package com.looklook.xinghongfei.looklook.util;
import android.app.Activity;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.util.Pair;
import android.view.View;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* Created by xinghongfei on 16/8/16.
*/
public class Help {
public static Pair<View, String>[] createSafeTransitionParticipants(@NonNull Activity activity,
boolean includeStatusBar, @Nullable Pair... otherParticipants) {
// Avoid system UI glitches as described here:
// https://plus.google.com/+AlexLockwood/posts/RPtwZ5nNebb
View decor = activity.getWindow().getDecorView();
View statusBar = null;
if (includeStatusBar) {
statusBar = decor.findViewById(android.R.id.statusBarBackground);
}
View navBar = decor.findViewById(android.R.id.navigationBarBackground);
// Create pair of transition participants.
List<Pair> participants = new ArrayList<>(3);
addNonNullViewToTransitionParticipants(statusBar, participants);
addNonNullViewToTransitionParticipants(navBar, participants);
// only add transition participants if there's at least one none-null element
if (otherParticipants != null && !(otherParticipants.length == 1
&& otherParticipants[0] == null)) {
participants.addAll(Arrays.asList(otherParticipants));
}
return participants.toArray(new Pair[participants.size()]);
}
private static void addNonNullViewToTransitionParticipants(View view, List<Pair> participants) {
if (view == null) {
return;
}
participants.add(new Pair<>(view, view.getTransitionName()));
}
}