java.lang.OutOfMemoryError 有音频流
java.lang.OutOfMemoryError with Audio Stream
我是 Android 和 Java 的初学者。我开发了这个简单的应用程序来传输音频，但它总是意外崩溃。 Android Studio 没有抛出任何错误，到目前为止我还没弄明白。
这是我的代码：
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.jacob.wutk" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity android:name=".radio" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>
activity_radio.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.jacob.wutk.radio"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/imageView"
android:layout_gravity="center"
android:src="@drawable/background"
android:scaleType="centerCrop"/>
<LinearLayout
android:paddingLeft="4.0dip"
android:paddingTop="5.0dip"
android:paddingRight="4.0dip"
android:paddingBottom="1.0dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:id="@+id/play"
android:layout_width="0.0dip"
android:layout_height="wrap_content"
android:src="@drawable/play"
android:background="?android:selectableItemBackground"
android:layout_weight="1.0"
android:scaleType="fitCenter"
android:clickable="true"
android:onClick="playMusic"/>
<ImageButton
android:id="@+id/pause"
android:layout_width="0.0dip"
android:layout_height="fill_parent"
android:src="@drawable/pause"
android:background="?android:selectableItemBackground"
android:layout_weight="1.0"
android:scaleType="fitCenter"
android:clickable="true"
android:onClick="pauseMusic"/>
</LinearLayout>
</FrameLayout>
radio.java
public class radio extends AppCompatActivity {
/** Called when the user touches the button */
public void playMusic(View view) throws IOException {
String url = "http://streamer.cci.utk.edu:8000/wutk-vorbis"; // your URL here
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(url);
mediaPlayer.prepare(); // might take long! (for buffering, etc)
mediaPlayer.start();
}
public void pauseMusic(MediaPlayer mediaPlayer) {
mediaPlayer.pause();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_radio);
}
}
崩溃日志。
--------- beginning of crash
07-13 09:34:35.175 2764-2764/com.example.jacob.wutk E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.jacob.wutk, PID: 2764
java.lang.OutOfMemoryError: Failed to allocate a 579537516 byte allocation with 1048576 free bytes and 382MB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:1080)
at android.content.res.Resources.loadDrawableForCookie(Resources.java:2635)
at android.content.res.Resources.loadDrawable(Resources.java:2540)
at android.content.res.TypedArray.getDrawable(TypedArray.java:870)
at android.widget.ImageView.<init>(ImageView.java:152)
at android.widget.ImageView.<init>(ImageView.java:140)
at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:57)
at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:53)
at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:106)
at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:980)
at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:1039)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:746)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.jacob.wutk.radio.onCreate(radio.java:30)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
07-13 09:34:42.066 2764-2764/com.example.jacob.wutk I/Process: Sending signal. PID: 2764 SIG: 9
OutOfMemoryError 异常的原因是因为您在 xml 布局 'activity_radio.xml' 中将大位图设置为 ImageView 的源。当布局在您的 Activity/Fragment 中膨胀时，ImageView 试图在内存中以其完整大小加载 'src' 图像，这可能看起来并不大，但系统可能没有适当的内存来容纳它。
解决此问题的方法是删除设置图像的 xml 代码内部，而是按需在 activity/fragment 内部按比例加载图像 down/up 以正确适合您的设备配置。
link Android 开发者网站上的一篇文章讨论了如何正确加载缩放位图。请记住，您希望在后台线程中处理位图的加载和缩放，以免阻塞您的 UI 线程，否则您会得到另一个异常。
我是 Android 和 Java 的初学者。我开发了这个简单的应用程序来传输音频，但它总是意外崩溃。 Android Studio 没有抛出任何错误，到目前为止我还没弄明白。
这是我的代码：
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.jacob.wutk" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity android:name=".radio" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>
activity_radio.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.jacob.wutk.radio"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/imageView"
android:layout_gravity="center"
android:src="@drawable/background"
android:scaleType="centerCrop"/>
<LinearLayout
android:paddingLeft="4.0dip"
android:paddingTop="5.0dip"
android:paddingRight="4.0dip"
android:paddingBottom="1.0dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:id="@+id/play"
android:layout_width="0.0dip"
android:layout_height="wrap_content"
android:src="@drawable/play"
android:background="?android:selectableItemBackground"
android:layout_weight="1.0"
android:scaleType="fitCenter"
android:clickable="true"
android:onClick="playMusic"/>
<ImageButton
android:id="@+id/pause"
android:layout_width="0.0dip"
android:layout_height="fill_parent"
android:src="@drawable/pause"
android:background="?android:selectableItemBackground"
android:layout_weight="1.0"
android:scaleType="fitCenter"
android:clickable="true"
android:onClick="pauseMusic"/>
</LinearLayout>
</FrameLayout>
radio.java
public class radio extends AppCompatActivity {
/** Called when the user touches the button */
public void playMusic(View view) throws IOException {
String url = "http://streamer.cci.utk.edu:8000/wutk-vorbis"; // your URL here
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(url);
mediaPlayer.prepare(); // might take long! (for buffering, etc)
mediaPlayer.start();
}
public void pauseMusic(MediaPlayer mediaPlayer) {
mediaPlayer.pause();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_radio);
}
}
崩溃日志。
--------- beginning of crash
07-13 09:34:35.175 2764-2764/com.example.jacob.wutk E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.jacob.wutk, PID: 2764
java.lang.OutOfMemoryError: Failed to allocate a 579537516 byte allocation with 1048576 free bytes and 382MB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:1080)
at android.content.res.Resources.loadDrawableForCookie(Resources.java:2635)
at android.content.res.Resources.loadDrawable(Resources.java:2540)
at android.content.res.TypedArray.getDrawable(TypedArray.java:870)
at android.widget.ImageView.<init>(ImageView.java:152)
at android.widget.ImageView.<init>(ImageView.java:140)
at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:57)
at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:53)
at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:106)
at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:980)
at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:1039)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:746)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.jacob.wutk.radio.onCreate(radio.java:30)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
07-13 09:34:42.066 2764-2764/com.example.jacob.wutk I/Process: Sending signal. PID: 2764 SIG: 9
OutOfMemoryError 异常的原因是因为您在 xml 布局 'activity_radio.xml' 中将大位图设置为 ImageView 的源。当布局在您的 Activity/Fragment 中膨胀时，ImageView 试图在内存中以其完整大小加载 'src' 图像，这可能看起来并不大，但系统可能没有适当的内存来容纳它。
解决此问题的方法是删除设置图像的 xml 代码内部，而是按需在 activity/fragment 内部按比例加载图像 down/up 以正确适合您的设备配置。
link Android 开发者网站上的一篇文章讨论了如何正确加载缩放位图。请记住，您希望在后台线程中处理位图的加载和缩放，以免阻塞您的 UI 线程，否则您会得到另一个异常。