Firebase with Android

Firebase with Android

Transcript

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10. dependencies { compile 'com.firebase:firebase-client-android:2.5.2+' }
11. android { ... packagingOptions { exclude 'META-INF/LICENSE' exclude 'META-INF/LICENSE-FIREBASE.txt' exclude 'META-INF/NOTICE' } }
12. <uses-permission android:name="android.permission.INTERNET" />
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    "QQMJDBUJPO public class MyApplication extends Application {
 @Override
 public void onCreate() {
 super.onCreate();
 Firebase.setAndroidContext(this);
 }
 }
14. "OESPJE.BOJGFTUYNM <application
 android:name=".MyApplication"
 android:allowBackup="true"
 android:icon="@mipmap/ic_launcher"
 android:label="@string/app_name"
 android:supportsRtl="true"
 android:theme="@style/AppTheme">
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16. "OESPJE.BOJGFTUYNM Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").setValue("hello firebase!");
17. "DUJWJUZ Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").setValue("hello firebase!"); 3FGFSFODF
18. "DUJWJUZ Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").setValue("hello firebase!"); $IJME
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19. "DUJWJUZ Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").setValue("hello firebase!"); 8SJUJOH
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22. public class BlogPost { private String author; private String title; public BlogPost() { // empty default constructor // necessary for Firebase to be able to deserialize blog posts } public String getAuthor() { return author; } public String getTitle() { return title; } }
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    5SFF { "users": { "mchen": { "friends": { "brinchen": true }, "name": "Mary Chen", // our child node appears in the existing JSON tree "widgets": { "one": true, "three": true } }, "brinchen": { ... }, "hmadi": { ... } } }
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    +40/
    5SFF { "users": { "mchen": { "friends": { "brinchen": true }, "name": "Mary Chen", // our child node appears in the existing JSON tree "widgets": { "one": true, "three": true } }, "brinchen": { ... }, "hmadi": { ... } } }
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    +40/
    5SFF { "users": { "mchen": { "friends": { "brinchen": true }, "name": "Mary Chen", // our child node appears in the existing JSON tree "widgets": { "one": true, "three": true } }, "brinchen": { ... }, "hmadi": { ... } } } VTFSTNDIFOXJEHFUT
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    +40/
    5SFF { "users": { "mchen": { "friends": { "brinchen": true }, "name": "Mary Chen", // our child node appears in the existing JSON tree "widgets": { "one": true, "three": true } }, "brinchen": { ... }, "hmadi": { ... } } } VTFSTNDIFOXJEHFUT 6OJRVF
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31. Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").addValueEventListener(new ValueEventListener() {
 @Override
 public void onDataChange(DataSnapshot dataSnapshot) {
 Toast.makeText( MainActivity.this, dataSnapshot.getValue(String.class), Toast.LENGTH_SHORT ).show();
 }
 
 @Override
 public void onCancelled(FirebaseError firebaseError) {
 
 }
 });
32. Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").addValueEventListener(new ValueEventListener() {
 @Override
 public void onDataChange(DataSnapshot dataSnapshot) {
 Toast.makeText( MainActivity.this, dataSnapshot.getValue(String.class), Toast.LENGTH_SHORT ).show();
 }
 
 @Override
 public void onCancelled(FirebaseError firebaseError) {
 
 }
 });
33. Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").addValueEventListener(new ValueEventListener() {
 @Override
 public void onDataChange(DataSnapshot dataSnapshot) {
 Toast.makeText( MainActivity.this, dataSnapshot.getValue(String.class), Toast.LENGTH_SHORT ).show();
 }
 
 @Override
 public void onCancelled(FirebaseError firebaseError) {
 
 }
 });
34. Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").addValueEventListener(new ValueEventListener() {
 @Override
 public void onDataChange(DataSnapshot dataSnapshot) {
 Toast.makeText( MainActivity.this, dataSnapshot.getValue(String.class), Toast.LENGTH_SHORT ).show();
 }
 
 @Override
 public void onCancelled(FirebaseError firebaseError) {
 
 }
 });
35. Firebase firebaseRef = new Firebase("https://shiroyama-app-01.firebaseio.com/");
 firebaseRef.child("message").addValueEventListener(new ValueEventListener() {
 @Override
 public void onDataChange(DataSnapshot dataSnapshot) {
 Toast.makeText( MainActivity.this, dataSnapshot.getValue(String.class), Toast.LENGTH_SHORT ).show();
 }
 
 @Override
 public void onCancelled(FirebaseError firebaseError) {
 
 }
 });
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39. // Get a reference to our posts Firebase ref = new Firebase("https://docs-examples.firebaseio.com/web/saving-data/fireblog/posts"); // Attach an listener to read the data at our posts reference ref.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot snapshot) { System.out.println("There are " + snapshot.getChildrenCount() + " blog posts"); for (DataSnapshot postSnapshot: snapshot.getChildren()) { BlogPost post = postSnapshot.getValue(BlogPost.class); System.out.println(post.getAuthor() + " - " + post.getTitle()); } } @Override public void onCancelled(FirebaseError firebaseError) { System.out.println("The read failed: " + firebaseError.getMessage()); } });
40. // Get a reference to our posts Firebase ref = new Firebase("https://docs-examples.firebaseio.com/web/saving-data/fireblog/posts"); // Attach an listener to read the data at our posts reference ref.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot snapshot) { System.out.println("There are " + snapshot.getChildrenCount() + " blog posts"); for (DataSnapshot postSnapshot: snapshot.getChildren()) { BlogPost post = postSnapshot.getValue(BlogPost.class); System.out.println(post.getAuthor() + " - " + post.getTitle()); } } @Override public void onCancelled(FirebaseError firebaseError) { System.out.println("The read failed: " + firebaseError.getMessage()); } });
41. // Get a reference to our posts Firebase ref = new Firebase("https://docs-examples.firebaseio.com/web/saving-data/fireblog/posts"); // Attach an listener to read the data at our posts reference ref.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot snapshot) { System.out.println("There are " + snapshot.getChildrenCount() + " blog posts"); for (DataSnapshot postSnapshot: snapshot.getChildren()) { BlogPost post = postSnapshot.getValue(BlogPost.class); System.out.println(post.getAuthor() + " - " + post.getTitle()); } } @Override public void onCancelled(FirebaseError firebaseError) { System.out.println("The read failed: " + firebaseError.getMessage()); } });
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43. // Get a reference to our posts Firebase ref = new Firebase("https://docs-examples.firebaseio.com/web/saving-data/fireblog/posts"); ref.addChildEventListener(new ChildEventListener() { // Retrieve new posts as they are added to the database @Override public void onChildAdded(DataSnapshot snapshot, String previousChildKey) { BlogPost newPost = snapshot.getValue(BlogPost.class); System.out.println("Author: " + newPost.getAuthor()); System.out.println("Title: " + newPost.getTitle()); } //... ChildEventListener also defines onChildChanged, onChildRemoved, // onChildMoved and onCanceled, covered in later sections. });
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45. @Override public void onChildChanged(DataSnapshot snapshot, String previousChildKey) { String title = (String) snapshot.child("title").getValue(); System.out.println("The updated post title is " + title); }
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47. @Override public void onChildRemoved(DataSnapshot snapshot) { String title = (String) snapshot.child("title").getValue(); System.out.println("The blog post titled " + title + " has been deleted"); }
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49. @Override public void onChildMoved(DataSnapshot snapshot, String previousChildKey) { String title = (String) snapshot.child("title").getValue(); System.out.println("The updated post title is " + title); }
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52. ref.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(DataSnapshot snapshot) { // do some stuff once } @Override public void onCancelled(FirebaseError firebaseError) { } });
53. ref.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(DataSnapshot snapshot) { // do some stuff once } @Override public void onCancelled(FirebaseError firebaseError) { } });
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55. { "lambeosaurus": { "height" : 2.1, "length" : 12.5, "weight": 5000 }, "stegosaurus": { "height" : 4, "length" : 9, "weight" : 2500 } }
56. public class DinosaurFacts { long height; double length; long weight; public DinosaurFacts() { // empty default constructor // necessary for Firebase to be able to deserialize blog posts } public long getHeight() { return height; } public double getLength() { return length; } public long getWeight() { return weight; } }
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58. PSEFS#Z$IJME Query queryRef = ref.orderByChild("height"); or Query queryRef = ref.orderByChild("dimensions/height");
59. PSEFS#Z,FZ Query queryRef = ref.orderByKey(); { "lambeosaurus": { "height" : 2.1, "length" : 12.5, "weight": 5000 }, "stegosaurus": { "height" : 4, "length" : 9, "weight" : 2500 } }
60. PSEFS#Z7BMVF Query queryRef = ref.orderByValue(); { "scores": { "bruhathkayosaurus" : 55, "lambeosaurus" : 21, "linhenykus" : 80, "pterodactyl" : 93, "stegosaurus" : 5, "triceratops" : 22 } }
61. PSEFS#Z1SJPSJUZ Query queryRef = ref.orderByPriority();
62. PSEFS#Z1SJPSJUZ Query queryRef = ref.orderByPriority(); BSCJUSBSZ
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64. Query queryRef = ref.orderByChild("height").limitToFirst(2); Query queryRef = scoresRef.orderByValue().limitToLast(3); Query queryRef = ref.orderByChild("height").startAt(3); Query queryRef = ref.orderByKey().endAt("pterodactyl"); Query queryRef = ref.orderByChild("height").equalTo(25);
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67. { "rules": { "users": { "$user_id": { ".write": "$user_id === auth.uid" } } } }
68. { "rules": { "users": { "$user_id": { ".write": "$user_id === auth.uid" } } } }
69. { "rules": { "users": { "$user_id": { ".write": "$user_id === auth.uid" } } } } UBMLT
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73. Firebase ref = new Firebase("https://<YOUR-FIREBASE-APP>.firebaseio.com/"); ref.authWithCustomToken(AUTH_TOKEN, new Firebase.AuthResultHandler() { @Override public void onAuthenticationError(FirebaseError error) { System.err.println("Login Failed! " + error.getMessage()); } @Override public void onAuthenticated(AuthData authData) { System.out.println("Login Succeeded!"); } });
74. Firebase ref = new Firebase("https://<YOUR-FIREBASE-APP>.firebaseio.com/"); ref.authWithCustomToken(AUTH_TOKEN, new Firebase.AuthResultHandler() { @Override public void onAuthenticationError(FirebaseError error) { System.err.println("Login Failed! " + error.getMessage()); } @Override public void onAuthenticated(AuthData authData) { System.out.println("Login Succeeded!"); } });
75. Firebase ref = new Firebase("https://<YOUR-FIREBASE-APP>.firebaseio.com/"); ref.authWithCustomToken(AUTH_TOKEN, new Firebase.AuthResultHandler() { @Override public void onAuthenticationError(FirebaseError error) { System.err.println("Login Failed! " + error.getMessage()); } @Override public void onAuthenticated(AuthData authData) { System.out.println("Login Succeeded!"); } }); HJWFO
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76. Firebase ref = new Firebase("https://<YOUR-FIREBASE-APP>.firebaseio.com/"); ref.authWithCustomToken(AUTH_TOKEN, new Firebase.AuthResultHandler() { @Override public void onAuthenticationError(FirebaseError error) { System.err.println("Login Failed! " + error.getMessage()); } @Override public void onAuthenticated(AuthData authData) { System.out.println("Login Succeeded!"); } });
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