java - 使用 Android 简单文件选择器时出现问题

Question

我正在尝试使用此处提供的简单文件选择器: https://rogerkeays.com/simple-android-file-chooser

努力让它发挥作用，我调用了我的主要 Activity :

new FileChooser(myactivity.this).setFileListener(new FileSelectedListener() {
@Override public void fileSelected(final File file) {
    // do something with the file
}).showDialog();

我已经添加了该类并引用了它 - 它编译正常 - 但它崩溃了:java.lang.IllegalStateException:无法执行 Activity 的方法

我的做法有什么问题吗？

非常感谢

编辑:完整日志

12-13 13:35:05.995 11029-11029/com.test.project E/AndroidRuntime: FATAL EXCEPTION: main
                                                                Process: com.test.project, PID: 11029
                                                                java.lang.IllegalStateException: Could not execute method of the activity
                                                                    at android.view.View$1.onClick(View.java:4020)
                                                                    at android.view.View.performClick(View.java:4780)
                                                                    at android.widget.CompoundButton.performClick(CompoundButton.java:120)
                                                                    at android.view.View$PerformClick.run(View.java:19866)
                                                                    at android.os.Handler.handleCallback(Handler.java:739)
                                                                    at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                    at android.os.Looper.loop(Looper.java:135)
                                                                    at android.app.ActivityThread.main(ActivityThread.java:5257)
                                                                    at java.lang.reflect.Method.invoke(Native Method)
                                                                    at java.lang.reflect.Method.invoke(Method.java:372)
                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
                                                                 Caused by: java.lang.reflect.InvocationTargetException
                                                                    at java.lang.reflect.Method.invoke(Native Method)
                                                                    at java.lang.reflect.Method.invoke(Method.java:372)
                                                                    at android.view.View$1.onClick(View.java:4015)
                                                                    at android.view.View.performClick(View.java:4780) 
                                                                    at android.widget.CompoundButton.performClick(CompoundButton.java:120) 
                                                                    at android.view.View$PerformClick.run(View.java:19866) 
                                                                    at android.os.Handler.handleCallback(Handler.java:739) 
                                                                    at android.os.Handler.dispatchMessage(Handler.java:95) 
                                                                    at android.os.Looper.loop(Looper.java:135) 
                                                                    at android.app.ActivityThread.main(ActivityThread.java:5257) 
                                                                    at java.lang.reflect.Method.invoke(Native Method) 
                                                                    at java.lang.reflect.Method.invoke(Method.java:372) 
                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
                                                                 Caused by: java.lang.NullPointerException: Attempt to get length of null array
                                                                    at com.test.project.FileChooser.refresh(FileChooser.java:103)
                                                                    at com.test.project.FileChooser.<init>(FileChooser.java:62)
                                                                    at com.test.project.myactivity.onToggleClickedPlayback(myactivity.java:1200)
                                                                    at java.lang.reflect.Method.invoke(Native Method) 
                                                                    at java.lang.reflect.Method.invoke(Method.java:372) 
                                                                    at android.view.View$1.onClick(View.java:4015) 
                                                                    at android.view.View.performClick(View.java:4780) 
                                                                    at android.widget.CompoundButton.performClick(CompoundButton.java:120) 
                                                                    at android.view.View$PerformClick.run(View.java:19866) 
                                                                    at android.os.Handler.handleCallback(Handler.java:739) 
                                                                    at android.os.Handler.dispatchMessage(Handler.java:95) 
                                                                    at android.os.Looper.loop(Looper.java:135) 
                                                                    at android.app.ActivityThread.main(ActivityThread.java:5257) 
                                                                    at java.lang.reflect.Method.invoke(Native Method) 
                                                                    at java.lang.reflect.Method.invoke(Method.java:372) 
                                                                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 
                                                                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 

12-13

Answer 1

发现问题 - 是因为模拟器上的文件系统为空，在真实设备上工作正常 - 将调整代码来处理!