我发现了一些事实/发现:
- 到目前为止,这个问题只出现在运行Android 4.0.3的Galaxy Nexus上。我无法在Nexus S(4.1.1)和Galaxy S II(2.3.3)上重现它。
- 屏幕方向不会改变。实际上,我的大多数活动都被锁定为纵向。
- 仅仅为了好玩,我在打开新活动时添加了调用
finish()
,这样就不会有超过一个活动在内存中。验证了onDestroy
正在被调用。
@Override
public void onDestroy()
{
super.onDestroy();
cleanupDrawables(contentView);
// null all the fields referencing views and drawables
System.gc();
}
其中cleanupDrawables()
是:
protected static void cleanupDrawables(View view)
{
cleanupDrawable(view.getBackground());
if (view instanceof ImageView)
cleanupDrawable(((ImageView)view).getDrawable());
else if (view instanceof TextView)
{
TextView tv = (TextView)view;
Drawable[] compounds = tv.getCompoundDrawables();
for (int i = 0; i < compounds.length; i++)
cleanupDrawable(compounds[i]);
}
else if (view instanceof ViewGroup && !(view instanceof AdapterView))
{
ViewGroup vg = (ViewGroup)view;
for (int i = 0; i < vg.getChildCount(); i++)
cleanupDrawables(vg.getChildAt(i));
vg.removeAllViews();
}
}
protected static void cleanupDrawable(Drawable d)
{
if (d == null)
return;
d.setCallback(null);
if (d instanceof BitmapDrawable)
((BitmapDrawable)d).getBitmap().recycle();
else if (d instanceof LayerDrawable)
{
LayerDrawable layers = (LayerDrawable)d;
for (int i = 0; i < layers.getNumberOfLayers(); i++)
cleanupDrawable(layers.getDrawable(i));
}
}
查看Eclipse堆分析器,内存似乎是稳定的,即某些活动占用的内存比其他活动多,但在关闭后会释放,并且随着时间的推移似乎保持稳定。
根据SO上相关答案,图像存储在本地内存中,但this这个人声称自Android 3以来应该存储在堆中,因此如果确实存在图像内存泄漏,我应该看到内存增加。
我的努力的结果是,我仍然会出现内存不足错误,尽管不像之前那样快。在错误发生之前,我开始看到可见的位图损坏,而在添加了cleanupDrawables()
代码之前并没有这种情况。我推断调用Bitmap.recycle()
导致了损坏,尽管这段代码仅在onDestroy
中调用。损坏出现在既是许多活动常见样式一部分的位图上,也出现在仅在一个活动中显示的位图上。
简而言之,我的调查结果相当不确定。此时我不知道还有什么别的方法可尝试。
参考错误堆栈跟踪:
08-22 10:49:51.889: E/AndroidRuntime(31697): java.lang.RuntimeException: Unable to start activity ComponentInfo{klick.beatbleeds/klick.beatbleeds.Bleeds}: android.view.InflateException: Binary XML file line #67: Error inflating class <unknown>
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.app.ActivityThread.access$600(ActivityThread.java:122)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.os.Handler.dispatchMessage(Handler.java:99)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.os.Looper.loop(Looper.java:137)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.app.ActivityThread.main(ActivityThread.java:4340)
08-22 10:49:51.889: E/AndroidRuntime(31697): at java.lang.reflect.Method.invokeNative(Native Method)
08-22 10:49:51.889: E/AndroidRuntime(31697): at java.lang.reflect.Method.invoke(Method.java:511)
08-22 10:49:51.889: E/AndroidRuntime(31697): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
08-22 10:49:51.889: E/AndroidRuntime(31697): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
08-22 10:49:51.889: E/AndroidRuntime(31697): at dalvik.system.NativeStart.main(Native Method)
08-22 10:49:51.889: E/AndroidRuntime(31697): Caused by: android.view.InflateException: Binary XML file line #67: Error inflating class <unknown>
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.LayoutInflater.createView(LayoutInflater.java:606)
08-22 10:49:51.889: E/AndroidRuntime(31697): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
08-22 10:49:51.889: E/AndroidRuntime(31697): at klick.beatbleeds.ActivityBase.setContentView(ActivityBase.java:82)
08-22 10:49:51.889: E/AndroidRuntime(31697): at klick.beatbleeds.Bleeds.onCreate(Bleeds.java:40)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.app.Activity.performCreate(Activity.java:4465)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
08-22 10:49:51.889: E/AndroidRuntime(31697): ... 11 more
08-22 10:49:51.889: E/AndroidRuntime(31697): Caused by: java.lang.reflect.InvocationTargetException
08-22 10:49:51.889: E/AndroidRuntime(31697): at java.lang.reflect.Constructor.constructNative(Native Method)
08-22 10:49:51.889: E/AndroidRuntime(31697): at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.LayoutInflater.createView(LayoutInflater.java:586)
08-22 10:49:51.889: E/AndroidRuntime(31697): ... 23 more
08-22 10:49:51.889: E/AndroidRuntime(31697): Caused by: java.lang.OutOfMemoryError
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.graphics.Bitmap.nativeCreate(Native Method)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.graphics.Bitmap.createBitmap(Bitmap.java:605)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.graphics.Bitmap.createBitmap(Bitmap.java:551)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:437)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.graphics.BitmapFactory.finishDecode(BitmapFactory.java:524)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:499)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:351)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:773)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.content.res.Resources.loadDrawable(Resources.java:1937)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.View.<init>(View.java:2780)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.view.ViewGroup.<init>(ViewGroup.java:385)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.widget.LinearLayout.<init>(LinearLayout.java:174)
08-22 10:49:51.889: E/AndroidRuntime(31697): at android.widget.LinearLayout.<init>(LinearLayout.java:170)
08-22 10:49:51.889: E/AndroidRuntime(31697): ... 26 more
这是一个视图的截图,以便了解此处使用了多少图像。