主要解决的问题：
页面布局中使用了scrollview，也有输入框，当比较靠底的输入框获取焦点后，输入框会被键盘遮住，无法滑动看到被键盘遮住的输入框，使用以下代码，可解决此问题
注意：不需要在manifest文件中设置activity的windowSoftInputMode属性，只需使用下面这一句话就可搞定
调用部分：
SoftKeyInputHidWidget.assistActivity(this);//修复键盘遮挡问题，必须放在setconentView()后面
核心代码（SoftKeyInputHidWidget）：
public class SoftKeyInputHidWidget {
/**
* 用于解决因为沉浸式状态栏，但不想采用fitSystemWidnow属性
* 或不想设置键盘属adjustResize/adjustPan属性，想实现键盘不遮挡输入框
* 相关说明：https://blog.csdn.net/smileiam/article/details/69055963
* Created by SmileXie on 2017/3/27.
*/
private ViewmChildOfContent;
private int usableHeightPrevious;
private FrameLayout.LayoutParamsframeLayoutParams;
private int contentHeight;
private boolean isfirst =true;
private int statusBarHeight;
public static void assistActivity(Activity activity) {
new SoftKeyInputHidWidget(activity);
}
private SoftKeyInputHidWidget(Activity activity) {
statusBarHeight =getStatusBarHeight(activity);
FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
mChildOfContent = content.getChildAt(0);
//界面出现变动都会调用这个监听事件
mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
if (isfirst) {
contentHeight =mChildOfContent.getHeight();//兼容华为等机型
isfirst =false;
}
possiblyResizeChildOfContent();
}
});
frameLayoutParams = (FrameLayout.LayoutParams)mChildOfContent.getLayoutParams();
}
//重新调整跟布局的高度
private void possiblyResizeChildOfContent() {
int usableHeightNow = computeUsableHeight();
//当前可见高度和上一次可见高度不一致 布局变动
if (usableHeightNow !=usableHeightPrevious) {
int usableHeightSansKeyboard =mChildOfContent.getRootView().getHeight();
int heightDifference = usableHeightSansKeyboard - usableHeightNow;
if (heightDifference > (usableHeightSansKeyboard /4)) {
// keyboard probably just became visible
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
frameLayoutParams.height = usableHeightSansKeyboard - heightDifference +statusBarHeight;
}else {
frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
}
}else {
frameLayoutParams.height =contentHeight;
}
mChildOfContent.requestLayout();
usableHeightPrevious = usableHeightNow;
}
}
/**
* 获取改变之后界面的可用高度（可以为开发者显示内容的高度）
*
* @return
*/
private int computeUsableHeight() {
Rect r =new Rect();
mChildOfContent.getWindowVisibleDisplayFrame(r);//获取到的rect就是界面除去标题栏、除去软键盘挡住部分，所剩下的域
return (r.bottom - r.top);
}
public static int getStatusBarHeight(Activity activity) {
//获取状态栏的高度
int resourceId = activity.getResources().getIdentifier("status_bar_height","dimen","android");
return activity.getResources().getDimensionPixelSize(resourceId);
}
}
补充说明：
activity的xml布局格式：
具体原理解释请看这位博主的详细讲解：
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