58 lines
2.2 KiB
Java
58 lines
2.2 KiB
Java
package com.github.dfa.diaspora_android.util;
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import android.app.Activity;
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import android.graphics.Rect;
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import android.view.View;
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import android.view.ViewTreeObserver;
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import android.widget.FrameLayout;
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// From https://stackoverflow.com/a/19494006
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public class AndroidBug5497Workaround {
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// For more information, see https://code.google.com/p/android/issues/detail?id=5497
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// To use this class, simply invoke assistActivity() on an Activity that already has its content view set.
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public static void assistActivity(Activity activity) {
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new AndroidBug5497Workaround(activity);
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}
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private View mChildOfContent;
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private int usableHeightPrevious;
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private FrameLayout.LayoutParams frameLayoutParams;
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private AndroidBug5497Workaround(Activity activity) {
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FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
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mChildOfContent = content.getChildAt(0);
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mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
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public void onGlobalLayout() {
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possiblyResizeChildOfContent();
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}
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});
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frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
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}
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private void possiblyResizeChildOfContent() {
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int usableHeightNow = computeUsableHeight();
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if (usableHeightNow != usableHeightPrevious) {
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int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
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int heightDifference = usableHeightSansKeyboard - usableHeightNow;
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if (heightDifference > (usableHeightSansKeyboard / 4)) {
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// keyboard probably just became visible
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frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
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} else {
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// keyboard probably just became hidden
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frameLayoutParams.height = usableHeightSansKeyboard;
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}
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mChildOfContent.requestLayout();
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usableHeightPrevious = usableHeightNow;
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}
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}
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private int computeUsableHeight() {
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Rect r = new Rect();
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mChildOfContent.getWindowVisibleDisplayFrame(r);
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return (r.bottom - r.top);
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}
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} |