我得到了一个TransactionTooLargeException。无法复制的。文件里说
The Binder transaction failed because it was too large.
During a remote procedure call, the arguments and the return value of the call are transferred as Parcel objects stored in the Binder transaction buffer. If the arguments or the return value are too large to fit in the transaction buffer, then the call will fail and TransactionTooLargeException will be thrown.
...
There are two possible outcomes when a remote procedure call throws TransactionTooLargeException. Either the client was unable to send its request to the service (most likely if the arguments were too large to fit in the transaction buffer), or the service was unable to send its response back to the client (most likely if the return value was too large to fit in the transaction buffer).
...
在某个地方,我传递或接收的参数超出了未知的限制。在哪里?
stacktrace没有显示任何有用的东西:
java.lang.RuntimeException: Adding window failed
at android.view.ViewRootImpl.setView(ViewRootImpl.java:548)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:406)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:320)
at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:152)
at android.view.Window$LocalWindowManager.addView(Window.java:557)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2897)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$600(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4977)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.os.TransactionTooLargeException
at android.os.BinderProxy.transact(Native Method)
at android.view.IWindowSession$Stub$Proxy.add(IWindowSession.java:569)
at android.view.ViewRootImpl.setView(ViewRootImpl.java:538)
... 16 more
android.os.TransactionTooLargeException
at android.os.BinderProxy.transact(Native Method)
at android.view.IWindowSession$Stub$Proxy.add(IWindowSession.java:569)
at android.view.ViewRootImpl.setView(ViewRootImpl.java:538)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:406)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:320)
at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:152)
at android.view.Window$LocalWindowManager.addView(Window.java:557)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2897)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$600(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4977)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
这似乎和观点有关?这与远程过程调用有什么关系?
可能重要的是:Android版本:4.0.3,设备:HTC One X
此异常通常在应用程序被发送到后台时抛出。
因此,我决定使用数据片段模式来完全绕过onSavedInstanceState生命周期。我的解决方案还处理复杂的实例状态并尽快释放内存。
首先,我创建了一个简单的片段来存储数据:
package info.peakapps.peaksdk.logic;
import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
/**
* A neat trick to avoid TransactionTooLargeException while saving our instance state
*/
public class SavedInstanceFragment extends Fragment {
private static final String TAG = "SavedInstanceFragment";
private Bundle mInstanceBundle = null;
public SavedInstanceFragment() { // This will only be called once be cause of setRetainInstance()
super();
setRetainInstance( true );
}
public SavedInstanceFragment pushData( Bundle instanceState )
{
if ( this.mInstanceBundle == null ) {
this.mInstanceBundle = instanceState;
}
else
{
this.mInstanceBundle.putAll( instanceState );
}
return this;
}
public Bundle popData()
{
Bundle out = this.mInstanceBundle;
this.mInstanceBundle = null;
return out;
}
public static final SavedInstanceFragment getInstance(FragmentManager fragmentManager )
{
SavedInstanceFragment out = (SavedInstanceFragment) fragmentManager.findFragmentByTag( TAG );
if ( out == null )
{
out = new SavedInstanceFragment();
fragmentManager.beginTransaction().add( out, TAG ).commit();
}
return out;
}
}
然后在我的主活动上,我完全绕过了保存的实例周期,并将责任推迟到我的数据片段。不需要对片段本身使用这个,因为它们的状态会自动添加到Activity的状态中):
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
SavedInstanceFragment.getInstance( getFragmentManager() ).pushData( (Bundle) outState.clone() );
outState.clear(); // We don't want a TransactionTooLargeException, so we handle things via the SavedInstanceFragment
}
剩下的就是弹出保存的实例:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(SavedInstanceFragment.getInstance(getFragmentManager()).popData());
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState( SavedInstanceFragment.getInstance( getFragmentManager() ).popData() );
}
详情:http://www.devsbedevin.net/avoiding-transactiontoolargeexception-on-android-nougat-and-up/
问题通过以下方式解决:
Bundle bundle = new Bundle();
bundle.putSerializable("data", bigdata);
...
CacheHelper.saveState(bundle,"DATA");
Intent intent = new Intent(mActivity, AActivity.class);
startActivity(intent, bb);// do not put data to intent.
In Activity:
@Override
protected void onCreate(Bundle savedInstanceState) {
Bundle bundle = CacheHelper.getInstance().loadState(Constants.DATA);
if (bundle != null){
Intent intent = getIntent();
intent.putExtras(bundle);
}
getIntent().getExtra(..);
....
}
@Override
protected void onDestroy() {
super.onDestroy();
CacheHelper.clearState("DATA");
}
public class CacheHelper {
public static void saveState(Bundle savedInstanceState, String name) {
Bundle saved = (Bundle) savedInstanceState.clone();
save(name, saved);
}
public Bundle loadState(String name) {
Object object = load(name);
if (object != null) {
Bundle bundle = (Bundle) object;
return bundle;
}
return null;
}
private static void save(String fileName, Bundle object) {
try {
String path = StorageUtils.getFullPath(fileName);
File file = new File(path);
if (file.exists()) {
file.delete();
}
FileOutputStream fos = new FileOutputStream(path, false);
Parcel p = Parcel.obtain(); //creating empty parcel object
object.writeToParcel(p, 0); //saving bundle as parcel
//parcel.writeBundle(bundle);
fos.write(p.marshall()); //writing parcel to file
fos.flush();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private static Bundle load(String fileName) {
try {
String path = StorageUtils.getFullPath(fileName);
FileInputStream fis = new FileInputStream(path);
byte[] array = new byte[(int) fis.getChannel().size()];
fis.read(array, 0, array.length);
Parcel parcel = Parcel.obtain(); //creating empty parcel object
parcel.unmarshall(array, 0, array.length);
parcel.setDataPosition(0);
Bundle out = parcel.readBundle();
out.putAll(out);
fis.close();
parcel.recycle();
return out;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static void clearState(Activity ac) {
String name = ac.getClass().getName();
String path = StorageUtils.getFullPath(name);
File file = new File(path);
if (file.exists()) {
file.delete();
}
}
}