Question

我正在尝试在Google Maps v2中设置标记的图标。我正在通过网络下载一些图像并在代码中更改其背景。之后我将它们设置为标记的图标。在第一次创建地图时，它可以正常工作，但在轮换后有一个例外。

Android版本我运行：4.3

我的代码如下：

        UrlImageViewHelper.loadUrlDrawable(TuvaletlerMapActivity.this,
                iconUrl, new UrlImageViewCallback() {

                    @Override
                    public void onLoaded(ImageView iv, Bitmap bm,
                            String arg2, boolean arg3) {
                        Bitmap bitmap = VenuesHelper.iconizeBitmap(bm);
                        marker.setIcon(BitmapDescriptorFactory
                                .fromBitmap(bitmap));
                    }
                });

和VenuesHelper.iconizeBitmap()如下：

public static Bitmap iconizeBitmap(Bitmap bm) {
    Bitmap bitmap = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(),
            bm.getConfig());
    Canvas canvas = new Canvas(bitmap);
    canvas.drawColor(Color.parseColor("#33B5E5"));
    canvas.drawBitmap(bm, 0, 0, null);
    return bitmap;
}

堆栈跟踪如下：

08-07 10:16:50.684: E/AndroidRuntime(19001): FATAL EXCEPTION: main
08-07 10:16:50.684: E/AndroidRuntime(19001): java.lang.IllegalArgumentException: Released unknown bitmap reference
08-07 10:16:50.684: E/AndroidRuntime(19001):    at maps.as.i.a(Unknown Source)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at maps.ah.o.b(Unknown Source)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at maps.ah.bn.a(Unknown Source)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at bix.onTransact(SourceFile:204)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at android.os.Binder.transact(Binder.java:347)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at com.google.android.gms.internal.dm$a$a.f(Unknown Source)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at com.google.android.gms.maps.model.Marker.setIcon(Unknown Source)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at com.behlul.tuvaletbul.TuvaletlerMapActivity$TuvaletliYukleCallbacks$1.onLoaded(TuvaletlerMapActivity.java:250)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at com.koushikdutta.urlimageviewhelper.UrlImageViewHelper$2.run(UrlImageViewHelper.java:615)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at com.koushikdutta.urlimageviewhelper.UrlImageViewHelper$3.onPostExecute(UrlImageViewHelper.java:653)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at com.koushikdutta.urlimageviewhelper.UrlImageViewHelper$3.onPostExecute(UrlImageViewHelper.java:1)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at android.os.AsyncTask.finish(AsyncTask.java:631)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at android.os.AsyncTask.access$600(AsyncTask.java:177)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at android.os.Handler.dispatchMessage(Handler.java:99)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at android.os.Looper.loop(Looper.java:137)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at android.app.ActivityThread.main(ActivityThread.java:5103)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at java.lang.reflect.Method.invokeNative(Native Method)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at java.lang.reflect.Method.invoke(Method.java:525)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-07 10:16:50.684: E/AndroidRuntime(19001):    at dalvik.system.NativeStart.main(Native Method)

Answer 1

我遇到了类似的问题，当我尝试重新加载执行“myMarker.setIcon（）”的Marker时，经过一些刷新后，应用程序遇到了“java.lang.IllegalArgumentException：Released unknown bitmap reference”。

我发现调用“myMap.clear（）”来清除所有标记是问题所在。实际上在函数文档中你可以读到“从地图中删除所有标记，折线，多边形，叠加等”。

嗯，“等”似乎按照我的预期做了更多...

为了解决这个问题，我使用了一个自定义函数来遍历HashMap中保存的所有标记并逐个删除，这就是我的代码中没有更多例外情况。

您可以迭代所有标记以删除它们，如下所示：

/**
 * Alternative to myMap.clear() to avoid undesired exceptions
 */
private void clearAllMapMarkers() {
    // Clearing the current map markers being shown
    // Note that we do not use myMap.clear() because that incur in the exception
    // "java.lang.IllegalArgumentException: Released unknown bitmap reference"
    try {
        for (Map.Entry<String, Marker> markerEntry : mMarkerList.entrySet()) {
            markerEntry.getValue().remove();
        }
    } catch (IllegalArgumentException e) {
        // Manage here the exception (never raised but who knows...)
    }
}

Answer 2

找到解决方案。我在重新加载之前检查位图是否驻留在缓存中，但我忘记检查缓存命中。现在我修改了代码，它不再崩溃。我无法弄清楚崩溃的确切原因，可能是一些愚蠢的垃圾收集问题。

以下是不再崩溃的修改后的代码：

        Bitmap icon = UrlImageViewHelper.getCachedBitmap(iconUrl);
        if (icon != null) {
            marker.setIcon(BitmapDescriptorFactory
                    .fromBitmap(VenuesHelper.iconizeBitmap(icon)));
        } else { //Added this else
            UrlImageViewHelper.loadUrlDrawable(
                    TuvaletlerMapActivity.this, iconUrl,
                    new UrlImageViewCallback() {

                        @Override
                        public void onLoaded(ImageView iv, Bitmap bm,
                                String arg2, boolean arg3) {
                            Bitmap bitmap = VenuesHelper
                                    .iconizeBitmap(bm);
                            marker.setIcon(BitmapDescriptorFactory
                                    .fromBitmap(bitmap));
                        }
                    });
        }

发布了未知的位图参考

2 个答案: