Android全屏时软键盘遮住输入框修改布局解决方案

一般 *android:windowSoftInputMode="adjustResize" *就能解决软键盘遮住输入框的问题，但是当Activity设为Full Screen这个设置就无效了。
下面这个类就能解决这个问题：

public class AndroidBugWorkaround {    // 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 (Activity activity) {        new AndroidBugWorkaround(activity);    }        private View mChildOfContent;    private int usableHeightPrevious;    private FrameLayout.LayoutParams frameLayoutParams;        private AndroidBugWorkaround(Activity activity) {        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);        mChildOfContent = content.getChildAt(0);        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {                public void onGlobalLayout() {                        possiblyResizeChildOfContent();                }        });        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();    }    private void possiblyResizeChildOfContent() {        int usableHeightNow = computeUsableHeight();        if (usableHeightNow != usableHeightPrevious) {            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();            int heightDifference = usableHeightSansKeyboard - usableHeightNow;            if (heightDifference > (usableHeightSansKeyboard/4)) {                // keyboard probably just became visible                frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;            } else {                // keyboard probably just became hidden                frameLayoutParams.height = usableHeightSansKeyboard;            }            mChildOfContent.requestLayout();            usableHeightPrevious = usableHeightNow;        }    }    private int computeUsableHeight() {        Rect r = new Rect();        mChildOfContent.getWindowVisibleDisplayFrame(r);        return r.bottom;    }}

只需要在Activity中的 onCreate() 方法中 setContentView() 后面添加
AndroidBugWorkaround.assistActivity(this);即可。

备注：computeUsableHeight() 方法返回值根据fitSystemWindows的设置值来决定，如果布局中fitsSystemWindows="false", return r.bottom; 如果fitsSystemWindows="true", return (r.bottom - r.top);

参考链接

备注：computeUsableHeight() 方法返回值根据fitSystemWindows的设置值来决定，如果布局中fitsSystemWindows="false", return r.bottom; 如果fitsSystemWindows="true", return (r.bottom - r.top);

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