Android Studio 之 UVCCamera工程开发 编译错误：java.lang.RuntimeException: Unable to start activity

UVCCamera工程下载地址：https://github.com/saki4510t/UVCCamera

 

错误具体描述如下：

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.serenegiant.usbcameratest8, PID: 3186
                  java.lang.RuntimeException: Unable to start activity ComponentInfo{com.serenegiant.usbcameratest8/com.serenegiant.usbcameratest8.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2671)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2732)
                      at android.app.ActivityThread.-wrap12(ActivityThread.java)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1483)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:154)
                      at android.app.ActivityThread.main(ActivityThread.java:6141)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:802)
                   Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
                      at android.support.v7.app.AppCompatDelegateImplV9.createSubDecor(AppCompatDelegateImplV9.java:354)
                      at android.support.v7.app.AppCompatDelegateImplV9.ensureSubDecor(AppCompatDelegateImplV9.java:323)
                      at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284)
                      at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
                      at com.serenegiant.usbcameratest8.MainActivity.onCreate(MainActivity.java:119)
                      at android.app.Activity.performCreate(Activity.java:6709)
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2624)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2732) 
                      at android.app.ActivityThread.-wrap12(ActivityThread.java) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1483) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:154) 
                      at android.app.ActivityThread.main(ActivityThread.java:6141) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:802) 
Application terminated.

最直接的解决方法就是：根据这句提示“Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.”，修改src/main/AndroidManifest.xml 中的android:theme，

android:theme="@style/Theme.AppCompat"

第二种方式：因为当前theme设定的theme，是当前Android Studio（AS）不支持的，所以我们换一个AS支持的就可以了。