[Back4App] - API 28 + Parse Server Android SDK 1.19.0

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

README.md

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+# [Back4App] - Android (API 28)
+
+Don't forget to paste your Back4App App ID, Client Key and GCMSenderId in the `strings.xml` file and `App.class`.
+
+## (Optional)
+
+Go to Back4App Dashboard and import the ./Cars.json file following the guide below:
+
+[Back4App - Import class](https://help.back4app.com/hc/en-us/articles/115003438951-How-can-I-import-to-my-Database-)

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.back4app.back4appandroid9"
+        minSdkVersion 28
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'androidx.appcompat:appcompat:1.0.0-beta01'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.2'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test:runner:1.1.0-alpha4'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha4'
+
+    implementation "com.github.parse-community.Parse-SDK-Android:parse:1.19.0"
+}
+
+repositories {
+    mavenCentral()
+    jcenter()
+    maven { url 'https://jitpack.io' }
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/back4app/back4appandroid9/ExampleInstrumentedTest.java

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+package com.back4app.back4appandroid9;
+
+import android.content.Context;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.back4app.back4appandroid9", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.back4app.back4appandroid9">
+
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:name=".App"
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <meta-data
+            android:name="com.parse.SERVER_URL"
+            android:value="@string/back4app_server_url" />
+        <meta-data
+            android:name="com.parse.APPLICATION_ID"
+            android:value="@string/back4app_app_id" />
+        <meta-data
+            android:name="com.parse.CLIENT_KEY"
+            android:value="@string/back4app_client_key" />
+
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/back4app/back4appandroid9/App.java

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+package com.back4app.back4appandroid9;
+
+import android.app.Application;
+
+import com.parse.Parse;
+
+public class App extends Application {
+    @Override
+    public void onCreate() {
+        super.onCreate();
+
+        Parse.initialize(new Parse.Configuration.Builder(this)
+                .applicationId(getString(R.string.back4app_app_id))
+                // if desired
+                .clientKey(getString(R.string.back4app_client_key))
+                .server(getString(R.string.back4app_server_url))
+                .build()
+        );
+    }
+}

app/src/main/java/com/back4app/back4appandroid9/MainActivity.java

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+package com.back4app.back4appandroid9;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.ListView;
+import android.widget.Toast;
+
+import com.parse.FindCallback;
+import com.parse.GetCallback;
+import com.parse.ParseException;
+import com.parse.ParseObject;
+import com.parse.ParseQuery;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MainActivity extends AppCompatActivity {
+    public ArrayList<String> dataList = new ArrayList<String>();
+    public String[] myArray = {};
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        final Button retrieve_data = findViewById(R.id.btnRetrieveData);
+
+        retrieve_data.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                myArray = new String[]{};
+                final ListView listView = (ListView) findViewById(R.id.listviewA);
+
+                ParseQuery<ParseObject> query = ParseQuery.getQuery("Cars");
+                query.findInBackground(new FindCallback<ParseObject>() {
+                    public void done(List<ParseObject> results, ParseException e) {
+                        if (e == null) {
+                            for(int i = 0; i < results.size(); i++) {
+                                String carName = results.get(i).getString("name");
+                                dataList.add(carName.toString());
+                            }
+                        } else {
+                            // results have all the Posts the current user liked.
+                            final Toast toast = Toast.makeText(
+                                    MainActivity.this,
+                                    String.valueOf("Error =>" + e.getMessage()),
+                                    Toast.LENGTH_LONG
+                            );
+                            toast.show();
+                        }
+                    }
+                });
+
+                myArray = dataList.toArray(new String[dataList.size()]);
+                ArrayAdapter<String> adapterList
+                        = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_single_choice, myArray);
+
+                listView.setAdapter(adapterList);
+            }
+        });
+
+    }
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>