android - 为什么我在简单地执行 setContentView(R.layout.somelayout) 时会出现内存泄漏？

Question

在我的 onCreate() 中，我只是使用 xml 作为 Activity 的内容 View 。为什么我会发生内存泄漏。是我做错了什么吗？

我的 xml 只有 5 个图像按钮，每个图像按钮都有一个 statelistdrawable(选择器)。每张图片只有 16kb 大小。 (所以我使用了 10 张图像——每个按钮的按下状态图像和正常状态图像)。

在我的 Activity 中我没有使用 LayoutInflator..当从 xml 设置内容 View 时，android 不应该自己回收 bimaps 吗？

我收到类似这样的错误:

02-17 09:18:39.797: ERROR/AndroidRuntime(372): Uncaught handler: thread main exiting due to uncaught exception
02-17 09:18:39.817: ERROR/AndroidRuntime(372): java.lang.RuntimeException: Unable to start activity ComponentInfo{***.***.*****.activity/***.***.*****.home.HomeScreenActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class java.lang.reflect.Constructor
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2401)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.app.ActivityThread.access$2100(ActivityThread.java:116)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.os.Looper.loop(Looper.java:123)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.app.ActivityThread.main(ActivityThread.java:4203)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at java.lang.reflect.Method.invokeNative(Native Method)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at java.lang.reflect.Method.invoke(Method.java:521)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at dalvik.system.NativeStart.main(Native Method)
02-17 09:18:39.817: ERROR/AndroidRuntime(372): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class java.lang.reflect.Constructor
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.LayoutInflater.createView(LayoutInflater.java:512)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:562)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.LayoutInflater.inflate(LayoutInflater.java:385)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:313)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.app.Activity.setContentView(Activity.java:1620)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at ***.***.*****.home.HomeScreenActivity.onCreate(HomeScreenActivity.java:35)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     ... 11 more
02-17 09:18:39.817: ERROR/AndroidRuntime(372): Caused by: java.lang.reflect.InvocationTargetException
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.widget.RelativeLayout.<init>(RelativeLayout.java:171)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at java.lang.reflect.Constructor.constructNative(Native Method)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.LayoutInflater.createView(LayoutInflater.java:499)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     ... 21 more
02-17 09:18:39.817: ERROR/AndroidRuntime(372): Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:439)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:322)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:688)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.content.res.Resources.loadDrawable(Resources.java:1710)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.content.res.TypedArray.getDrawable(TypedArray.java:548)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.View.<init>(View.java:1846)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.View.<init>(View.java:1795)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     at android.view.ViewGroup.<init>(ViewGroup.java:282)
02-17 09:18:39.817: ERROR/AndroidRuntime(372):     ... 25 more

我替换了图像，并且代码在应用程序没有挂起的情况下工作，但是我的 ddms 日志仍然因以下错误而变得疯狂:

02-17 09:18:37.287: ERROR/(372): VM won't let us allocate 270000 bytes
02-17 09:18:37.287: ERROR/dalvikvm-heap(372): 270000-byte external allocation too large for this process.
02-17 09:18:37.287: ERROR/(372): VM won't let us allocate 270000 bytes
02-17 09:18:37.287: ERROR/dalvikvm-heap(372): 270000-byte external allocation too large for this process.
02-17 09:18:37.287: ERROR/(372): VM won't let us allocate 270000 bytes
02-17 09:18:37.287: ERROR/dalvikvm-heap(372): 270000-byte external allocation too large for this process.
02-17 09:18:37.287: ERROR/(372): VM won't let us allocate 270000 bytes
02-17 09:18:37.287: ERROR/dalvikvm-heap(372): 264600-byte external allocation too large for this process.

......

虽然该应用程序正在运行，但我想知道我做错了什么。还是有问题的 android 系统中的错误？

附上代码:

public class VirtualHomeActivity extends Activity  {

    ImageButton imgbtn1, imgbtn2, imgbtn3, imgbtn4,
            imgbtn5;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
        setContentView(R.layout.home);
}
}

布局home.xml:

<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout android:id="@+id/RelativeLayout01"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layoutAnimation="@anim/home_screen_animation_controller" android:background="@drawable/bg_application">

    <ImageButton android:id="@+id/imgBtn1"
        android:layout_width="340dip" android:scaleType="fitCenter" android:layout_height="100dip" android:layout_marginLeft="20dip" android:layout_marginTop="5dip" android:background="@drawable/custombutton1"></ImageButton>
    <ImageButton android:layout_below="@id/imgBtn1"
        android:id="@+id/imgBtn2" android:layout_width="340dip" android:scaleType="fitCenter" android:layout_height="100dip" android:layout_marginTop="5dip" android:layout_marginLeft="20dip" android:background="@drawable/custombutton2"></ImageButton>
    <ImageButton android:layout_below="@id/imgBtn2      android:id="@+id/imgBtn3" android:scaleType="fitCenter" android:layout_width="340dip" android:layout_height="100dip" android:layout_marginLeft="20dip" android:layout_marginTop="5dip" android:background="@drawable/custombutton3"></ImageButton>
<ImageButton android:layout_below="@id/imgBtnS3" android:id="@+id/imgBtn4" android:scaleType="fitCenter" android:layout_height="100dip" android:layout_width="340dip" android:layout_marginLeft="20dip" android:layout_marginTop="5dip" android:background="@drawable/custombutton4"></ImageButton>
<ImageButton android:layout_below="@id/imgBtn4"
    android:id="@+id/imgBtn5" android:scaleType="fitCenter"
    android:layout_height="100dip" android:layout_width="340dip"
    android:layout_marginLeft="20dip" android:layout_marginTop="5dip" android:background="@drawable/custombutton5"></ImageButton>
</RelativeLayout>

选择器是:(custombutton1.xml)

<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@drawable/img_clicked" />
    <item android:drawable="@drawable/img_unclicked" /> </selector>

我从 Activity 中删除了所有其他代码，以检查我是否正在造成内存泄漏。但是在这里我只是将内容 View 设置为我的布局文件，但我的 ddms 仍然说 VM 不会让我们分配 270000 字节

我不认为我试图在这里管理任何 Activity 生命周期。

Answer 1

您的内存泄漏可能在其他地方，也许在您管理 Activity 生命周期更改的方式中。看文章Avoiding Memory Leaks .