【问题描述】
工具：Cts-Verifier-9.0-R11.apk
测试Camera ITS Test时，点击该测试项后verifier apk闪退。重新打开后该项未pass变绿。
【问题结论】
AuthBlog：秋城https://www.cnblogs.com/houser0323
最新结论：是waiver项。
拿到了Google-waiver id：https://partnerissuetracker.corp.google.com/issues/150153190
怀疑verifier工具问题
r8工具没问题，r11有问题。
r11工具在送测成功的盒子也有问题。
【分析详细】
1.crash日志：
03-04 14:34:36.977 8091 8091 D AndroidRuntime: Shutting down VM
--------- beginning of crash
03-04 14:34:36.987 8091 8091 E AndroidRuntime: FATAL EXCEPTION: main
03-04 14:34:36.987 8091 8091 E AndroidRuntime: Process: com.android.cts.verifier, PID: 8091
03-04 14:34:36.987 8091 8091 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.cts.verifier/com.android.cts.verifier.camera.its.ItsTestActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int com.android.cts.verifier.TestListAdapter.getCount()' on a null object reference
。。。。。。
03-04 14:34:36.987 8091 8091 E AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int com.android.cts.verifier.TestListAdapter.getCount()' on a null object reference
03-04 14:34:36.987 8091 8091 E AndroidRuntime: at com.android.cts.verifier.PassFailButtons$TestListActivity.getHistoryCollection(PassFailButtons.java:294)
03-04 14:34:36.987 8091 8091 E AndroidRuntime: at com.android.cts.verifier.PassFailButtons$TestListActivity.setTestResultAndFinish(PassFailButtons.java:282)
03-04 14:34:36.987 8091 8091 E AndroidRuntime: at com.android.cts.verifier.camera.its.ItsTestActivity.onCreate(ItsTestActivity.java:347)
03-04 14:34:36.987 8091 8091 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:7144)
03-04 14:34:36.987 8091 8091 E AndroidRuntime: at android.app.Activity.performCreate(Activity.java:7135)
03-04 14:34:36.987 8091 8091 E AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
03-04 14:34:36.987 8091 8091 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2894)
03-04 14:34:36.987 8091 8091 E AndroidRuntime: ... 11 more
03-04 14:34:37.000 3184 4971 W ActivityManager: Force finishing activity com.android.cts.verifier/.camera.its.ItsTestActivity
03-04 14:34:37.003 3184 4971 W ActivityManager: Force finishing activity com.android.cts.verifier/.CtsVerifierActivity
03-04 14:34:37.009 2988 3123 W libc : Unable to set property "sys.vsync.type" to "": error code: 0x18
03-04 14:34:37.010 8091 8091 I Process : Sending signal. PID: 8091 SIG: 9
2.比较追溯源码
经对比，r8不会crash。r8工具与r11工具的代码有差异，新增了一个函数调用getHistoryCollection()
camera/its/ItsTestActivity.java +347
342 if (mToBeTestedCameraIds.size() == 0) {
343 showToast(R.string.all_exempted_devices);
344 ItsTestActivity.this.getReportLog().setSummary(
345 "PASS: all cameras on this device are exempted from ITS"
346 , 1.0, ResultType.NEUTRAL, ResultUnit.NONE);//该语句表明测试已经pass。crash出现在下一句，与测试逻辑无关，是apk自身代码有问题。
347 setTestResultAndFinish(true);//
348 }
=============================================
ItsTestActivity.java:347
@@ -171,25 +160,19 @@
@Override
public void setTestResultAndFinish(boolean passed) {
PassFailButtons.setTestResultAndFinishHelper(
+ this, getTestId(), getTestDetails(), passed, getReportLog(),
+ getHistoryCollection());//增加了最后一个参数，是函数的调用返回值。
- this, getTestId(), getTestDetails(), passed, getReportLog());
}
=============================================
PassFailButtons.java:294
288 /**
289 * Get existing test history to aggregate.
290 */
291 @Override
292 public TestResultHistoryCollection getHistoryCollection() {
293 List<TestResultHistoryCollection> histories =
294 IntStream.range(0, mAdapter.getCount())//由于mAdapter是null，所以空指针异常crash了。
295 .mapToObj(mAdapter::getHistoryCollection)
296 .collect(Collectors.toList());
如上294，测试apk的代码有问题，所以空指针异常crash了。