Firebaseを利用したAndroidアプリ開発実践入門

'JSFCBTF׾ⵃ欽׃׋
"OESPJE،فٔꟚ涪
㹋騧ⰅꟌ
涯㿊俑䕕
!GVTIJSPZBNB

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荈䊹稱➜
涯㿊俑䕕
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"OESPJE"QQ&OHJOFFS
馯㄂䧄㘋ծ㶨肪ג
ս鸬鯹վأوم،فٔꟚ涪׾⸇鸞ׅ׷
'JSFCBTF׾⢪׏ג׫״ֲ
IUUQHJIZPKQEFWTFSJBMGJSFCBTF

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劤傈ך،آؑٝت
˖ 'JSFCBTFך嚊銲ֶׁ׵ְ
˖ رٌ،فٔ稱➜
˖ "VUIFOUJDBUJPO
˖ 3FBMUJNF%BUBCBTF
˖ 4UPSBHF
˖ 3FNPUF$POGJH
˖ ׉ך➭5JQT

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'JSFCBTFך嚊銲ֶׁ׵ְ

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˖ (PPHMF*0דًآٍ٦،حفر٦ز
˖ 窟さٌغ؎ٕفٓحزؿؓ٦يפה鹌⻉
˖ "OBMZUJDT׾⚥呌ה׃גׁתׂתז؟٦ؽ
أָ埆鯥ד鸬䵿

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˖ (PPHMF*0דًآٍ٦،حفر٦ز
˖ 窟さٌغ؎ٕفٓحزؿؓ٦يפה鹌⻉
˖ "OBMZUJDT׾⚥呌ה׃גׁתׂתז؟٦ؽ
أָ埆鯥ד鸬䵿
劤傈כ'JSFCBTFך醱侧ך؟٦ؽأ׾⢪ְז
ָ׵㹋騧涸ז"OESPJE،فٔך⡲׶倯׾稱
➜׃תׅ

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رٌ،فٔ稱➜

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رٌ،فٔ稱➜
׻ְ׻ְثٍحز
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EFUBJMT JEVTTIJSPZBNBBOESPJEGJSFCBTFSFBMUJNFDIBU
˖ ٔ،ٕة؎يثٍحز
˖ 5XJUUFS钠鏾
˖ ًحإ٦آך鷏⥋
˖ 歗⫷ך،حفٗ٦س
˖ 荈ⴓך鷏׏׋ًحإ٦آך⵴ꤐ
˖ 荈ⴓך鷏׏׋歗⫷ך⵴ꤐ
IUUQTHJUIVCDPNTSZN'JSFCBTF3FBM5JNF$IBU

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رٌ،فٔ稱➜

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'JSFCBTF4%,

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// Top-level build file 
 
buildscript { 
repositories { 
jcenter() 
mavenCentral() 
} 
dependencies { 
classpath 'com.google.gms:google-services:3.0.0' 
} 
}
فٗآؙؑزךCVJMEHSBEMF

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def firebase_lib_version = '9.6.1' 
 
dependencies { 
compile fileTree(dir: 'libs', include: ['*.jar']) 
 
compile "com.google.firebase:firebase-core:${firebase_lib_version}" 
} 
 
// THIS MUST BE AT THE BOTTOM 
apply plugin: 'com.google.gms.google-services'
،فٌٔآُ٦ٕךCVJMEHSBEMF

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"VUIFOUJDBUJPO

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"VUIFOUJDBUJPO
˖ 'JSFCBTFך钠鏾㛇湍
˖ 'JSFCBTF荈魦ָ*%1"44ח״׷钠鏾堣圓׾䭯׏ג
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˖ ⼡せךٙٝة؎ي钠鏾
˖ 醱侧钠鏾فٗغ؎تך钠鏾䞔㜠ך窟さ
˖ ׻ְ׻ְثٍحزדכ5XJUUFS钠鏾׾ⵃ欽׃תׅ

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"VUIFOUJDBUJPO

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"VUIFOUJDBUJPO
˖ BQQTUXJUUFSDPN
˖ $SFBUF/FX"QQ

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"VUIFOUJDBUJPO

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dependencies { 
compile "com.google.firebase:firebase-core:${firebase_lib_version}"
compile "com.google.firebase:firebase-auth:${firebase_lib_version}" 
} 
 

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"VUIFOUJDBUJPO
"OESPJE4UVEJP

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public class MyApplication extends Application { 
public ApplicationComponent applicationComponent; 
 
@Override 
public void onCreate() { 
super.onCreate(); 
 
TwitterAuthConfig authConfig = new TwitterAuthConfig(BuildConfig.TWITTER_KEY,
BuildConfig.TWITTER_SECRET); 
Fabric.with(this, new Twitter(authConfig), new Crashlytics()); 
} 
 
}

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public class MyApplication extends Application { 
public ApplicationComponent applicationComponent; 
 
@Override 
public void onCreate() { 
super.onCreate(); 
 
TwitterAuthConfig authConfig = new TwitterAuthConfig(BuildConfig.TWITTER_KEY,
BuildConfig.TWITTER_SECRET); 
Fabric.with(this, new Twitter(authConfig), new Crashlytics()); 
} 
 
} "1*,FZ 4FDSFU

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android:layout_width="match_parent" 
android:layout_height="match_parent"> 
 
android:id="@+id/twitter_login_button" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_centerInParent="true" /> 
 

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android:layout_width="match_parent" 
android:layout_height="match_parent"> 
 
android:id="@+id/twitter_login_button" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_centerInParent="true" /> 
 

5XJUUFSؚٗ؎ٝنةٝ

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@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
twitterLoginButton.onActivityResult(requestCode, resultCode, data); 
}

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@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
twitterLoginButton.onActivityResult(requestCode, resultCode, data); 
}
钠鏾䖓؝٦ٕغحؙ

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twitterLoginButton.setCallback(new Callback() { 
@Override 
public void success(Result result) { 
TwitterSession session = result.data; 
TwitterAuthToken token = session.getAuthToken(); 
AuthCredential credential = TwitterAuthProvider.getCredential(token.token, token.secret); 
 
FirebaseAuth firebaseAuth = FirebaseAuth.getInstance(); 
firebaseAuth.signInWithCredential(credential) 
.addOnSuccessListener(authResult -> { 
FirebaseUser firebaseUser = authResult.getUser(); 
String uid = firebaseUser.getUid(); 
UserInfo twitterUser = firebaseUser.getProviderData().get(1); 
String name = twitterUser.getDisplayName(); 
String thumbnail = twitterUser.getPhotoUrl().toString(); 
}) 
.addOnFailureListener(e -> Log.e(TAG, e.getMessage(), e)); 
} 
 
@Override 
public void failure(TwitterException exception) { 
} 
});

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@Override 
 
}) 
} 
 
@Override 
} 
});
ؙٔحؙ

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@Override 
 
}) 
} 
 
@Override 
} 
});
5XJUUFSךز٦ؙٝ

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@Override 
 
}) 
} 
 
@Override 
} 
});
'JSFCBTFך钠鏾彊⪒

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@Override 
 
}) 
} 
 
@Override 
} 
});
'JSFCBTFחؚٗ؎ٝ

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@Override 
 
}) 
} 
 
@Override 
} 
});
'JSFCBTFⰻךِ٦ؠ

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@Override 
 
}) 
} 
 
@Override 
} 
});
♧䠐ז*%

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if (firebaseAuth.getCurrentUser() != null) { 
FirebaseUser firebaseUser = firebaseAuth.getCurrentUser(); 
}

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if (firebaseAuth.getCurrentUser() != null) { 
FirebaseUser firebaseUser = firebaseAuth.getCurrentUser(); 
}
ؚٗ؎ٝ幥׫

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@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
switch (item.getItemId()) { 
case R.id.action_logout: 
firebaseAuth.signOut(); 
return true; 
default: 
return super.onOptionsItemSelected(item); 
} 
}

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@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
switch (item.getItemId()) { 
case R.id.action_logout: 
firebaseAuth.signOut(); 
return true; 
default: 
return super.onOptionsItemSelected(item); 
} 
} ؚٗ،ؐز

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"VUIFOUJDBUJPO
˖ 钠鏾فٗغ؎تח״׏ג《䖤דֹ׷䞔㜠ח蕯䎁ך
䊴殯ָ֮׷ָծ㛇劤涸ז⢪ְ倯כ➭ךفٗغ؎ت
׮ずׄ
˖ 'JSFBCBTF6TFSHFU6JE
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׷ֿהָ⥂鏾ׁ׸גְ׷
˖ 6*ה钠鏾Ⳣ椚ָמהאחז׏׋'JSFBCBTF6*
ك٦ةהְֲך׮֮׷

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3FBMUJNF%BUBCBTF

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3FBMUJNF%BUBCBTF
˖ ٔ،ٕة؎يחず劍ׁ׸׷ر٦ةك٦أ
˖ أؗ٦وٖأז/P42-
˖ ر٦ةכ+40/䕎䒭ד⥂䭯
˖ ؔؿٓ؎ٝ؟ه٦ز
˖ "OESPJE J04 8FC
˖ 厫鮾ז،ؙإأⵖ䖴

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ر٦ة圓鸡
{
"users": {
"alovelace": {
"name": "Ada Lovelace",
"contacts": { "ghopper": true },
},
"ghopper": { ... },
"eclarke": { ... }
}
}
+40/ד邌植דֹ׷⟣䠐ךر٦ة圓鸡

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ر٦ة圓鸡
劤傈䪔ֲر٦ة圓鸡
{
"messages" : {
"message01" : {
"body" : "hello!",
"senderUid" : "user0001",
"type" : 0
},
.....
},
"users" : {
"user01" : {
"name" : "Steve",
"thumbnail" : "http://example.com/img/user01.jpg"
},
....
}
}

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ر٦ة圓鸡
ط؎ذ؍ـדٔأزכ؟ه٦زׁ׸זְ
{
"messages" : {
"message01" : {
"body" : "hello!",
"type" : 0
},
.....
},
"users" : {
"user01" : {
"name" : "Steve",
"thumbnail" : "http://example.com/img/user01.jpg"
},
....
}
}

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➙傈䠐陎׃ג妜׃ְֿה

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ر٦ة圓鸡
{
"messages" : {
"message01" : {
"body" : "hello!",
"type" : 0
},
"message02" : {
"body" : "how are you!",
"type" : 0
},
....
}
}

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➙傈䠐陎׃ג妜׃ְֿה

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ر٦ة圓鸡
{
"messages" : {
"message01" : {
"body" : "hello!",
"type" : 0
},
"message02" : {
"body" : "how are you!",
"type" : 0
},
....
}
}

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3FBMUJNF%BUBCBTF
˖ ؎كٝزسٔـٌٝرٕ
˖ 妜׃ְة؎ىؚٝד《׶ח遤ֻךדכזֻծ圫ղ
ז؎كٝزח㼎׃גٔأش׾涫ꐮ׃גֶֹծ؎ك
ٝز涪欰׀הח؝٦ٕغحؙ׃ג׮׵ֲ
˖ ر٦ةךٔؿ؋ٖٝأח㼎׃גٔأش׾鏣㹀ׅ׷
ֿ׸׵ך暴䗙׾䬃ִׁגֶֻֿהָꅾ銲

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؎كٝزٔأشך珏겲
ٔأش ؎كٝز 欽鷿
7BMVF&WFOU-JTUFOFS PO%BUB$IBOHF

ػأך؝ٝذٝخח㼎ׅ׷
㢌刿儗חㄎל׸׷
$IJME&WFOU-JTUFOFS PO$IJME"EEFE

ٔأزח㶨銲稆ָ鷄⸇ׁ׸
׋儗חㄎל׸׷
$IJME&WFOU-JTUFOFS PO$IJME$IBOHFE

ٔأزך㶨銲稆ח㢌刿ָ֮
׏׋儗חㄎל׸׷
$IJME&WFOU-JTUFOFS PO$IJME3FNPWFE

ٔأزך㶨銲稆ָ⵴ꤐׁ׸
׋儗חㄎל׸׷
$IJME&WFOU-JTUFOFS PO$IJME.PWFE

ٔأزך㶨銲稆ך갫䎷ָ㢌
׻׏׋儗חㄎל׸׷

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dependencies { 
compile "com.google.firebase:firebase-auth:${firebase_lib_version}"
compile "com.google.firebase:firebase-database:${firebase_lib_version}" 
} 
 

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ر٦ةך知⽃ז铣׫剅ֹ
// Write a message to the database
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference myRef = database.getReference("message");
myRef.setValue("Hello, World!");

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ر٦ةך知⽃ז剅ֹ鴥׫
ر٦ةك٦أפ،ؙإأׅ׷彊⪒

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NFTTBHFפך⿫撑

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NFTTBHF)FMMP 8PSMEה剅ֹ鴥׫

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ر٦ةך知⽃ז铣׫⳿׃
DatabaseReference messageRef = database.getReference("message");
ValueEventListener messageListener = new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String message = dataSnapshot.getValue(String.class);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
};
messageRef.addValueEventListener(messageListener);
NFTTBHFפך⿫撑

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@Override
}
@Override
}
};
7BMVF&WFOU-JTUFOFSך⡲䧭

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@Override
}
@Override
}
};
ر٦ةך《׶⳿׃

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@Override
}
@Override
}
};
ٔأشך鏣㹀

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׍ז׫ח˘
ٔؿ؋ٖٝأכDIJME
ד⟣䠐ך
帾ׁתד䱠׏גְֻֿהָדֹ׷
private void writeNewUser(String userId, String name, String email) {
User user = new User(name, email);
mDatabase.child("users").child(userId).setValue(user);
}

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7BMVF&WFOU-JTUFOFS
ValueEventListener postListener = new ValueEventListener() {
@Override
// Get Post object and use the values to update the UI
Post post = dataSnapshot.getValue(Post.class);
// ...
}
@Override
// Getting Post failed, log a message
Log.w(TAG, "loadPost:onCancelled", databaseError.toException());
// ...
}
};
mPostReference.addValueEventListener(postListener);

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7BMVF&WFOU-JTUFOFS
ValueEventListener postListener = new ValueEventListener() {
@Override
// Get Post object and use the values to update the UI
Post post = dataSnapshot.getValue(Post.class);
// ...
}
@Override
// Getting Post failed, log a message
Log.w(TAG, "loadPost:onCancelled", databaseError.toException());
// ...
}
};
mPostReference.addValueEventListener(postListener);
⥂㶷׮铣׫⳿׃׮⟣䠐ך10+0ָ⢪欽〳腉

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$IJME&WFOU-JTUFOFS
ChildEventListener childEventListener = new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildAdded:" + dataSnapshot.getKey());
// A new comment has been added, add it to the displayed list
Comment comment = dataSnapshot.getValue(Comment.class);
// ...
}

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$IJME&WFOU-JTUFOFS
ChildEventListener childEventListener = new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildAdded:" + dataSnapshot.getKey());
// A new comment has been added, add it to the displayed list
Comment comment = dataSnapshot.getValue(Comment.class);
// ...
}
PO$IJME"EEFE
כ㶨銲稆ך鷄⸇

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$IJME&WFOU-JTUFOFS
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildChanged:" + dataSnapshot.getKey());
// A comment has changed, use the key to determine if we are displaying this
// comment and if so displayed the changed comment.
Comment newComment = dataSnapshot.getValue(Comment.class);
String commentKey = dataSnapshot.getKey();
// ...
}

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$IJME&WFOU-JTUFOFS
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildChanged:" + dataSnapshot.getKey());
// comment and if so displayed the changed comment.
Comment newComment = dataSnapshot.getValue(Comment.class);
// ...
}
PO$IJME$IBOHFE
כ㶨銲稆ך㢌⻉

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$IJME&WFOU-JTUFOFS
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
Log.d(TAG, "onChildRemoved:" + dataSnapshot.getKey());
// comment and if so remove it.
// ...
}

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$IJME&WFOU-JTUFOFS
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
Log.d(TAG, "onChildRemoved:" + dataSnapshot.getKey());
// comment and if so remove it.
// ...
}
PO$IJME3FNPWFE
כ㶨銲稆ך⵴ꤐ

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$IJME&WFOU-JTUFOFS
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildMoved:" + dataSnapshot.getKey());
// A comment has changed position, use the key to determine if we are
// displaying this comment and if so move it.
Comment movedComment = dataSnapshot.getValue(Comment.class);
// ...
}

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$IJME&WFOU-JTUFOFS
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildMoved:" + dataSnapshot.getKey());
// A comment has changed position, use the key to determine if we are
// displaying this comment and if so move it.
Comment movedComment = dataSnapshot.getValue(Comment.class);
// ...
}
PO$IJME.PWFE
כ㶨銲稆ך갫殢Ⰵ剏

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$IJME&WFOU-JTUFOFS
@Override
Log.w(TAG, "postComments:onCancelled", databaseError.toException());
Toast.makeText(mContext, "Failed to load comments.",
Toast.LENGTH_SHORT).show();
}
};
ref.addChildEventListener(childEventListener);

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$IJME&WFOU-JTUFOFS
@Override
Log.w(TAG, "postComments:onCancelled", databaseError.toException());
Toast.makeText(mContext, "Failed to load comments.",
Toast.LENGTH_SHORT).show();
}
};
ref.addChildEventListener(childEventListener);
BEE$IJME&WFOU-JTUFOFSחإحز
埄ꣲךؒٓ٦瘝

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ٔأزח㶨銲稆׾鷄⸇
DatabaseReference newMessageRef = databaseReference.child("/messages").push(); 
 
newMessageRef 
.setValue(message) 
.addOnSuccessListener(result -> Log.d(TAG, "try message send.")) 
.addOnFailureListener(error -> handleError(error, R.string.message_sent_error));

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newMessageRef 
QVTI
דة؎يأةٝفח㛇בֻLFZָ荈⹛涪遤ׁ׸׷

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newMessageRef 
֮הכֿ׸תדず圫TFU7BMVFׅ׷׌ֽ

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銲稆ך⚛ן剏ִ
ًاحس 欽鷿
PSEFS#Z$IJME
䭷㹀׃׋㶨銲稆ך⦼׾׮הח⚛ן剏ִ
PSEFS#Z,FZ
㶨銲稆ךؗ٦׾׮הח⚛ן剏ִ
PSEFS#Z7BMVF
㶨銲稆荈魦ך⦼׾׮הח⚛ן剏ִ
PSEFS#Z1SJPSJUZ
⮚⯓䏝׾׮הח⚛ן剏ִ

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銲稆ך⚛ן剏ִ
String myUserId = getUid();
Query myTopPostsQuery = databaseReference.child("user-posts").child(myUserId)
.orderByChild("starCount");
myTopPostsQuery.addChildEventListener(new ChildEventListener() {
// TODO: implement the ChildEventListener methods as documented above
// ...
});

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銲稆ך⚛ן剏ִ
// ...
});
⟣䠐ךٔؿ؋ٖٝأ׾⿫撑

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銲稆ך⚛ן剏ִ
// ...
});
ا٦ز勴⟝׾䭷㹀

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銲稆ך⚛ן剏ִ
// ...
});
ֿ׸תד鸐׶ٔأش׾إحز

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銲稆ךؿ؍ٕة
ًاحس 欽鷿
MJNJU5P'JSTU
⯓걧ַ׵O⟝《䖤
MJNJU5P-BTU
䖓倯ַ׵O⟝《䖤
TUBSU"U
勴⟝חوحثׅ׷⦼⟃꣬׾《䖤
FOE"U
勴⟝חوحثׅ׷⦼תד׾《䖤
FRVBM5P
勴⟝חوحثׅ׷⦼׾《䖤

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銲稆ךؿ؍ٕة
Query recentPostsQuery = databaseReference.child("posts")
ɹɹɹɹɹ.orderByChild("starCount")
.startAt(5)
.limitToFirst(100);

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銲稆ךؿ؍ٕة
Query recentPostsQuery = databaseReference.child("posts")
ɹɹɹɹɹ.orderByChild("starCount")
.startAt(5)
.limitToFirst(100);
ا٦زה穈׫さ׻ׇ׷ֿה׮ծ⟣䠐ךؿ؍ٕةה♧筰ח
⢪ֲֿה׮דֹ׷

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4UPSBHF

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4UPSBHF
˖ (PPHMF$MPVE4UPSBHFךغ؛حز׾ⵃ欽׃׋غ؎
شٔر٦ة׾知⽃ַאإُؗ،ח䪔ֲֿהךדֹ
׷➬穈׫
˖ 3FBMUJNF%BUBCBTFכأزٖ٦آָ넝⣣זךדծ
׉ֿח歗⫷ؿ؋؎ٕ瘝׾縧ֻֿהכ֮ת׶植㹋涸
דכזְ
˖ ٔؿ؋ٖٝأך➬穈׫瘝כ3FBMUJNF%BUBCBTFח
״ֻ⡂גֶ׶ꬊ䌢ח知⽃ח䪔ֲֿהָ〳腉

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4UPSBHF

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dependencies { 
compile "com.google.firebase:firebase-storage:${firebase_lib_version}" 
} 
 

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4UPSBHF
FirebaseStorage storage = FirebaseStorage.getInstance();
StorageReference storageRef = storage.getReferenceFromUrl("gs://");
StorageReference imagesRef = storageRef.child("images");
StorageReference spaceRef = storageRef.child("images/space.jpg");
spaceRef.getPath();
spaceRef.getName();
spaceRef.getBucket();

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4UPSBHFח،حفٗ٦س
public void uploadImage(String filePath, boolean deletePath) { 
String fileName = UUID.randomUUID().toString(); 
StorageReference target = storageReference 
.child(IMG_DIR) 
.child(fileName); 
 
try { 
InputStream inputStream = new BufferedInputStream(new FileInputStream(filePath)); 
target.putStream(inputStream) 
.addOnSuccessListener(taskSnapshot -> { 
Log.d(TAG, "upload succeeded."); 
long totalBytes = taskSnapshot.getTotalByteCount(); 
Uri downloadUri = taskSnapshot.getDownloadUrl(); 
}) 
} catch (FileNotFoundException e) { 
Log.e(TAG, e.getMessage(), e); 
} 
}

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4UPSBHFח،حفٗ٦س
public void uploadImage(String filePath, boolean deletePath) { 
String fileName = UUID.randomUUID().toString(); 
.child(IMG_DIR) 
 
try { 
InputStream inputStream = new BufferedInputStream(new FileInputStream(filePath)); 
target.putStream(inputStream) 
.addOnSuccessListener(taskSnapshot -> { 
Log.d(TAG, "upload succeeded."); 
long totalBytes = taskSnapshot.getTotalByteCount(); 
Uri downloadUri = taskSnapshot.getDownloadUrl(); 
}) 
} catch (FileNotFoundException e) { 
Log.e(TAG, e.getMessage(), e); 
} 
} ؙٓ؎،ٝزכֿ׸׾تؐٝٗ٦س

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4UPSBHFַ׵⵴ꤐ
public void deleteImage(String fileName) { 
.child(IMG_DIR) 
target.delete() 
.addOnSuccessListener(result -> Log.d(TAG, "image delete ok.")) 
.addOnFailureListener(error -> Log.e(TAG, error.getMessage(), error)); 
}

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3FNPUF$POGJH

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3FNPUF$POGJH
˖ "#ذأزזו׾ꬊ䌢ח知⽃ח遤ֲ➬穈׫
˖ "#ذأز⟃㢩ח׮㕂ח״׷؝ٝذٝخ⳿׃ⴓ
ֽծؙٓ؎،ٝزךٔٔ٦أז׃ח俑鎉ך䊴׃剏
ִזו
˖ ؔٝٓ؎ٝ,FZ7BMVF4UPSFך״ֲז׮ך׌ָծ
طحزꬊ䱸竲儗ח׮ؒٓ٦搀ֻⵃ欽〳腉

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3FNPUF$POGJH

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dependencies { 
compile "com.google.firebase:firebase-storage:${firebase_lib_version}"
compile "com.google.firebase:firebase-config:${firebase_lib_version}" 
} 
 

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3FNPUF$POGJH

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3FNPUF$POGJH
 
 
 
chat_bg_color 
#87ceeb 
 

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3FNPUF$POGJH
FirebaseRemoteConfigSettings remoteConfigSettings = new FirebaseRemoteConfigSettings.Builder() 
.setDeveloperModeEnabled(BuildConfig.DEBUG) 
.build(); 
 
FirebaseRemoteConfig firebaseRemoteConfig = FirebaseRemoteConfig.getInstance(); 
firebaseRemoteConfig.setConfigSettings(remoteConfigSettings); 
firebaseRemoteConfig.setDefaults(R.xml.remote_config_defaults); 
 
if (firebaseRemoteConfig.getInfo().getConfigSettings().isDeveloperModeEnabled()) { 
cacheExpiration = 0; 
} 
 
firebaseRemoteConfig.fetch(cacheExpiration) 
.addOnSuccessListener(result -> Log.d(TAG, "Fetch succeeded.")) 
.addOnFailureListener(e -> Log.e(TAG, "Fetch failed.", e));

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3FNPUF$POGJH
public void setBackgroundColor(View target) { 
String colorHex = firebaseRemoteConfig.getString("chat_bg_color"); 
Log.d(TAG, "colorHex: " + colorHex); 
int color = Color.parseColor(colorHex); 
target.setBackgroundColor(color); 
}

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3FNPUF$POGJH

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3FNPUF$POGJH
˖ Ꟛ涪罏ٌ٦س׾剣⸬ח׃זְה儗꟦דؙٔؒأ
ز׃ַדֹזְזוعؤه؎ٝز֮׶
˖ ずֻׄծQSPEVDUJPO橆㞮ד♧䏝⦼׾《䖤ׅ׷ה
رؿٕؓزד儗꟦ٍؗحءׁُ׸׷זוծ濼׵
זְהعو׷ه؎ٝزָ֮׷
˖ ず劍涸ח《䖤ׅ׷⢪ְ倯ָ姻׃ְַוֲַכ嗚鎢
ך⡭㖑֮׶կأفٓحءُד《䖤ׅ׷ծغحؙؒ
ٝسד《䖤׃ג如㔐饯⹛儗ח剣⸬⻉ׅ׷זוװ׶
倯כ圫ղկ

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鷞갫ا٦ز
׉ך➭5JQT

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׉ך➭5JQT
˖ 3FBMUJNF%BUBCBTFכرؿٕؓزד鷞갫ا٦زָ
דֹזְ
˖ 1SJPSJUZ⮚⯓䏝׾⢪׏׋ٙ٦ؙ،ٓؐٝسָ
♧菙涸
˖ 1SJPSJUZכ⟣䠐ךٔؿ؋ٖٝأח⟣䠐ך⦼׾鏣㹀
דֹ׷կ

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׉ך➭5JQT
DatabaseReference newMessage = databaseReference.child(Message.PATH).push(); 
newMessage.setPriority(-timestamp);

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׉ך➭5JQT
DatabaseReference newMessage = databaseReference.child(Message.PATH).push(); 
newMessage.setPriority(-timestamp);
׋הִל5JNFTUBNQ׾痗〾⿾鯄

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׉ך➭5JQT
databaseReference.child(Message.PATH).orderByPriority();

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1VMM5P3FGSFTI
׉ך➭5JQT

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׉ך➭5JQT
˖ ٔأز朐ךر٦ة׾《䖤ׅ׷ꥷծ7BMVF&WFOUד
♧孡ח《׷倯岀׮֮׸לծ$IJME&WFOUדBEEׁ׸
׷ך׾䖉א倯岀׮֮׷կ
˖ 䖓罏כծ1VMM5P3FGSFTI儗זוחוֿדر٦ةך
「⥋ָ鷿ⴖ׸׷ַⴻ倖דֹזְկ
˖ ׃׋ָ׏גծPOFTIPUך7BMVF&WFOUה
$IJME&WFOU׾穈׫さ׻ׇ׷ךָ⸬卓涸

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׉ך➭5JQT
private ValueEventListener singleShotListener = new ValueEventListener() { 
@Override 
public void onDataChange(DataSnapshot dataSnapshot) { 
for (DataSnapshot snapshot : dataSnapshot.getChildren()) { 
Message message = getMessageWithId(snapshot);
// தུ 
updateTimestamp(message.getTimestamp()); 
}
ɹɹɹɹɹ// தུ 
 
databaseReference.child(Message.PATH)
.orderByChild(Message.KEY_TIMESTAMP)
.startAt(lastTimestamp + 1)
.addChildEventListener(childAddListener); 
} 
 
@Override 
public void onCancelled(DatabaseError databaseError) { } 
};

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،ؙإأⵖ䖴
׉ך➭5JQT

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׉ך➭5JQT
{
"rules": {
".read": false,
".write": false,
"users": {
".read": "auth != null",
"$user_id": {
".write": "auth != null && auth.uid === $user_id"
}
},
"messages": {
".indexOn": ["timestamp"],
"$message_id": {
".write": "(auth != null && auth.uid === newData.child('senderUid').val())
|| (auth != null && auth.uid === data.child('senderUid').val())"
}
}
},
}

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׉ך➭5JQT
{
"rules": {
".read": false,
".write": false,
"users": {
"$user_id": {
}
},
"messages": {
"$message_id": {
}
}
},
}
钠鏾幥׫

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׉ך➭5JQT
{
"rules": {
".read": false,
".write": false,
"users": {
"$user_id": {
}
},
"messages": {
"$message_id": {
}
}
},
}
倜׃ֻ剅ֹ鴥ת׸׷ر٦ة

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׉ך➭5JQT
{
"rules": {
".read": false,
".write": false,
"users": {
"$user_id": {
}
},
"messages": {
"$message_id": {
}
}
},
}
ֿ׸ַ׵⵴ꤐׅ׷ر٦ة

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תה׭
˖ (JU)VCךٖهآزٔהرٌ،فٔ׾僽ꬊ
⹛ַ׃ג׫גֻ׌ְׁ

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5IBOL:PV
׀꫼耮֮׶ָהֲ׀ְׂת׃׋կ
涯㿊俑䕕
!GVTIJSPZBNB

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Firebaseを利用したAndroidアプリ開発実践入門

Firebaseを利用したAndroidアプリ開発実践入門

Fumihiko Shiroyama

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