[embedyt] https://www.youtube.com/watch?v=lneYmqe0qRI[/embedyt]
Links & DependenciesNote.javaactivity_main.xmlMainActivity.java
Firebase setup guide with dependencies and console link:
package com.codinginflow.firestoreexampleproject; import com.google.firebase.firestore.Exclude; public class Note { private String documentId; private String title; private String description; private int priority; public Note() { //public no-arg constructor needed } public Note(String title, String description, int priority) { this.title = title; this.description = description; this.priority = priority; } @Exclude public String getDocumentId() { return documentId; } public void setDocumentId(String documentId) { this.documentId = documentId; } public String getTitle() { return title; } public String getDescription() { return description; } public int getPriority() { return priority; } public void setPriority(int priority) { this.priority = priority; } }
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="16dp" tools:context="com.codinginflow.firestoreexampleproject.MainActivity"> <EditText android:id="@+id/edit_text_title" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="Title" android:inputType="text" /> <EditText android:id="@+id/edit_text_description" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="Description" android:inputType="text" /> <EditText android:id="@+id/edit_text_priority" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="Priority" android:inputType="number" /> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="addNote" android:text="Add" /> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="loadNotes" android:text="Load" /> <android.support.v4.widget.NestedScrollView android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/text_view_data" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="20sp" /> </android.support.v4.widget.NestedScrollView> </LinearLayout>
package com.codinginflow.firestoreexampleproject; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.EditText; import android.widget.TextView; import com.google.android.gms.tasks.OnSuccessListener; import com.google.android.gms.tasks.Task; import com.google.android.gms.tasks.Tasks; import com.google.firebase.firestore.CollectionReference; import com.google.firebase.firestore.DocumentReference; import com.google.firebase.firestore.EventListener; import com.google.firebase.firestore.FirebaseFirestore; import com.google.firebase.firestore.FirebaseFirestoreException; import com.google.firebase.firestore.QueryDocumentSnapshot; import com.google.firebase.firestore.QuerySnapshot; import java.util.List; public class MainActivity extends AppCompatActivity { private static final String TAG = "MainActivity"; private static final String KEY_TITLE = "title"; private static final String KEY_DESCRIPTION = "description"; private EditText editTextTitle; private EditText editTextDescription; private EditText editTextPriority; private TextView textViewData; private FirebaseFirestore db = FirebaseFirestore.getInstance(); private CollectionReference notebookRef = db.collection("Notebook"); private DocumentReference noteRef = db.document("Notebook/My First Note"); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); editTextTitle = findViewById(R.id.edit_text_title); editTextDescription = findViewById(R.id.edit_text_description); editTextPriority = findViewById(R.id.edit_text_priority); textViewData = findViewById(R.id.text_view_data); } @Override protected void onStart() { super.onStart(); notebookRef.addSnapshotListener(this, new EventListener<QuerySnapshot>() { @Override public void onEvent(QuerySnapshot queryDocumentSnapshots, FirebaseFirestoreException e) { if (e != null) { return; } String data = ""; for (QueryDocumentSnapshot documentSnapshot : queryDocumentSnapshots) { Note note = documentSnapshot.toObject(Note.class); note.setDocumentId(documentSnapshot.getId()); String documentId = note.getDocumentId(); String title = note.getTitle(); String description = note.getDescription(); int priority = note.getPriority(); data += "ID: " + documentId + "\nTitle: " + title + "\nDescription: " + description + "\nPriority: " + priority + "\n\n"; } textViewData.setText(data); } }); } public void addNote(View v) { String title = editTextTitle.getText().toString(); String description = editTextDescription.getText().toString(); if (editTextPriority.length() == 0) { editTextPriority.setText("0"); } int priority = Integer.parseInt(editTextPriority.getText().toString()); Note note = new Note(title, description, priority); notebookRef.add(note); } public void loadNotes(View v) { Task task1 = notebookRef.whereLessThan("priority", 2) .orderBy("priority") .get(); Task task2 = notebookRef.whereGreaterThan("priority", 2) .orderBy("priority") .get(); Task<List<QuerySnapshot>> allTasks = Tasks.whenAllSuccess(task1, task2); allTasks.addOnSuccessListener(new OnSuccessListener<List<QuerySnapshot>>() { @Override public void onSuccess(List<QuerySnapshot> querySnapshots) { String data = ""; for (QuerySnapshot queryDocumentSnapshots : querySnapshots) { for (QueryDocumentSnapshot documentSnapshot : queryDocumentSnapshots) { Note note = documentSnapshot.toObject(Note.class); note.setDocumentId(documentSnapshot.getId()); String documentId = note.getDocumentId(); String title = note.getTitle(); String description = note.getDescription(); int priority = note.getPriority(); data += "ID: " + documentId + "\nTitle: " + title + "\nDescription: " + description + "\nPriority: " + priority + "\n\n"; } } textViewData.setText(data); } }); } }