1. Create an Android project:

2. Adding Runtime SDK dependencies

ESRI provides two SDK modes, one is local mode, but this mode is more troublesome, the other is networking mode, I use networking mode.

Add:

allprojects {
  repositories {
    google()
    jcenter()
    // Adding Esri Public Bintray Maven repository
    maven {
        url 'https://esri.bintray.com/arcgis'
    }
  }
}

Add:

dependencies {
    [Other implementation]
    //Adding Runtime dependencies
    implementation 'com.esri.arcgisruntime:arcgis-android:100.3.0'
    implementation fileTree(dir: 'libs', include: ['*.jar'])
}

Note: If a similar error occurs, such as "Manifest merger failed: uses-sdk: minSdKV ersion 15 cannot be smaller than version 19 declared in Library [com.esri.arcgisruntime: arcgis-android: 100.3.0]", the Android SDK version needs to be modified.

Modify in Build.gradle of Modele:

minSdkVersion 19

3. Setting up the interface layout:

Add MapView control to layout XML in layout:

<!-- MapView control -->
    <com.esri.arcgisruntime.mapping.view.MapView
        android:id="@+id/mapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </com.esri.arcgisruntime.mapping.view.MapView>

4. Write code:

In the onCreate method of laying out the corresponding Activty in the previous step:

//Get the MapView control in Layout and remember to create the mMapView object outside
mMapView = (MapView) findViewById(R.id.mapView);
//Create a map object
ArcGISMap map = new ArcGISMap();
//Create and add map services
String strMapUrl="http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineCommunity/MapServer";
ArcGISTiledLayer arcGISTiledLayer = new ArcGISTiledLayer(strMapUrl);
//Create the underlying map and set the underlying layer
Basemap basemap = new Basemap();
basemap.getBaseLayers().add(arcGISTiledLayer);
//Setting up the map base map
map.setBasemap(basemap);
//Setting map Map Object to Display in MapView Control
mMapView.setMap(map);

5. Add permissions and OpenGL ES support:

Add in Android Manifest. xml:

<!--Networking permission -->
<uses-permission android:name="android.permission.INTERNET" />
<!--OpenGL ES Support -->
<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true" />

6. Running APP: You can browse and zoom in a simple 2D map

7. supplement:

Map events about MapView:

        //Map Event Method
        mMapView.setOnTouchListener(new MapView.OnTouchListener() {
            @Override
            public boolean onMultiPointerTap(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onDoubleTouchDrag(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onUp(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onRotate(MotionEvent motionEvent, double v) {
                return false;
            }

            @Override
            public boolean onSingleTapConfirmed(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onDoubleTap(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onDoubleTapEvent(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onDown(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public void onShowPress(MotionEvent motionEvent) {

            }

            @Override
            public boolean onSingleTapUp(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
                return false;
            }

            @Override
            public void onLongPress(MotionEvent motionEvent) {

            }

            @Override
            public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
                return false;
            }

            @Override
            public boolean onScale(ScaleGestureDetector scaleGestureDetector) {
                return false;
            }

            @Override
            public boolean onScaleBegin(ScaleGestureDetector scaleGestureDetector) {
                return false;
            }

            @Override
            public void onScaleEnd(ScaleGestureDetector scaleGestureDetector) {

            }

            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                return false;
            }
        });

(2) Remember that MapView is also operated on when Activity terminates, pauses or closes:

    @Override
    protected void onPause() {
        super.onPause();
        mMapView.pause();
    }
    @Override
    protected void onResume() {
        super.onResume();
        mMapView.resume();
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMapView.dispose();
    }

Thank you, Mr. luq, for your guidance.