软键盘挡住WebView中输入框解决方法

如果是EditText，弹出软键盘好处理，会自动把输入框顶上来。

但如果输入框实在WebView中，那就不好处理了。

什么设置android:windowSoftInputMode属性啊，什么套一层ScrollView布局之类的都无效，最后再这里找到了终极解决方法，测试过有效。

附上链接：/p/306482e17080，感谢博主分享。

里面已经描述听详细的了，这里我也把该方法记录下来。

其实这是Android本身的一个issue 5497的bug。

解决方法有两种：

一、不用全屏模式，包含WebView的Activity使用了全屏模式，比如说没有标题栏之类的，就会出现这种遮挡的问题，如果可以的话去掉全屏就没问题了。

二、一定要全屏的Activity，那么也很简单，借助一个填坑类就可以了：

1、填坑的类AndroidBug5497Workaround：

import android.app.Activity;

import android.graphics.Rect;

import android.view.View;

import android.view.ViewTreeObserver;

import android.widget.FrameLayout;

/**

* 解决WebView中输入时弹出软键盘，挡住输入框的问题

* copy from /p/306482e17080

* Created by ldw on /5/23.

*/

public class AndroidBug5497Workaround {

// For more information, see /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(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

}

}

2、Activity中使用也很简单：

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practise);

AndroidBug5497Workaround.assistActivity(this);

}

两种方法都很简单，结果也不再挡住输入框了。

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