先上最终的代码：

public class AndroidWorkaround {public static void assistActivity(View content) {new AndroidWorkaround(content);}private View mChildOfContent;private int usableHeightPrevious;private ViewGroup.LayoutParams frameLayoutParams;private AndroidWorkaround(View content) {mChildOfContent = content;mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {public void onGlobalLayout() {possiblyResizeChildOfContent();}});frameLayoutParams = mChildOfContent.getLayoutParams();}private void possiblyResizeChildOfContent() {int usableHeightNow = computeUsableHeight();if (usableHeightNow != usableHeightPrevious) {frameLayoutParams.height = usableHeightNow;mChildOfContent.requestLayout();usableHeightPrevious = usableHeightNow;}}private int computeUsableHeight() {Rect r = new Rect();mChildOfContent.getWindowVisibleDisplayFrame(r);return (r.bottom);}public static boolean checkDeviceHasNavigationBar(Context context) {boolean hasNavigationBar = false;Resources rs = context.getResources();int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");if (id > 0) {hasNavigationBar = rs.getBoolean(id);}try {Class systemPropertiesClass = Class.forName("android.os.SystemProperties");Method m = systemPropertiesClass.getMethod("get", String.class);String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");if ("1".equals(navBarOverride)) {hasNavigationBar = false;} else if ("0".equals(navBarOverride)) {hasNavigationBar = true;}} catch (Exception e) {}return hasNavigationBar;}}

注意点：这里构造方法的参数是当前你写的布局view

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PS：

1.单单解决输入法挡住软键盘

public class AndroidBug5497Workaround {// 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 AndroidBug5497Workaround(activity);}private Activity activity;private View mChildOfContent;private int usableHeightPrevious;private FrameLayout.LayoutParams frameLayoutParams;private AndroidBug5497Workaround(Activity activity) {this.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();//这个判断是为了解决19之前的版本不支持沉浸式状态栏导致布局显示不完全的问题
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {Rect frame = new Rect();activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);int statusBarHeight = frame.top;usableHeightSansKeyboard -= statusBarHeight;}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 frame = new Rect();activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);int statusBarHeight = frame.top;Rect r = new Rect();mChildOfContent.getWindowVisibleDisplayFrame(r);//这个判断是为了解决19之后的版本在弹出软键盘时，键盘和推上去的布局（adjustResize）之间有黑色区域的问题
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {return (r.bottom - r.top) + statusBarHeight;}return (r.bottom - r.top);}}
2.单单解决华为手机虚拟按键挡住底部界面

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.

    /**
     * 关联要监听的视图
     *
     * @param viewObserving
     */
    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;}}/**
     * 计算视图可视高度
     *
     * @return
     */
    private int computeUsableHeight() {Rect r = new Rect();mViewObserved.getWindowVisibleDisplayFrame(r);return (r.bottom - r.top);}
}
注意点：setContentView(R.layout.content_frame); 
AndroidBug54971Workaround.assistActivity(findViewById(android.R.id.content));