[안드로이드] study day 5

drawble과 drawble v24차이

drawble

• API 24(누가) 이전 버전의 기기 호환

drawble-v24

• API 24(누가) 버전 이상의 기기를 호환

android.view.InflateException: Binary XML file line #53: Error inflating class Button 오류가 떠 검색해본 결과 API 버전이 너무 낮아서 v-24를 사용할 수 없던 것이다.

커스텀 마커 클러스터링

• 커스텀 마커를 클러스터링
  https://hwanine.github.io/android/Google-map4/#changerenderer
  https://milkissboy.tistory.com/36
• 클러스터 커스텀
  https://stackoverflow.com/questions/30967961/android-maps-utils-cluster-icon-color
  https://icevanila.com/question/android-cluster-marker-count-not-showing-properly-with-custom-marker
• ClusterRenderer

	// 마커 커스텀 class
    class CustomIconRenderer extends DefaultClusterRenderer<ClusterData> {
        private final IconGenerator mClusterIconGenerator = new IconGenerator(getApplicationContext());
        Context context;
        public CustomIconRenderer(Context context, GoogleMap map, ClusterManager<ClusterData> clusterManager) {
            super(context, map, clusterManager);
            this.context = context;
        }

        @Override
        protected void onBeforeClusterItemRendered(ClusterData item, MarkerOptions markerOptions) {
            tv_marker.setText(item.gettitle());

            markerOptions.icon(BitmapDescriptorFactory.fromBitmap(createDrawableFromView(context, marker_root_view)));

            super.onBeforeClusterItemRendered(item, markerOptions);
        }

        @Override
        protected void onBeforeClusterRendered(Cluster item, MarkerOptions markerOptions){

            final Drawable clusterIcon = getResources().getDrawable(R.drawable.cluster_background);

            mClusterIconGenerator.setBackground(clusterIcon);
            View clusterView =  LayoutInflater.from(context).inflate(R.layout.clustertext, null, false);
            mClusterIconGenerator.setContentView(clusterView);
            mClusterIconGenerator.makeIcon(String.valueOf(item.getSize()));

            Bitmap icon = mClusterIconGenerator.makeIcon();

            markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
        }

        // View를 Bitmap으로 변환
        private Bitmap createDrawableFromView(Context context, View view) {
            DisplayMetrics displayMetrics = new DisplayMetrics();
            ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
            view.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            view.measure(displayMetrics.widthPixels, displayMetrics.heightPixels);
            view.layout(0, 0, displayMetrics.widthPixels, displayMetrics.heightPixels);
            view.buildDrawingCache();
            Bitmap bitmap = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
            Canvas canvas = new Canvas(bitmap);
            view.draw(canvas);
            return bitmap;
        }
    }

• 클러스터 생성시 주의사항
  클러스터를 해도 기존의 마커가 없어지지 않아 며칠동안 삽질했는데 .. 알고보니 마커를 계속 생성하고있었던거다 ~ 무조건 null 체크를 해주자

if (clusterManager == null){
            clusterManager = new ClusterManager<>(this,map);
            clusterManager.setRenderer(new CustomIconRenderer(this,map,clusterManager));
            getData(type); // cluster.add()
        }

Android:java.lang.OutOfMemoryError

https://stackoverflow.com/questions/32244851/androidjava-lang-outofmemoryerror-failed-to-allocate-a-23970828-byte-allocatio