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Bug 863803 - Part 1: Prevent multiple AboutHome fragments from being created after restore. r=lucasr

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This commit is contained in:
Brian Nicholson 2013-04-24 11:03:51 -07:00
parent 7920acf29c
commit 1e32a2673a
1 changed files with 17 additions and 8 deletions
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25
mobile/android/base/BrowserApp.java
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@ -123,6 +123,10 @@ abstract public class BrowserApp extends GeckoApp
private Integer mPrefObserverId;
// Tag for the AboutHome fragment. The fragment is automatically attached
// after restoring from a saved state, so we use this tag to identify it.
private static final String ABOUTHOME_TAG = "abouthome";
@Override
public void onTabChanged(Tab tab, Tabs.TabEvents msg, Object data) {
switch(msg) {
@ -358,13 +362,18 @@ abstract public class BrowserApp extends GeckoApp
}
});
// AboutHome will be dynamically attached and detached as
// about:home is shown. Adding/removing the fragment is not synchronous,
// so we can't use Fragment#isVisible() to determine whether the
// about:home is shown. Instead, we use Fragment#getUserVisibleHint()
// with the hint we set ourselves.
mAboutHome = AboutHome.newInstance();
mAboutHome.setUserVisibleHint(false);
// Find the Fragment if it was already added from a restored instance state.
mAboutHome = (AboutHome) getSupportFragmentManager().findFragmentByTag(ABOUTHOME_TAG);
if (mAboutHome == null) {
// AboutHome will be dynamically attached and detached as
// about:home is shown. Adding/removing the fragment is not synchronous,
// so we can't use Fragment#isVisible() to determine whether the
// about:home is shown. Instead, we use Fragment#getUserVisibleHint()
// with the hint we set ourselves.
mAboutHome = AboutHome.newInstance();
mAboutHome.setUserVisibleHint(false);
}
mBrowserToolbar = new BrowserToolbar(this);
mBrowserToolbar.from(actionBar);
@ -1092,7 +1101,7 @@ abstract public class BrowserApp extends GeckoApp
// it can't be used between the Activity's onSaveInstanceState() and
// onResume().
getSupportFragmentManager().beginTransaction()
.add(R.id.gecko_layout, mAboutHome).commitAllowingStateLoss();
.add(R.id.gecko_layout, mAboutHome, ABOUTHOME_TAG).commitAllowingStateLoss();
mAboutHome.setUserVisibleHint(true);
mBrowserToolbar.setNextFocusDownId(R.id.abouthome_content);