本文主要是介绍解决： is not accessible from java.lang.Class android.app.AppComponentFactory，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
堆栈如下：
Caused by: java.lang.IllegalAccessException: java.lang.Class<com.MainActivity> is not accessible from java.lang.Class<android.app.AppComponentFactory>at java.lang.Class.newInstance(Native Method)at android.app.AppComponentFactory.instantiateActivity(AppComponentFactory.java:69)at android.support.v4.app.CoreComponentFactory.instantiateActivity(CoreComponentFactory.java:43)at android.app.Instrumentation.newActivity(Instrumentation.java:1215)at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2862)at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3079) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1836) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6702)
原因：
你的activity 不是public 的 ！
有问题的声明方式：
class MainActivity extends BaseActivity {@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main_layout);}
}需要改成下面这样：
public class MainActivity extends BaseActivity {@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main_layout);}
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