我有一个非常简单的活动,如下所示:
public class SurvivalActivity extends Activity {
private static final String KEY_LAYOUT_ID = "SurvivalLayoutId";
int mLayoutId;
private static final int[] mSurvivalLayouts = {
R.layout.survival1,
R.layout.survival2,
R.layout.survival3,
};
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Intent i = getIntent();
if (savedInstanceState != null && savedInstanceState.containsKey(KEY_LAYOUT_ID)) {
mLayoutId = savedInstanceState.getInt(KEY_LAYOUT_ID, 0);
} else if (i != null) {
mLayoutId = i.getIntExtra(KEY_LAYOUT_ID, 0);
} else {
mLayoutId = 0;
}
// Layout
setContentView(mSurvivalLayouts[mLayoutId]);
// Title
Util.setTitleFont(this, findViewById(R.id.title));
// "Next" button
final View nextButton = findViewById(R.id.survival_next);
Util.setFont(this, nextButton, "Lobster.ttf");
nextButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(final View v) {
final Intent next = new Intent(SurvivalActivity.this, SurvivalActivity.class);
next.putExtra(KEY_LAYOUT_ID, (mLayoutId + 1) % mSurvivalLayouts.length);
startActivity(next);
finish();
}
});
}
@Override
protected void onSaveInstanceState(final Bundle outState) {
outState.putInt(KEY_LAYOUT_ID, mLayoutId);
}
}
这两个Util.*静态方法只是改变
TextView
的字体。这3个布局都相当简单,让我向您展示第一个:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
style="@style/Title"
android:text="@string/surv1_title" />
<TextView
style="@style/Content"
android:text="@string/surv1_1" />
<ImageView
style="@style/Picture"
android:src="@drawable/surv_crafting" />
<TextView
style="@style/PicLegend"
android:src="@string/surv_crafting_leg" />
<ImageView
style="@style/Picture"
android:src="@drawable/surv_hache" />
<TextView
style="@style/PicLegend"
android:src="@string/surv_hache_leg" />
<ImageView
style="@style/Picture"
android:src="@drawable/surv_pioche" />
<TextView
style="@style/PicLegend"
android:src="@string/surv_pioche_leg" />
<TextView
style="@style/Content"
android:text="@string/surv1_2" />
<ImageView
style="@style/Picture"
android:src="@drawable/surv_charbon" />
<TextView
style="@style/PicLegend"
android:src="@string/surv_charbon_leg" />
<TextView
style="@style/Content"
android:text="@string/surv1_3" />
<ImageView
style="@style/Picture"
android:src="@drawable/surv_torch" />
<TextView
style="@style/PicLegend"
android:src="@string/surv_torch_leg" />
<TextView
style="@style/Content"
android:text="@string/surv1_4" />
<ImageView
style="@style/Picture"
android:src="@drawable/surv_abri" />
<TextView
style="@style/PicLegend"
android:src="@string/surv_abri_leg" />
<TextView
style="@style/Content"
android:text="@string/surv1_5" />
<Button
style="@style/SurvivalBoxNext"
android:text="@string/surv1_next" />
</LinearLayout>
</ScrollView>
正如您所看到的,这只是几个带有图像视图和触发加载下一个活动的按钮的文本视图。
我启动应用程序,它显示第一个屏幕。我向下滚动到按钮,点击,第二个屏幕显示(有些卡顿)。我向下滚动到按钮,点击,然后就完成了。
03-02 16:36:46.488 E/AndroidRuntime(10611): java.lang.RuntimeException: Unable to start activity ComponentInfo{net.bicou.myapp/net.bicou.myapp.SurvivalActivity}: android.view.InflateException: Binary XML file line #72: Error inflating class <unknown>
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.ActivityThread.access$600(ActivityThread.java:122)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.os.Handler.dispatchMessage(Handler.java:99)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.os.Looper.loop(Looper.java:137)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.ActivityThread.main(ActivityThread.java:4340)
03-02 16:36:46.488 E/AndroidRuntime(10611): at java.lang.reflect.Method.invokeNative(Native Method)
03-02 16:36:46.488 E/AndroidRuntime(10611): at java.lang.reflect.Method.invoke(Method.java:511)
03-02 16:36:46.488 E/AndroidRuntime(10611): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-02 16:36:46.488 E/AndroidRuntime(10611): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-02 16:36:46.488 E/AndroidRuntime(10611): at dalvik.system.NativeStart.main(Native Method)
03-02 16:36:46.488 E/AndroidRuntime(10611): Caused by: android.view.InflateException: Binary XML file line #72: Error inflating class <unknown>
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.createView(LayoutInflater.java:606)
03-02 16:36:46.488 E/AndroidRuntime(10611): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
03-02 16:36:46.488 E/AndroidRuntime(10611): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.Activity.setContentView(Activity.java:1835)
03-02 16:36:46.488 E/AndroidRuntime(10611): at net.bicou.myapp.SurvivalActivity.onCreate(SurvivalActivity.java:34)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.Activity.performCreate(Activity.java:4465)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
03-02 16:36:46.488 E/AndroidRuntime(10611): ... 11 more
03-02 16:36:46.488 E/AndroidRuntime(10611): Caused by: java.lang.reflect.InvocationTargetException
03-02 16:36:46.488 E/AndroidRuntime(10611): at java.lang.reflect.Constructor.constructNative(Native Method)
03-02 16:36:46.488 E/AndroidRuntime(10611): at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.view.LayoutInflater.createView(LayoutInflater.java:586)
03-02 16:36:46.488 E/AndroidRuntime(10611): ... 25 more
03-02 16:36:46.488 E/AndroidRuntime(10611): Caused by: java.lang.OutOfMemoryError
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.graphics.Bitmap.nativeCreate(Native Method)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.graphics.Bitmap.createBitmap(Bitmap.java:605)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.graphics.Bitmap.createBitmap(Bitmap.java:551)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:437)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.graphics.BitmapFactory.finishDecode(BitmapFactory.java:524)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:499)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:351)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:773)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.content.res.Resources.loadDrawable(Resources.java:1937)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.widget.ImageView.<init>(ImageView.java:119)
03-02 16:36:46.488 E/AndroidRuntime(10611): at android.widget.ImageView.<init>(ImageView.java:109)
03-02 16:36:46.488 E/AndroidRuntime(10611): ... 28 more
03-02 16:36:46.520 W/ActivityManager( 211): Force finishing activity net.bicou.myapp/.SurvivalActivity
我不明白:
- 为什么之前的活动没有被释放以腾出一些空间
- 为什么我的应用程序占用了如此多的堆(
Grow heap (frag case) to 60.869MB for 3600016-byte allocation
) - 我该如何连续显示包含每个约10个
TextView
和10个ImageView
的3个活动 - 如果我做错了什么,因为我在我的代码中看不到任何错误,但显然有些东西出错了。
谢谢。
编辑:第一个活动的图片大小:
-rw-r--r-- 1 bicou staff 167197 29 fév 16:42 surv_abri.jpg 600x377 px
-rw-r--r-- 1 bicou staff 24658 29 fév 16:42 surv_charbon.png 559x277 px
-rw-r--r-- 1 bicou staff 5285 29 fév 16:42 surv_crafting.png 214x121 px
-rw-r--r-- 1 bicou staff 4190 29 fév 16:42 surv_hache.png 214x121 px
-rw-r--r-- 1 bicou staff 3809 29 fév 16:42 surv_pioche.png 214x121 px
-rw-r--r-- 1 bicou staff 2252 29 fév 16:42 surv_torch.png 215x121 px
第二个活动:
-rw-r--r-- 1 bicou staff 3371 29 fév 16:42 surv_four.png 204x112 px
-rw-r--r-- 1 bicou staff 5059 29 fév 16:42 surv_glass.png 215x122 px
-rw-r--r-- 1 bicou staff 3176 29 fév 16:42 surv_malle.png 204x112 px
-rw-r--r-- 1 bicou staff 2676 29 fév 16:42 surv_pelle.png 204x112 px
-rw-r--r-- 1 bicou staff 167166 29 fév 16:42 surv_repere.png 528x331 px
-rw-r--r-- 1 bicou staff 134706 29 fév 16:42 surv_sand.jpg 854x480 px
第三个活动(崩溃):
-rw-r--r-- 1 bicou staff 58919 29 fév 16:42 surv_1.jpg 600x377 px
-rw-r--r-- 1 bicou staff 51144 29 fév 16:42 surv_2.jpg 600x377 px
-rw-r--r-- 1 bicou staff 46917 29 fév 16:42 surv_3.jpg 600x377 px
-rw-r--r-- 1 bicou staff 53226 29 fév 16:42 surv_4.jpg 600x377 px
-rw-r--r-- 1 bicou staff 37787 29 fév 16:42 surv_5.jpg 600x377 px
-rw-r--r-- 1 bicou staff 31050 29 fév 16:42 surv_6.jpg 600x377 px
-rw-r--r-- 1 bicou staff 38389 29 fév 16:42 surv_7.jpg 600x377 px
-rw-r--r-- 1 bicou staff 44471 29 fév 16:42 surv_8.jpg 600x377 px
还有窗口背景:
-rw-r--r-- 1 bicou staff 30857 29 fév 16:42 background_img.png
编辑:
好的- 我尝试直接从代码中膨胀视图,以便查看是否存在错误的图像。这是我的活动代码(只有变量+ onCreate
,因为其余部分相同)
private static final int[] mTitles = {
R.string.surv1_title, R.string.surv2_title, R.string.surv3_title
};
private static final int[][] mTextViews = {
{ R.string.surv1_1, R.string.surv1_2, R.string.surv1_3, R.string.surv1_4, R.string.surv1_5 },
{ R.string.surv2_1, R.string.surv2_2, R.string.surv2_3, R.string.surv2_4, R.string.surv2_5, R.string.surv2_6 },
{ R.string.surv3_1, R.string.surv3_2, R.string.surv3_3 }
};
private static final int[][] mImageViews = {
{ R.drawable.surv_pioche, R.drawable.surv_crafting, R.drawable.surv_hache, R.drawable.surv_charbon,
R.drawable.surv_torch, R.drawable.surv_abri },
{ R.drawable.surv_malle, R.drawable.surv_four, R.drawable.surv_pelle, R.drawable.surv_repere,
R.drawable.surv_sand, R.drawable.surv_glass },
{ R.drawable.surv_1, R.drawable.surv_2, R.drawable.surv_3, R.drawable.surv_4,
R.drawable.surv_5, R.drawable.surv_6, R.drawable.surv_7, R.drawable.surv_8 },
};
private static final int[] mNextButtons = {
R.string.surv1_next, R.string.surv2_next, R.string.surv3_next
};
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Intent i = getIntent();
if (savedInstanceState != null && savedInstanceState.containsKey(KEY_LAYOUT_ID)) {
mLayoutId = savedInstanceState.getInt(KEY_LAYOUT_ID, 0);
} else if (i != null) {
mLayoutId = i.getIntExtra(KEY_LAYOUT_ID, 0);
} else {
mLayoutId = 0;
}
// Layout
//setContentView(mSurvivalLayouts[mLayoutId]);
LinearLayout ll;
ScrollView sv;
TextView tv;
ImageView iv;
Button b;
sv = new ScrollView(this);
sv.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
ll.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
tv = new TextView(this);
tv.setId(R.id.title);
tv.setText(getString(mTitles[mLayoutId]));
ll.addView(tv);
for (final int textId: mTextViews[mLayoutId]) {
tv = new TextView(this);
tv.setText(getString(textId));
ll.addView(tv);
}
for (final int imgId: mImageViews[mLayoutId]) {
L.i("Creating image: "+imgId);
iv = new ImageView(this);
iv.setImageResource(imgId);
ll.addView(iv);
}
b = new Button(this);
b.setText(getString(mNextButtons[mLayoutId]));
b.setId(R.id.survival_next);
ll.addView(b);
sv.addView(ll);
setContentView(sv);
// Title
Util.setTitleFont(this, findViewById(R.id.title));
// "Next" button
final View nextButton = findViewById(R.id.survival_next);
Util.setFont(this, nextButton, "Lobster.ttf");
nextButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(final View v) {
final Intent next = new Intent(SurvivalActivity.this, SurvivalActivity.class);
next.putExtra(KEY_LAYOUT_ID, (mLayoutId + 1) % mSurvivalLayouts.length);
startActivity(next);
finish();
}
});
}
如您所见,我只是直接填充视图,并且L.i
(它是Log.i(TAG, ...)
的别名)指示了在任何崩溃之前最后一张被填充的ImageView。
我运行了应用程序,看到了第一个活动,然后是第二个。就像以前一样,在加载第三个活动时它崩溃了。在logcat中我看到的最后一个ID是最后一张图片R.drawable.surv_8
。这是一个630x377像素,45千字节的jpeg文件。
我尝试改变视图的顺序,就像这样:
private static final int[][] mImageViews = {
{ R.drawable.surv_pioche, R.drawable.surv_crafting, R.drawable.surv_hache, R.drawable.surv_charbon,
R.drawable.surv_torch, R.drawable.surv_abri },
{ R.drawable.surv_malle, R.drawable.surv_four, R.drawable.surv_pelle, R.drawable.surv_repere,
R.drawable.surv_sand, R.drawable.surv_glass },
{ R.drawable.surv_8, R.drawable.surv_1, R.drawable.surv_2, R.drawable.surv_3, R.drawable.surv_4,
R.drawable.surv_5, R.drawable.surv_6, R.drawable.surv_7, },
};
所以surv_8首先显示。应用程序仍会在最后一张图片(即R.drawable.surv_7)崩溃。因此,这不是一个图像问题。
然后我从mImageViews[2]中删除了一张图片,所以我只有7张图片而不是8张。应用程序按预期工作:活动加载时,当我点击按钮时,我进入下一个图片,当我到达最后一张时,我回到第一张。没有崩溃。
但是我可以告诉你,活动1和活动2仍会保留在内存中。确实,请查看时间:
03-04 15:47:13.685 I/ActivityManager(17430): Displayed net.bicou.myapp/.SurvivalActivity: +2s570ms
03-04 15:47:36.834 I/ActivityManager(17430): Displayed net.bicou.myapp/.SurvivalActivity: +803ms
03-04 15:47:39.756 I/ActivityManager(17430): Displayed net.bicou.myapp/.SurvivalActivity: +1s476ms
03-04 15:47:44.201 I/ActivityManager(17430): Displayed net.bicou.myapp/.SurvivalActivity: +462ms
03-04 15:47:46.717 I/ActivityManager(17430): Displayed net.bicou.myapp/.SurvivalActivity: +474ms
03-04 15:47:48.599 I/ActivityManager(17430): Displayed net.bicou.myapp/.SurvivalActivity: +474ms
加载活动仅需400毫秒,而非1.5-2.5秒。
为什么它会停留在内存中?
=> **我需要在onDestroy()
手动释放所有图片吗?**
=> 您认为这个怎么样:http://androidactivity.wordpress.com/2011/09/24/solution-for-outofmemoryerror-bitmap-size-exceeds-vm-budget/
使用此解决方案,我可以全局加载大约10个位图,并在加载另一个活动时释放其中一些吗?