在Android中加载地图视图时出现内存不足异常

Question

在我的应用程序中，我有一个地图视图，它根据用户的方向旋转。为此，我将地图视图的大小设得非常大，超过了设备的宽度和高度。但是它在设备上运行得很完美，在模拟器上则会出现内存不足异常。我知道这是由于模拟器的堆内存较低引起的。

所有设备都具有更多的堆内存吗？还是有解决方案可以解决这个问题？

我的Locat输出：

07-05 12:32:49.982: E/AndroidRuntime(907): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.graphics.Bitmap.nativeCreate(Native Method)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.graphics.Bitmap.createBitmap(Bitmap.java:468)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.google.android.maps.StreetViewRenderer.generateNewTileImage(StreetViewRenderer.java:120)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.google.android.maps.StreetViewRenderer.renderTile(StreetViewRenderer.java:88)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.google.android.maps.AndroidTileOverlayRenderer.renderTile(AndroidTileOverlayRenderer.java:62)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.google.googlenav.map.Map.drawTile(Unknown Source)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.google.googlenav.map.Map.drawMapBackground(Unknown Source)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.google.googlenav.map.Map.drawMap(Unknown Source)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.google.android.maps.MapView.drawMap(MapView.java:1048)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.google.android.maps.MapView.onDraw(MapView.java:486)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.View.draw(View.java:6740)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.trafficmate.utils.RotateView.dispatchDraw(RotateView.java:48)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.View.draw(View.java:6743)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.widget.FrameLayout.draw(FrameLayout.java:352)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1842)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewRoot.draw(ViewRoot.java:1407)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewRoot.performTraversals(ViewRoot.java:1163)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.os.Handler.dispatchMessage(Handler.java:99)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.os.Looper.loop(Looper.java:123)
07-05 12:32:49.982: E/AndroidRuntime(907):  at android.app.ActivityThread.main(ActivityThread.java:4627)
07-05 12:32:49.982: E/AndroidRuntime(907):  at java.lang.reflect.Method.invokeNative(Native Method)
07-05 12:32:49.982: E/AndroidRuntime(907):  at java.lang.reflect.Method.invoke(Method.java:521)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-05 12:32:49.982: E/AndroidRuntime(907):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-05 12:32:49.982: E/AndroidRuntime(907):  at dalvik.system.NativeStart.main(Native Method)

我使用了旋转视图和扩展视图组的RotateView。

在RotateView的onMeasure方法中。

private static final float SQ2 = 3.5f;
  @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int w = getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec);
        int h = getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec);
       //int w=SonarView.display.getWidth();
       //int h=SonarView.display.getHeight();
        int sizeSpec;
        if (w > h) {
            sizeSpec = MeasureSpec.makeMeasureSpec((int) (w * SQ2), MeasureSpec.EXACTLY);
        } else {
            sizeSpec = MeasureSpec.makeMeasureSpec((int) (h * SQ2), MeasureSpec.EXACTLY);
        }
        final int count = getChildCount();
        for (int i = 0; i < count; i++) {
            getChildAt(i).measure(sizeSpec, sizeSpec);
        }
        Log.e("sizeSpec",""+sizeSpec);

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

我的布局是：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
>
<com.trafficmate.utils.RotateView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/rview"
 >
<com.google.android.maps.MapView 
android:id="@+id/mapview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:apiKey="0947Aqi7xG3QScZEvvOLtLJNtVss6PFjAquxZ2w"
android:clickable="true" 
android:saveEnabled="true"
/>

</com.trafficmate.utils.RotateView>

</FrameLayout>

- koti

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需要完整的logcat输出。 - Paresh Mayani

粘贴您的代码和日志输出。 - Deepak Swami

我们需要查看您的代码以找到错误。请发布您的代码和logcat错误详细信息。 - Andro Selva

这位仁兄似乎知道如何增加模拟器堆大小：http://rootzwiki.com/topic/9158-how-to-change-vm-heap-size/。然而，这只是掩盖你正在面临的真正问题。我敢打赌代码可以优化。 - Alehar

Answer 1

您可以通过在应用程序标签中添加android:largeHeap="true"来增加堆大小。模拟器对于常规堆和大堆具有相同的堆大小，因此您需要在设备上进行检查。

通过ActivityManager.getLargeMemoryClass()进行检查。

- user1503346

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这是最好的解决方案吗？ - koti

我认为android:largeheap="true"仅支持从3.0开始。 - dharan