Slide 1
Slide 1 text
HOW TO LOVE YOUR
DEVELOPERS LIKE YOUR
CUSTOMERS?
Ishan Khanna
Android @ Booking
#droidkaigi @droidchef
Slide 2
Slide 2 text
OUTLINE
1. INSPIRATION FOR THE TALK
2. DEBUG FEATURES
3. COMMON SCENARIOS
4. LEVERAGING THE POWER OF OPEN SOURCE
5. A COOL DEBUGGING TRICK
#droidkaigi @droidchef
Slide 3
Slide 3 text
INSPIRATION
FOR THE TALK
#droidkaigi @droidchef
Slide 4
Slide 4 text
“DEBUG FEATURES”
WHAT ARE THEY?
#droidkaigi @droidchef
Slide 5
Slide 5 text
WHO ARE THEY FOR?
DEVELOPERS
QUALITY
ASSURANCE
TESTERS
PRODUCT
OWNERS
DESIGNERS
Slide 6
Slide 6 text
SCENARIO 1
THE SERVER URLs
#droidkaigi @droidchef
Slide 7
Slide 7 text
PROD DEV-1 DEV-2 DEV-3 DEV-4
ANDROID APP
Slide 8
Slide 8 text
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https://dev-2.booking.com/")
.build();
Slide 9
Slide 9 text
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https://dev-2.booking.com/")
.build();
Slide 10
Slide 10 text
PROD DEV-1 DEV-2 DEV-3 DEV-4
ANDROID APP
Slide 11
Slide 11 text
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https://dev-3.booking.com/")
.build();
Slide 12
Slide 12 text
No content
Slide 13
Slide 13 text
SCENARIO 2
THE COPIES
#droidkaigi @droidchef
Slide 14
Slide 14 text
SEARCH RESULTS IN ENGLISH
Slide 15
Slide 15 text
SEARCH RESULTS IN JAPANESE
Slide 16
Slide 16 text
SIDE BY SIDE COMPARISON
Slide 17
Slide 17 text
No content
Slide 18
Slide 18 text
SCENARIO 3
NETWORK THROTTLING
#droidkaigi @droidchef
Slide 19
Slide 19 text
public class NetworkThrottlingInterceptor implements Interceptor {
private static final AtomicLong failRequestCount = new
AtomicLong(Long.MAX_VALUE);
private static boolean delayAllRequests = false;
private static long minRequestDelay = 0;
private static long maxRequestDelay = 0;
private final Random random = new Random(4);
Slide 20
Slide 20 text
public Response intercept(Chain chain) throws IOException {
long delay = minRequestDelay;
if( minRequestDelay != maxRequestDelay ) {
delay = (long) ((random.nextDouble() * (maxRequestDelay -
minRequestDelay)) + minRequestDelay);
}
long end = System.currentTimeMillis() + delay;
long now = System.currentTimeMillis();
while( now < end ) {
try {
Thread.sleep( end - now);
} catch (InterruptedException e) {
// Nothing to do here, timing controlled by outer loop.
}
now = System.currentTimeMillis();
}
return chain.proceed(chain.request());
}
Slide 21
Slide 21 text
public static void delayAllRequests( long minRequestDelay, long maxRequestDelay ) {
if( minRequestDelay == 0 && maxRequestDelay == 0 ) {
delayAllRequests = false;
} else {
NetworkThrottlingInterceptor.minRequestDelay = minRequestDelay;
NetworkThrottlingInterceptor.maxRequestDelay = maxRequestDelay;
delayAllRequests = true;
}
}
Slide 22
Slide 22 text
public OkHttpClient configure(@NonNull OkHttpClient client) {
client = super.configure(client);
return client.newBuilder()
.addNetworkInterceptor(new NetworkThrottlingInterceptor())
.addInterceptor(new SomeOtherInterceptor())
.build();
}
Slide 23
Slide 23 text
SCENARIO 4
UNAVAILABLE PLAY SERVICES
#droidkaigi @droidchef
Slide 24
Slide 24 text
No content
Slide 25
Slide 25 text
No content
Slide 26
Slide 26 text
SCENARIO 5
DEBUG NOTIFICATIONS
#droidkaigi @droidchef
Slide 27
Slide 27 text
APPLYING APP WIDE CHANGES
● USE A LIBRARY CALLED PROCESS PHEONIX
● WRITTEN BY JAKE WHARTON
● https://github.com/JakeWharton/ProcessPhoenix
#droidkaigi @droidchef
Slide 28
Slide 28 text
START THE DEFAULT ACTIVITY IN A NEW PROCESS
ProcessPhoenix.triggerRebirth(context);
Slide 29
Slide 29 text
OR, IF YOU WANT TO LAUNCH WITH AN INTENT
Intent nextIntent = //...
ProcessPhoenix.triggerRebirth(context,
nextIntent);
Slide 30
Slide 30 text
TO CHECK IF YOUR APP IS IN PHEONIX PROCESS,
TO SKIP INITIALIZATION IN onCreate
if (ProcessPhoenix.isPhoenixProcess(this)) {
return;
}
Slide 31
Slide 31 text
DON’T REINVENT THE WHEEL
#droidkaigi @droidchef
Slide 32
Slide 32 text
LEVERAGE EXISTING
OPEN SOURCE SOLUTIONS
#droidkaigi @droidchef
Slide 33
Slide 33 text
SOME MUST HAVE OPEN SOURCE LIBRARIES
IN YOUR PROJECT
#droidkaigi @droidchef
Slide 34
Slide 34 text
STETHO
● DEVELOPED BY FACEBOOK
● https://facebook.github.io/stetho/
Slide 35
Slide 35 text
CHROME DEVTOOLS
Slide 36
Slide 36 text
NETWORK INSPECTION
Slide 37
Slide 37 text
DATABASE INSPECTION
Slide 38
Slide 38 text
VIEW HIERARCHY INSPECTION
Slide 39
Slide 39 text
JAVASCRIPT CONSOLE TO INTERACT WITH APP
Slide 40
Slide 40 text
INSTALLS IN ONE LINE OF CODE
public class MyApplication extends
Application {
public void onCreate() {
super.onCreate();
Stetho.initializeWithDefaults(this);
}
}
Slide 41
Slide 41 text
LEAK CANARY
● DEVELOPED BY SQUARE
● https://github.com/square/leakcanary
Slide 42
Slide 42 text
TIMBER
● DEVELOPED BY JAKE WHARTON
● https://github.com/JakeWharton/timber
Slide 43
Slide 43 text
MAKING THE MOST OF ANDROID STUDIO DEBUGGER
@Override
public void onBindViewHolder(ViewHolder holder, final int
position) {
final String name = values.get(position);
holder.txtHeader.setText(name);
holder.txtFooter.setText("Footer: " + name);
}
Slide 44
Slide 44 text
@Override
public void onBindViewHolder(ViewHolder holder, final int
position) {
final String name = values.get(position);
holder.txtHeader.setText(name);
if (position % 3 == 0) {
holder.txtHeader.setTextColor(Color.GREEN);
}
holder.txtFooter.setText("Footer: " + name);
}
Slide 45
Slide 45 text
No content
Slide 46
Slide 46 text
CREATE A NEW RUN CONFIG
Slide 47
Slide 47 text
No content
Slide 48
Slide 48 text
No content
Slide 49
Slide 49 text
No content
Slide 50
Slide 50 text
No content
Slide 51
Slide 51 text
No content
Slide 52
Slide 52 text
No content
Slide 53
Slide 53 text
No content
Slide 54
Slide 54 text
GO SPREAD SOME
#droidkaigi @droidchef