. lang。com.example.camera InstantiationException:类。MainActivity没有零参数构造函数。

03-02 12:03:23.564: D/AndroidRuntime(9302): Shutting down VM
03-02 12:03:23.570: E/AndroidRuntime(9302): FATAL EXCEPTION: main
03-02 12:03:23.570: E/AndroidRuntime(9302): Process: com.example.camera, PID: 9302
03-02 12:03:23.570: E/AndroidRuntime(9302): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.camera/com.example.camera.MainActivity}: java.lang.InstantiationException: class com.example.camera.MainActivity has no zero argument constructor
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2225)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.app.ActivityThread.access0(ActivityThread.java:148)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.os.Handler.dispatchMessage(Handler.java:102)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.os.Looper.loop(Looper.java:135)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.app.ActivityThread.main(ActivityThread.java:5312)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at java.lang.reflect.Method.invoke(Native Method)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at java.lang.reflect.Method.invoke(Method.java:372)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
03-02 12:03:23.570: E/AndroidRuntime(9302): Caused by: java.lang.InstantiationException: class com.example.camera.MainActivity has no zero argument constructor
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at java.lang.Class.newInstance(Class.java:1563)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.app.Instrumentation.newActivity(Instrumentation.java:1088)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2215)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	... 10 more
03-02 12:03:23.570: E/AndroidRuntime(9302): Caused by: java.lang.NoSuchMethodException: <init> []
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at java.lang.Class.getConstructor(Class.java:531)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at java.lang.Class.getDeclaredConstructor(Class.java:510)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	at java.lang.Class.newInstance(Class.java:1561)
03-02 12:03:23.570: E/AndroidRuntime(9302): 	... 12 more03-02 12:03:23.564: D/AndroidRuntim