最近在项目中遇到使用ReletiveLayout将View固定在底部，但弹出输入框时底部的View被顶上去的问题， 尝试了很多解决办法 ，如下：

方法一：在你的activity中的oncreate中setContentView之前写上这个代码getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);

方法二：在项目的AndroidManifest.xml文件中界面对应的里加入android:windowSoftInputMode="stateVisible|adjustResize"，这样会让屏幕整体上移。如果加上的是

android:windowSoftInputMode="adjustPan"这样键盘就会覆盖屏幕。

方法三：把顶级的layout替换成ScrollView，或者说在顶级的Layout上面再加一层ScrollView的封装。这样就会把软键盘和输入框一起滚动了，软键盘会一直处于底部。

方法四：更换根布局

方法五：在根布局下加上fitsSystemwindows = true

尝试后发现：

方法一无效(ReletiveLayout下设置属性无效)

方法二无效(ReletiveLayout下设置属性无效)

方法三有效，但不适合 (布局没有超过屏幕，使用ScroollView使得View都挨在一起，只能通过magin值控制距离，不准确)

方法四无效

方法五无效

试过这么多都没用，真没办法了，最后只能监听软键盘的显示和隐藏来控制 底部布局的显隐，这样可以解决问题，不过有点闪动，问题不是很大。

照搬的代码，监听代码如下 ：

public class KeyboardStateObserver {

private static final String TAG = KeyboardStateObserver.class.getSimpleName();

public static KeyboardStateObserver getKeyboardStateObserver(Activity activity) {

return new KeyboardStateObserver(activity);

}

private View mChildOfContent;

private int usableHeightPrevious;

private OnKeyboardVisibilityListener listener;

public void setKeyboardVisibilityListener(OnKeyboardVisibilityListener listener) {

this.listener = listener;

}

private KeyboardStateObserver(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();

}

});

}

private void possiblyResizeChildOfContent() {

int usableHeightNow = computeUsableHeight();

if (usableHeightNow != usableHeightPrevious) {

int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();

int heightDifference = usableHeightSansKeyboard - usableHeightNow;

if (heightDifference > (usableHeightSansKeyboard / 4)) {

if (listener != null) {

listener.onKeyboardShow();

}

} else {

if (listener != null) {

listener.onKeyboardHide();

}

}

usableHeightPrevious = usableHeightNow;

Log.d(TAG,"usableHeightNow: " + usableHeightNow + " | usableHeightSansKeyboard:" + usableHeightSansKeyboard + " | heightDifference:" + heightDifference);

}

}

private int computeUsableHeight() {

Rect r = new Rect();

mChildOfContent.getWindowVisibleDisplayFrame(r);

Log.d(TAG,"rec bottom>" + r.bottom + " | rec top>" + r.top);

return (r.bottom - r.top);// 全屏模式下： return r.bottom

}

public interface OnKeyboardVisibilityListener {

void onKeyboardShow();

void onKeyboardHide();

}

}

在界面中使用：

KeyboardStateObserver.getKeyboardStateObserver(this).

setKeyboardVisibilityListener(new KeyboardStateObserver.OnKeyboardVisibilityListener() {

@Override

public void onKeyboardShow() {

Toast.makeText(MainActivity.this,"键盘弹出",Toast.LENGTH_SHORT).show();

}

@Override

public void onKeyboardHide() {

Toast.makeText(MainActivity.this,"键盘收回",Toast.LENGTH_SHORT).show();

}

});