Android适配底部虚拟键盘遮挡布局的解决方案

public class AndroidBug54971Workaround {    // For more information, see https://code.google.com/p/android/issues/detail?id=5497    // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.    public static void assistActivity(View viewObserving) {        new AndroidBug54971Workaround(viewObserving);    }    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 AndroidBug54971Workaround(View viewObserving) {        mViewObserved = viewObserving;        //给View添加全局的布局监听器        mViewObserved.getViewTreeObserver().addOnGlobalLayoutListener(new         ViewTreeObserver.OnGlobalLayoutListener() {            public void onGlobalLayout() {                resetLayoutByUsableHeight(computeUsableHeight());            }        });        frameLayoutParams = mViewObserved.getLayoutParams();    }    private void resetLayoutByUsableHeight(int usableHeightNow) {        //比较布局变化前后的View的可用高度        if (usableHeightNow != usableHeightPrevious) {            //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            frameLayoutParams.height = usableHeightNow;            mViewObserved.requestLayout();//请求重新布局            usableHeightPrevious = usableHeightNow;        }    }    private int computeUsableHeight() {        Rect r = new Rect();        mViewObserved.getWindowVisibleDisplayFrame(r);        return (r.bottom - r.top);    }}

使用：

//setContentView之后AndroidBug54971Workaround.assistActivity(findViewById(android.R.id.content));

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