所管理屏幕（Display）的分辨率int width = wm.getDefaultDisplay().getWidth();int height = wm.getDefaultDisplay().getHeight();int usableHeightNow = height;/*** 比较布局变化前后的View的可用高度，如果两次高度不一致* 将当前的View的可用高度设置成View的实际高度；如一致* 则无需改变*/if (usableHeightNow != usableHeightPrevious) {mViewObserved.setPadding(0, 0, 0, getHasVirtualKey(activity)); //改变内边距padding-bottommViewObserved.requestLayout();//请求重新布局usableHeightPrevious = usableHeightNow;}}/*** dpi 通过反射，获取包含虚拟键的整体屏幕高度* height 获取屏幕尺寸，但是不包括虚拟功能高度** @return*/public static int getHasVirtualKey(Activity activity) {int dpi = 0;Display display = activity.getWindowManager().getDefaultDisplay(); //得到屏幕DisplayMetrics dm = new DisplayMetrics();@SuppressWarnings("rawtypes")Class c;try {c = Class.forName("android.view.Display");@SuppressWarnings("unchecked")Method method = c.getMethod("getRealMetrics", DisplayMetrics.class);method.invoke(display, dm);dpi = dm.heightPixels;} catch (Exception e) {e.printStackTrace();}int height = activity.getWindowManager().getDefaultDisplay().getHeight();return dpi - height;}}
