發佈未知位圖參考

Question

我試圖在Google Maps v2中設置標記的圖標。 我正在通過網絡下載一些圖片，並在代碼中更改它們的背景。之後，我將它們設置爲標記圖標。第一次創建地圖時，它可以正常工作，但旋轉後會出現異常。

Android版本我跑這：4.3

我的代碼如下：

 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; 
} 

堆棧跟蹤如下：

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

找到解決方案。我在重新加載之前檢查位圖是否駐留在緩存中，但我忘記檢查緩存命中。現在我修改了代碼，它不再崩潰。我無法弄清崩潰的確切原因，可能是一些愚蠢的垃圾收集問題。

這裏是修改後的代碼，其不再崩潰：

 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)); 
         } 
        }); 
     } 

Answer 2

我有類似的問題，當我試圖重新加載標記執行「myMarker.setIcon（）」然後後一些刷新該應用跑進一個「java.lang.IllegalArgumentException：釋放未知的位圖參考」。

我發現調用「myMap.clear（）」清理所有標記是問題，事實上在函數文檔中，您可以讀取「從地圖中刪除所有標記，多義線，多邊形，疊加等。」。 。

好了，「等」，似乎這樣做，因爲我預期更多...

爲了解決我用一個自定義的功能，通過保存在一個HashMap和消除一個個都我的標記進行迭代，這是所有，在我的代碼中沒有更多的例外。

您可以通過所有標記迭代如下將其刪除：

/** 
* 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...) 
    } 
}