小编atl*_*der的帖子

我正在为我的Android项目使用Android Studio.当构建与奇怪的堆栈跟踪崩溃时,我遇到了一个问题,如下所示:

Error:Execution failed for task ':app:compileDevDebugJavaWithJavac'.
 java.lang.RuntimeException: failure, see logs for details.
  cannot generate view binders java.lang.NullPointerException
    at android.databinding.tool.reflection.ModelMethod.isBoxingConversion(ModelMethod.java:155)
    at android.databinding.tool.store.SetterStore.isBetterParameter(SetterStore.java:946)
    at android.databinding.tool.store.SetterStore.getBestSetter(SetterStore.java:838)

似乎数据绑定整体被破坏了.

我之前进行了重构,并在包之间移动了类.

我想在Android中澄清使用view,propery等动画.

通常,我创建没有任何Tread的东西的动画 - 直接在我的Activity/Fagment/ViewClass中:

AlphaAnimation alphaAnimation = new AlphaAnimation(0,1);
alphaAnimation.setDuration(100);
mView.setAnimation(alphaAnimation);
alphaAnimation.start();

我理解这是在主UI线程中执行的动画.

但是,如果我将在工作线程中创建动画 - 这是正常的方式吗？

public void onClick(View v) {
  new Thread(new Runnable() {
    public void run() {
      final AlphaAnimation alphaAnimation = new AlphaAnimation(0,1);
      alphaAnimation.setDuration(100);
      mView.post(new Runnable() {
        public void run() {
          mView.setAnimation(alphaAnimation);
          alphaAnimation.start();
        }
      });
    }
  }).start();
}

我正在尝试将我的 RN 项目从 0.62.2 更新到最新版本（当前是 0.63.3）。我只是在运行npm update并收到错误：

npm ERR! Found: react@17.0.1
npm ERR! node_modules/react
npm ERR!   react@"^17.0.1" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer react@"16.13.1" from react-native@0.63.3
npm ERR! node_modules/react-native
npm ERR!   react-native@"^0.63.3" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

在跑步之前，npm update …

更新RubyMine后,我有正确设置的工作环境,并按预期rvm current返回2.2.4版本.但Rails总是在另一个版本(2.3.1)下运行.