android: MapView加载多个 overlay 内存溢出

最新推荐文章于 2024-10-23 15:34:52 发布

iteye_18365

最新推荐文章于 2024-10-23 15:34:52 发布

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文章标签：移动开发

本文介绍了一种解决地图应用程序中因加载多个overlay导致内存溢出的问题。通过捕获异常并适时调用垃圾回收机制来避免内存溢出错误，同时提供了具体的代码实现。

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下文转自：

http://wang-peng1.iteye.com/blog/668166

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今天测试了一下地图加载多个不同overlay，结果溢出其实也不大16*16 总过18个

结果内存移除"out of memory".搜索了一下有个人也遇到过他的解决办法就是捕获溢出的异常

mapView. setBuiltInZoomControls ( true );
ZoomButtonsController zoomctrl = mapView . getZoomButtonsController ();
zoomctrl . setAutoDismissed ( false ); //自动隐藏关闭
zoomctrl . setVisible ( true );
zoomctrl . setOnZoomListener ( new ZoomButtonsController . OnZoomListener () {

public void onZoom ( boolean zoomIn ) {
// TODO Auto-generated method stub
try {
Log . i ( TAG , "OnZoomListener" );
System . gc ();
if ( zoomIn )
{
mc . zoomIn ();
}
else
{
mc . zoomOut ();
}
System . gc ();
}
catch ( OutOfMemoryError e )
{
e . printStackTrace ();
Log . e ( TAG , e . toString ());
Toast . makeText ( GoogleMap . this , e . toString (), Toast . LENGTH_LONG );
}
catch ( Exception e )
{
Log . w ( TAG , e . toString ());
Toast . makeText ( GoogleMap . this , e . toString (), Toast . LENGTH_LONG );
}
}

public void onVisibilityChanged ( boolean visible ) {
// TODO Auto-generated method stub

}
});

private boolean myDoubleTouch ( float x , float y , MapView mapView )
{
Log . i ( mParent . TAG , "myDoubleTouch: " + x + "," + y );
try
{
mapView . getController (). zoomInFixing (( int ) x , ( int ) y );
}
catch ( OutOfMemoryError e )
{
System . gc ();
e . printStackTrace ();
Log . e ( mParent . TAG , e . toString ());
Toast . makeText ( m_mapview . getContext (), e . toString (), Toast . LENGTH_LONG );
}
catch ( Exception e )
{
Log . w ( mParent . TAG , e . toString ());
Toast . makeText ( m_mapview . getContext (), e . toString (), Toast . LENGTH_LONG );
}

return true ;
}