小编Niq*_*iqo的帖子

在有效的Android HTTP中, Jesse Wilson提到了以下内容:

提供图像等静态资源？使用永久URL并让它永远缓存

我正在使用Picasso和一个特定的OkHttp实例来获取和缓存图像.我想知道如何设置let it cache forever策略？

我只能考虑Cache-Control: max-stale=用尽可能高的值覆盖HTTP缓存控制头max-stale(),还有另一种(更好的)方法吗？

我正在使用Otto 1.3.3,当我恢复我的应用程序时,我有时会得到IllegalArgumentException以下堆栈跟踪:

Caused by: java.lang.IllegalArgumentException: Producer method for type class 
com.couchsurfing.mobile.ui.setup
        .SessionProviderFragment$SessionConnectionStateChangeEvent found on 
        type class com.couchsurfing.mobile.ui.setup.SessionProviderFragment, 
        but already registered by type class 
        com.couchsurfing.mobile.ui.setup.SessionProviderFragment.
    at com.squareup.otto.Bus.register(Bus.java:194)
    at com.couchsurfing.mobile.ui.BaseRetainedFragment
       .onCreate(BaseRetainedFragment.java:20)

该SessionProviderFragment有它的实例保留,请找扩展的类如下所示:

public abstract class BaseRetainedFragment extends SherlockFragment {

    @Inject
    Bus bus;

    @Override
    public void onCreate(final Bundle state) {
        super.onCreate(state);
        ((CouchsurfingApplication) getActivity().getApplication()).inject(this);
        setRetainInstance(true);
        bus.register(this);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        bus.unregister(this);
        bus = null;
    }
}

我试过使用bus.register(this)in onAttach()或者onCreate()没有改变这个问题.

我使用Robolectric 2.x(我实际上使用2.1)与使用APKLIB的Android Maven项目有问题.

它接缝Robolectric 2.x期望在project.properties中引用Android库(此文件由Intellij或Eclipse自动填充).

在开发环境中使用Maven时工作正常,但是如果我想在CI服务器(Jenkins)上构建我的Android Maven项目,我的构建失败了:

java.lang.RuntimeException: huh? can't find parent for StyleData{name='Theme_Abs_cs', parent='@style/Theme_Sherlock_Light'}

显然Robolectric找不到Android库依赖项.

有没有人使用Android APKLIB + Jenkins + Maven + Robolectric 2.x进行配置？

我对构建本机和基于 WebView 的 Android 屏幕感兴趣。我希望在从本机屏幕导航到 WebView 屏幕时保持用户登录状态。但我不知道如何实现这一目标。

我正在使用LeakCanary 1.3.1-SNAPSHOT.我发现有关ViewTreeObserver.OnScrollChangedListener设置的泄漏,我修复了它,如下面的代码:

  private ViewTreeObserver.OnScrollChangedListener scrollViewChangeListener;

  @Override protected void onFinishInflate() {
      super.onFinishInflate();
      ButterKnife.inject(this);
      scrollViewChangeListener = new ViewTreeObserver.OnScrollChangedListener() {
      @Override public void onScrollChanged() {
        EventDetailsView.this.onScrollChanged(scrollView.getScrollY());
      }
    };
      scrollView.getViewTreeObserver()
        .addOnScrollChangedListener(scrollViewChangeListener);
  }
  @Override public void onDetachedFromWindow() {
      super.onDetachedFromWindow();
      scrollView.getViewTreeObserver().removeOnScrollChangedListener(scrollViewChangeListener);
  }

然而,LeakCanary仍然将其报告为泄漏,任何想法为什么？

* com.couchsurfing.mobile.ui.events.detail.EventDetailsScreen$Presenter has leaked:
* GC ROOT android.view.inputmethod.InputMethodManager$1.this$0 (anonymous class extends com.android.internal.view.IInputMethodClient$Stub)
* references android.view.inputmethod.InputMethodManager.mCurRootView
* references com.android.internal.policy.impl.PhoneWindow$DecorView.mAttachInfo
* references android.view.View$AttachInfo.mTreeObserver
* references android.view.ViewTreeObserver.mOnScrollChangedListeners
* references android.view.ViewTreeObserver$CopyOnWriteArray.mData
* references java.util.ArrayList.array
* references array java.lang.Object[].[0]
* references com.couchsurfing.mobile.ui.events.detail.EventDetailsView$1.this$0 (anonymous class implements android.view.ViewTreeObserver$OnScrollChangedListener) …

我有一个扩展CoordinatorLayout的自定义视图,我正在重写onRestoreInstanceState并onSaveInstanceState使用扩展BaseSavedState的类的典型方法.当我的观点恢复后,我得到:

Caused by: android.os.BadParcelableException: ClassNotFoundException when unmarshalling: android.support.design.widget.CoordinatorLayout$SavedState
at android.os.Parcel.readParcelableCreator(Parcel.java:2432)
at android.os.Parcel.readParcelable(Parcel.java:2358)
at android.view.AbsSavedState.(AbsSavedState.java:57)
at android.view.View$BaseSavedState.(View.java:21457)
at android.support.design.widget.CoordinatorLayout$SavedState.(CoordinatorLayout.java:2656)

 @Override
  protected Parcelable onSaveInstanceState() {
    Parcelable superState = super.onSaveInstanceState();
    SavedState ss = new SavedState(superState);
    ss.scrollX = scrollView.getScrollX();
    ss.scrollY = scrollView.getScrollY();
    return ss;
  }

  @Override
  protected void onRestoreInstanceState(Parcelable state) {
    if (!(state instanceof SavedState)) {
      super.onRestoreInstanceState(state);
      return;
    }
    final SavedState ss = (SavedState) state;
    super.onRestoreInstanceState(ss.getSuperState());

    post(() -> scrollView.scrollTo(ss.scrollX, ss.scrollY));
  } …