google maps api v2内存不足错误

时间:2015-05-14 08:25:02

标签: android bitmap out-of-memory google-maps-android-api-2 markerclusterer

我的应用中存在巨大的内存问题。我使用谷歌地图api v2与ClusterManager和自定义标记。我根据每个标记的类别通过调用markerOptions.icon(BitmapDescriptorFactory.fromBitmap(bitmap));来提供图像。问题是:在几次屏幕旋转后,我的应用程序因OOM错误而崩溃:

05-14 11:04:12.692  14020-30201/rokask.rideabike E/art﹕ Throwing OutOfMemoryError "Failed to allocate a 4194316 byte allocation with 1627608 free bytes and 1589KB until OOM"
05-14 11:04:12.722  14020-30201/rokask.rideabike E/AndroidRuntime﹕ FATAL EXCEPTION: GLThread 19179
Process: rokask.rideabike, PID: 14020
java.lang.OutOfMemoryError: Failed to allocate a 4194316 byte allocation with 1627608 free bytes and 1589KB until OOM
        at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
        at android.graphics.Bitmap.nativeCreate(Native Method)
        at android.graphics.Bitmap.createBitmap(Bitmap.java:939)
        at android.graphics.Bitmap.createBitmap(Bitmap.java:912)
        at android.graphics.Bitmap.createBitmap(Bitmap.java:879)
        at com.google.maps.api.android.lib6.gmm6.n.c.i.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.c.l.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.c.l.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.c.l.b(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.c.b.ak.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.c.b.as.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.x.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.l.a(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.l.b(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.cv.f(Unknown Source)
        at com.google.maps.api.android.lib6.gmm6.n.cv.run(Unknown Source)

我有LruCacheBitmap对象,这意味着我不会重新创建它们,而是重用它们。我可以清楚地看到每个Bitmap对象都是从缓存中获取的,而不是从其他地方获取的。但是,如果Bitmap尚未在缓存中(首次加载),我会从我应用的内部存储中加载它,但只有在Bitmap第一次加盖时才会感到高兴。我将LruCache的实例保留在保留的Fragment实例中,并在每次重新创建DefaultClusterRenderer<MyObject>时将其传递给我的自定义Activity对象,并且需要重新绘制地图。

这是我的DefaultClusterRenderer<MyItem>扩展程序:

public class DotRenderer extends DefaultClusterRenderer<Dot> {
private final String internalStorageDir;
private final LruCache<String, Bitmap> lruCache;

public DotRenderer(Context context, GoogleMap googleMap, ClusterManager<Dot> clusterManager,
                   LruCache<String, Bitmap> lruCache, String internalStorageDir)
{
    super(context, googleMap, clusterManager);
    //this.bitmaps = bitmaps;
    this.internalStorageDir = internalStorageDir;
    this.lruCache = lruCache;
}

@Override
protected void onBeforeClusterItemRendered(Dot mapObject, MarkerOptions markerOptions) {
    markerOptions.title(mapObject.getTitle());
    String id = Integer.toString(mapObject.getTypeId());
    //
    Bitmap bitmap = getBitmapFromMemCache(id);
    if (bitmap == null) {
        Log.d(MainActivity.LOG_TAG, "reading bitmap from storage.");
        Map.Entry<String, Bitmap> bitmapEntry
                = BitmapManager.getBitmapFromStorage(internalStorageDir, id);
        if (bitmapEntry != null) {
            markerOptions.icon(BitmapDescriptorFactory.fromBitmap(bitmapEntry.getValue()));
            addBitmapToMemCache(id, bitmapEntry.getValue());
        }
    } else {
        Log.d(MainActivity.LOG_TAG, "reading bitmap from cache.");
        markerOptions.icon(BitmapDescriptorFactory.fromBitmap(bitmap));
    }
}

private void addBitmapToMemCache(String key, Bitmap bitmap) {
    if (getBitmapFromMemCache(key) == null) {
        lruCache.put(key, bitmap);
    }
}

private Bitmap getBitmapFromMemCache(String key) {
    return lruCache.get(key);
}
}

这是我Activity里面的代码,我开始加载地图(每次屏幕方向更改时都会执行此代码):

    ClusterManager<Dot> clusterManager = new ClusterManager<>(this, googleMap);
    clusterManager.setOnClusterItemInfoWindowClickListener(
            new ClusterManager.OnClusterItemInfoWindowClickListener<Dot>() {
                @Override
                public void onClusterItemInfoWindowClick(Dot dot) {
                    int id = dot.getId();
                    String title = dot.getTitle();
                    Log.d(LOG_TAG, "clicked marker with id " + id
                            + " and title " + title + ".");
                    Intent infoWindowActivityIntent =
                            new Intent(MainActivity.this, InfoWindowActivity.class);
                    infoWindowActivityIntent.putExtra("dotId", id);
                    infoWindowActivityIntent.putExtra("dotTitle", title);
                    startActivity(infoWindowActivityIntent);
                }
            });
    googleMap.setOnCameraChangeListener(clusterManager);
    googleMap.setOnInfoWindowClickListener(clusterManager);

    DotRenderer dotRenderer =
            new DotRenderer(getApplicationContext(), googleMap, clusterManager,
                    lruCache, this.getFilesDir().toString());
    clusterManager.setRenderer(dotRenderer);

随着每次屏幕旋转,内存不断增加,我在地图中放大的次数越多(显示的标记越多),当我旋转屏幕直到应用程序崩溃时,我的应用程序堆中添加的内存量就越多。

有时错误与上面的错误不同,但表明OOM发生在DefaultClusterRenderer<MyItam>扩展程序markerOptions.icon(BitmapDescriptorFactory.fromBitmap(bitmap));中的此行。

如果我禁用自定义标记图标(删除所有Bitmap相关代码),内存问题就会消失。请帮助我找出导致此OOM出现的原因。

2 个答案:

答案 0 :(得分:1)

好吧......我认为这应该有用......

每当您想重置地图时添加googleMap.clear()

希望这会对你有所帮助。

答案 1 :(得分:1)

我遇到了这个问题,试图在演示模式下运行应用程序一次几个小时。无论我尝试了什么,30分钟后,我都会看到这个崩溃没有可读的堆栈报告。

我尝试使用System gc(),分离片段,单例活动,将Google Play服务更新到最新版本,清除对叠加层的引用,将地图生命周期附加到活动以及不支持。 经过许多失败的尝试和很多挫折之后,我终于发现了一些有效的方法。这不是地图错误的修复,但它使我的应用程序崩溃:

    <application
    ...
    android:largeHeap="true">