我正在使用Instrumentation在各种 android 设备上运行我的单元测试。测试用例在模拟器和除Samsung Galaxy S之外的所有设备上运行良好。在三星 Galaxy S 上,它在使用仪器注入大约 30 个关键事件后显示窗口管理器崩溃,这是完整的崩溃日志:
D/dalvikvm(11862): GC_EXPLICIT freed 6800 objects / 374040 bytes in 54ms
D/dalvikvm(11862): GC_EXPLICIT freed 780 objects / 71856 bytes in 39ms
W/dalvikvm(11862): threadid=9: thread exiting with uncaught exception (group=0x4001d7d0)
E/WindowManager( 2472): Window Manager Crash
E/WindowManager( 2472): java.lang.NullPointerException
E/WindowManager( 2472): at com.android.server.WindowManagerService$KeyWaiter.waitForNextEventTarget(WindowManagerService.java:5844)
E/WindowManager( 2472): at com.android.server.WindowManagerService.injectKeyEvent(WindowManagerService.java:5565)
E/WindowManager( 2472): at android.view.IWindowManager$Stub.onTransact(IWindowManager.java:110)
E/WindowManager( 2472): at com.android.server.WindowManagerService.onTransact(WindowManagerService.java:692)
E/WindowManager( 2472): at android.os.Binder.execTransact(Binder.java:288)
E/WindowManager( 2472): at dalvik.system.NativeStart.run(Native Method)
E/AndroidRuntime(11862): FATAL EXCEPTION: Instr: com.myapp.test.ImpInstrumentation
E/AndroidRuntime(11862): java.lang.NullPointerException
E/AndroidRuntime(11862): at android.os.Parcel.readException(Parcel.java:1266)
E/AndroidRuntime(11862): at android.os.Parcel.readException(Parcel.java:1248)
E/AndroidRuntime(11862): at android.view.IWindowManager$Stub$Proxy.injectKeyEvent(IWindowManager.java:830)
E/AndroidRuntime(11862): at android.app.Instrumentation.sendKeySync(Instrumentation.java:859)
E/AndroidRuntime(11862): at android.app.Instrumentation.sendKeyDownUpSync(Instrumentation.java:872)
E/AndroidRuntime(11862): at com.myapp.test.util.ListUtil.<b>arrowDownToPosition</b>(ListUtil.java:69)
这是它通常崩溃的一段代码:
private void arrowDownToPosition(int position) {
int maxDowns = 50;
while(mListView.getSelectedItemPosition() < position && --maxDowns > 0) {
mInstrumentation.sendKeyDownUpSync(KeyEvent.KEYCODE_DPAD_DOWN);
}
//Crashes on below line dispatching enter key
mInstrumentation.sendKeyDownUpSync(KeyEvent.KEYCODE_ENTER);
}
欢迎所有解决方案/建议。