版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/u010648159/article/details/83546055
最近项目中用到了webview,然后里面有输入框,当我们点击输入框的时候,软键盘挡住了布局,这就尴尬了,并且产品说,只有在软键盘弹出的时候底部的虚拟导航栏为黑色,软键盘隐藏的时候虚拟导航栏应该也隐藏。网上搜了很多资料和博客,最终把几篇有价值的贴上,并且附上源码。
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 View mChildOfContent;
private int usableHeightPrevious;
private FrameLayout.LayoutParams frameLayoutParams;
private AndroidBug5497Workaround(final Activity activity) {
FrameLayout content = activity.findViewById(android.R.id.content);
mChildOfContent = content.getChildAt(0);
mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
possiblyResizeChildOfContent(activity);
}
});
frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
}
private void possiblyResizeChildOfContent(Activity activity) {
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;
PhoneUtils.setBottomNavigationColor(activity);
} else {
// keyboard probably just became hidden
frameLayoutParams.height = usableHeightSansKeyboard;
PhoneUtils.hideVirtualNavigation(activity);
}
mChildOfContent.requestLayout();
usableHeightPrevious = usableHeightNow;
}
}
private int computeUsableHeight() {
Rect r = new Rect();
mChildOfContent.getWindowVisibleDisplayFrame(r);
return (r.bottom - r.top);// 全屏模式下: return r.bottom
}
}
public class PhoneUtils {
/***
* 显示底部虚拟按键的颜色
*
* @param activity
*/
public static void setBottomNavigationColor(Activity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Window window = activity.getWindow();
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.setNavigationBarColor(Color.BLACK);
}
}
/***
* 隐藏虚拟按键
*
* @param activity
*/
public static void hideVirtualNavigation(Activity activity) {
if (hasNavBar(activity.getApplicationContext())) {
hideBottomUIMenu(activity);
}
}
/**
* 隐藏虚拟按键,并且全屏
*/
private static void hideBottomUIMenu(Activity activity) {
// 隐藏虚拟按键,并且全屏
if (Build.VERSION.SDK_INT > 11 && Build.VERSION.SDK_INT < 19) { // lower api
View v = activity.getWindow().getDecorView();
v.setSystemUiVisibility(View.GONE);
} else if (Build.VERSION.SDK_INT >= 19) {
// for new api versions.
View decorView = activity.getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE;
decorView.setSystemUiVisibility(uiOptions);
activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
}
}
/**
* 检查是否存在虚拟按键栏
*
* @param context
* @return
*/
private static boolean hasNavBar(Context context) {
Resources res = context.getResources();
int resourceId = res.getIdentifier("config_showNavigationBar", "bool", "android");
if (resourceId != 0) {
boolean hasNav = res.getBoolean(resourceId);
// check override flag
String sNavBarOverride = getNavBarOverride();
if ("1".equals(sNavBarOverride)) {
hasNav = false;
} else if ("0".equals(sNavBarOverride)) {
hasNav = true;
}
return hasNav;
} else { // fallback
return !ViewConfiguration.get(context).hasPermanentMenuKey();
}
}
/**
* 判断虚拟按键栏是否重写
*
* @return
*/
private static String getNavBarOverride() {
String sNavBarOverride = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
try {
Class c = Class.forName("android.os.SystemProperties");
Method m = c.getDeclaredMethod("get", String.class);
m.setAccessible(true);
sNavBarOverride = (String) m.invoke(null, "qemu.hw.mainkeys");
} catch (Throwable e) {
}
}
return sNavBarOverride;
}
}
thanks
webview 软键盘挡住问题
虚拟按键修改颜色
隐藏虚拟按键