安卓全屏模式下键盘遮挡底部输入框

最新推荐文章于 2021-05-29 23:51:56 发布

ForMuHan

最新推荐文章于 2021-05-29 23:51:56 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/ForMuHan/article/details/106538851

本文介绍了一个解决Android应用中键盘弹出时遮挡输入框的问题，通过自定义类AndroidBug5497Workaround调整布局高度，确保输入框始终可见。此解决方案适用于设置了windowSoftInputMode=adjustResize的场景。

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废话不多说，直接上图显示bug,设置键盘属性windowSoftInputMode="adjustResize"时，底部的输入框光标以下部分被遮挡了。

查了很多资料，有说必须使用RelativeLayout的等等说法。一行行代码注释后发现是因为全屏的问题。找到问题就好解决了，贴出大神代码，侵删

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(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);
    }

}

备注：必须在onCreate()/onCreateView()设置过布局之后调用AndroidBug5497Workaround.assistActivity(this)；否则会报空指针