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Wifi details: minor ordering fixes.

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1. Set mNetwork before the NetworkCallbacks can be delivered.
   Previously, the code would set mNetwork in updateInfo, relying
   on the fact that the BroadcastReceiver registered in onResume
   is immediately invoked. However, this races with the
   callbacks, which are also immediately invoked. If the
   callbacks won the race, mNetwork would not be set and they
   would be ignored.

2. Call updateInfo in onResume instead of in displayPreference.
   This ensures that it's always called exactly once before the
   activity starts running, regardless of whether it's being
   displayed the first time (i.e., after onStart) or resumed
   by switching from another app. displayPreference is only
   called in the former case.

3. Don't call getLinkProperties and getNetworkCapabilities in
   updateInfo. These calls are superfluous, because this
   information is update by the NetworkCallbacks, and they can
   cause jank because updateInfo is called on the UI thread.

This requires that the tests be changed so they always call
onResume, since no UI elements are populated until onResume is
called.

Bug: 62209358
Test: make -j64 RunSettingsRoboTests
Change-Id: Iccb1b9ae51188755d890a6df83004dbe9bec565e
This commit is contained in:
Lorenzo Colitti
2017-06-04 23:15:40 +09:00
parent 2561df8083
commit 088215d877
2 changed files with 48 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/com/android/settings/wifi/details/WifiDetailPreferenceController.java
View File

@@ -269,16 +269,19 @@ public class WifiDetailPreferenceController extends PreferenceController impleme
mForgetButton = (Button) mButtonsPref.findViewById(R.id.forget_button);
mForgetButton.setText(R.string.forget);
mForgetButton.setOnClickListener(view -> forgetNetwork());
updateInfo();
}
@Override
public void onResume() {
// Ensure mNetwork is set before any callbacks above are delivered, since our
// NetworkCallback only looks at changes to mNetwork.
mNetwork = mWifiManager.getCurrentNetwork();
mLinkProperties = mConnectivityManager.getLinkProperties(mNetwork);
mNetworkCapabilities = mConnectivityManager.getNetworkCapabilities(mNetwork);
updateInfo();
mContext.registerReceiver(mReceiver, mFilter);
mConnectivityManagerWrapper.registerNetworkCallback(mNetworkRequest, mNetworkCallback,
mHandler);
// updateInfo() will be called during registration because NETWORK_STATE_CHANGED_ACTION is
// a sticky broadcast.
mContext.registerReceiver(mReceiver, mFilter);
}
@Override
@@ -293,9 +296,8 @@ public class WifiDetailPreferenceController extends PreferenceController impleme
}
private void updateInfo() {
mNetwork = mWifiManager.getCurrentNetwork();
mLinkProperties = mConnectivityManager.getLinkProperties(mNetwork);
mNetworkCapabilities = mConnectivityManager.getNetworkCapabilities(mNetwork);
// No need to fetch LinkProperties and NetworkCapabilities, they are updated by the
// callbacks. mNetwork doesn't change except in onResume.
mNetworkInfo = mConnectivityManager.getNetworkInfo(mNetwork);
mWifiInfo = mWifiManager.getConnectionInfo();
if (mNetwork == null || mNetworkInfo == null || mWifiInfo == null) {