我在Android上的Google Map v2上加载了很多标记（1700或更多）。我想减少用于创建此地图的内存量，因为它似乎是FC我的2.3 Droid。我想仅在可见屏幕区域内添加点数。
我查看了Google地图扩展程序并看到了这一点：
map.setClustering(new ClusteringSettings().enabled(false).addMarkersDynamically(true));
然而，我的for循环将所有标记添加到地图中。如何设置此选项并仅按此方法添加标记？
这是我的for循环添加标记：
int nsize = visibleMarkers.size();
for (int i = 0; i < nsize; i++) {
MapMarkers marks = new MapMarkers();
String title = visibleMarkers.valueAt(i).getTitle();
String desc = visibleMarkers.valueAt(i).getDesc();
Float latitude = visibleMarkers.valueAt(i).getLat();
Float longitude = visibleMarkers.valueAt(i).getLon();
m = map.addMarker(new MarkerOptions()
.position(new LatLng(latitude, longitude))
.title(title)
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.snotel_marker)));
marks.setTitle(title);
marks.setDesc(desc);
markerInfo.put(m, marks);
map.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
MapMarkers markInfo = markerInfo.get(marker);
Intent i = new Intent(MainActivity.this,
MarkerInformation.class);
i.putExtra("name", markInfo.getTitle()).putExtra(
"description", markInfo.getDesc());
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
});
}
如何仅在显示屏幕区域时添加它们。这会减少我设备上的资源使用吗？
编辑:::这是logcat问题
10-01 10:59:41.590: D/dalvikvm(6488): GC_FOR_MALLOC freed <1K, 55% free 10009K/21895K, external 2433K/2688K, paused 94ms
10-01 10:59:41.691: D/dalvikvm(6488): GC_FOR_MALLOC freed 128K, 55% free 9913K/21895K, external 2433K/2688K, paused 72ms
10-01 10:59:41.793: D/dalvikvm(6488): GC_FOR_MALLOC freed 62K, 55% free 9973K/21895K, external 2433K/2688K, paused 83ms
10-01 10:59:41.910: D/dalvikvm(6488): GC_FOR_MALLOC freed 65K, 55% free 10026K/21895K, external 2433K/2688K, paused 74ms
10-01 10:59:41.988: D/dalvikvm(6488): GC_FOR_MALLOC freed 0K, 54% free 10085K/21895K, external 2433K/2688K, paused 72ms
10-01 10:59:41.988: I/dalvikvm-heap(6488): Grow heap (frag case) to 14.703MB for 60434-byte allocation
10-01 10:59:42.082: D/dalvikvm(6488): GC_FOR_MALLOC freed 0K, 54% free 10144K/21959K, external 2433K/2688K, paused 82ms
10-01 10:59:42.199: D/dalvikvm(6488): GC_FOR_MALLOC freed 138K, 55% free 10043K/21959K, external 2433K/2688K, paused 82ms
10-01 10:59:42.207: I/dalvikvm-heap(6488): Grow heap (frag case) to 14.762MB for 164912-byte allocation
10-01 10:59:42.277: D/dalvikvm(6488): GC_FOR_MALLOC freed 8K, 54% free 10196K/22151K, external 2433K/2688K, paused 68ms
10-01 10:59:42.730: D/dalvikvm(6488): GC_FOR_MALLOC freed 509K, 55% free 10017K/22151K, external 2433K/2688K, paused 72ms
10-01 10:59:42.879: D/dalvikvm(6488): GC_FOR_MALLOC freed 364K, 55% free 10066K/22151K, external 2433K/2688K, paused 78ms
10-01 10:59:42.988: D/dalvikvm(6488): GC_FOR_MALLOC freed 39K, 55% free 10117K/22151K, external 2433K/2688K, paused 82ms
10-01 10:59:42.988: I/dalvikvm-heap(6488): Forcing collection of SoftReferences for 201280-byte allocation
10-01 10:59:43.082: D/dalvikvm(6488): GC_FOR_MALLOC freed 8K, 55% free 10108K/22151K, external 2433K/2688K, paused 86ms
10-01 10:59:43.082: E/dalvikvm-heap(6488): Out of memory on a 201280-byte allocation.
10-01 10:59:43.082: I/dalvikvm(6488): "vts_com.jasonflaherty.snoteldata" prio=5 tid=10 RUNNABLE
10-01 10:59:43.082: I/dalvikvm(6488): | group="main" sCount=0 dsCount=0 obj=0x405c8fe0 self=0x1c1ec0
10-01 10:59:43.082: I/dalvikvm(6488): | sysTid=6533 nice=10 sched=0/0 cgrp=bg_non_interactive handle=1628832
10-01 10:59:43.082: I/dalvikvm(6488): at maps.ao.d.a((null):~-1)
10-01 10:59:43.082: I/dalvikvm(6488): at maps.i.cu.a((null):-1)
10-01 10:59:43.082: I/dalvikvm(6488): at maps.k.ah.a((null):-1)
10-01 10:59:43.082: I/dalvikvm(6488): at maps.k.d.a((null):-1)
10-01 10:59:43.082: I/dalvikvm(6488): at maps.k.g.handleMessage((null):-1)
10-01 10:59:43.082: I/dalvikvm(6488): at android.os.Handler.dispatchMessage(Handler.java:99)
10-01 10:59:43.082: I/dalvikvm(6488): at android.os.Looper.loop(Looper.java:130)
10-01 10:59:43.082: I/dalvikvm(6488): at maps.k.d.c((null):-1)
10-01 10:59:43.082: I/dalvikvm(6488): at maps.k.ag.c((null):-1)
10-01 10:59:43.082: I/dalvikvm(6488): at maps.ao.b.run((null):-1)
10-01 10:59:43.129: W/dalvikvm(6488): threadid=10: thread exiting with uncaught exception (group=0x40015560)
10-01 10:59:43.144: E/AndroidRuntime(6488): FATAL EXCEPTION: vts_com.jasonflaherty.snoteldata
10-01 10:59:43.144: E/AndroidRuntime(6488): java.lang.OutOfMemoryError
10-01 10:59:43.144: E/AndroidRuntime(6488): at maps.ao.d.a(Unknown Source)
10-01 10:59:43.144: E/AndroidRuntime(6488): at maps.i.cu.a(Unknown Source)
10-01 10:59:43.144: E/AndroidRuntime(6488): at maps.k.ah.a(Unknown Source)
10-01 10:59:43.144: E/AndroidRuntime(6488): at maps.k.d.a(Unknown Source)
10-01 10:59:43.144: E/AndroidRuntime(6488): at maps.k.g.handleMessage(Unknown Source)
10-01 10:59:43.144: E/AndroidRuntime(6488): at android.os.Handler.dispatchMessage(Handler.java:99)
10-01 10:59:43.144: E/AndroidRuntime(6488): at android.os.Looper.loop(Looper.java:130)
10-01 10:59:43.144: E/AndroidRuntime(6488): at maps.k.d.c(Unknown Source)
10-01 10:59:43.144: E/AndroidRuntime(6488): at maps.k.ag.c(Unknown Source)
10-01 10:59:43.144: E/AndroidRuntime(6488): at maps.ao.b.run(Unknown Source)
10-01 10:59:43.394: D/dalvikvm(6488): GC_FOR_MALLOC freed 195K, 55% free 10116K/22151K, external 2433K/2688K, paused 153ms
10-01 10:59:43.433: W/ResourceType(6488): getEntry failing because entryIndex 939 is beyond type entryCount 1
10-01 10:59:43.433: W/ResourceType(6488): Failure getting entry for 0x7f0b03ab (t=10 e=939) in package 0 (error -2147483647)
10-01 10:59:43.433: E/GooglePlayServicesUtil(6488): The Google Play services resources were not found. Check your project configuration to ensure that the resources are included.
10-01 10:59:43.769: D/dalvikvm(6488): GC_EXTERNAL_ALLOC freed 115K, 55% free 10102K/22151K, external 2433K/2688K, paused 121ms
10-01 10:59:43.824: E/dalvikvm-heap(6488): 80-byte external allocation too large for this process.
10-01 10:59:43.824: W/OSMemory(6488): External allocation of 80 bytes was rejected
10-01 10:59:43.925: D/dalvikvm(6488): GC_FOR_MALLOC freed <1K, 55% free 10102K/22151K, external 2433K/2688K, paused 101ms
10-01 10:59:44.019: W/dalvikvm(6488): threadid=17: thread exiting with uncaught exception (group=0x40015560)
10-01 10:59:44.027: I/Process(6488): Sending signal. PID: 6488 SIG: 9
答案 0 :(得分：2)
如何设置此选项并仅按此方法添加标记？
map.setClustering(new ClusteringSettings().enabled(false).addMarkersDynamically(true));
方法就是这样做的。仅向地图添加可见区域中的Marker个。它外面的所有标记都由Extensions lib保存，但是没有进行进程间通信以便将它们放在地图上。当用户滚动显示不同的区域时，将添加它们。
如果您认为地图有问题，我首先要尝试的是使用默认标记图标或仅为所有BitmapDescriptor创建一个Marker：
BitmapDescriptor icon = BitmapDescriptorFactory.fromResource(R.drawable.snotel_marker));
for (int i = 0; i < nsize; i++) {
// ...
m = map.addMarker(new MarkerOptions()
.position(new LatLng(latitude, longitude))
.title(title)
.icon(icon);
// ...
}
这应解决OutOfMemoryError问题。
除此之外，您不希望在循环中调用setOnInfoWindowClickListener。一次绰绰有余。
还有一件事：如果您希望保留所有数据，则可以使用MarkerOptions.snippet和Marker.getSnippet作为String desc。无需在Map<Marker, MapMarkers>数据结构中保留所有内容。如果您想在两个String和LatLng旁边保留其他数据，建议您在扩展程序lib中使用MarkerOptions.data(marks)（自1.6开始）或Marker.setData(marks)。稍后在OnInfoWindowClickListener回调中阅读：
MapMarkers marks = (MapMarkers) marker.getData();