android 关于软键盘遮挡webView底部输入框问题(解决方案)
程序员文章站
2022-05-30 11:54:04
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软键盘挡住了输入框这个坑 填坑方法:来吧,小伙伴们 keyboarder,多亏我的名字了
为什么说它是个坑?"issue 5497"
上面表格的这种情况并非是Google所期望的,理想的情况当然是它们都能正常生效才对——所以这其实是Android系统本身的一个BUG。
为什么文章开头说这是个坑呢?
——因为这个BUG从Android1.x时代(2009年)就被报告了,而一直到了如今的Android7.0(2016年)还是没有修复……/(ㄒoㄒ)/
可以说这不仅是个坑,而且还是个官方挖的坑~
"issue 5497",详情传送门 ☞ Issue 5497 - android -WebView adjustResize windowSoftInputMode breaks when activity is fullscreen - Android Open Source Project - Issue Tracker - Google Project Hosting
当然了,不管坑是谁挖的,最终还是要开发者来解决。
遇到坑之后,有两种方法可以过去:躲,或者填。
public static void assistActivity(Activity activity) {
new AndroidBug5497Workaround(activity);
}
private View mChildOfContent;
private int usableHeightPrevious;
private FrameLayout.LayoutParams frameLayoutParams;
private AndroidBug5497Workaround(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 - r.top);// 全屏模式下: return r.bottom
}
AndroidBug5497Workaround.assistActivity(this);