我正在尝试使用新的授予权限规则 https://developer.android.com/reference/android/support/test/rule/GrantPermissionRule.html这是最新支持库的一部分。
在我的清单中，我声明以下内容：
<uses-permission android:name="android.permission.SET_TIME"/>
在我的代码中我调用：
@Rule
public GrantPermissionRule mPermissionRule = GrantPermissionRule.grant(Manifest.permission.SET_TIME);
但是当我运行测试时，我看到错误：
12-28 14:09:35.063 7193-7215/com.blah.test E/GrantPermissionCallable: Permission: android.permission.SET_TIME cannot be granted!
12-28 14:09:35.066 7193-7215/com.blah I/TestRunner: failed: maxOfflineWithChangingDeviceTime(com.blah)
12-28 14:09:35.066 7193-7215/com.blah I/TestRunner: ----- begin exception -----
12-28 14:09:35.073 7193-7215/com.blah I/TestRunner: junit.framework.AssertionFailedError: Failed to grant permissions, see logcat for details
at junit.framework.Assert.fail(Assert.java:50)
at android.support.test.runner.permission.PermissionRequester.requestPermissions(PermissionRequester.java:110)
at android.support.test.rule.GrantPermissionRule$RequestPermissionStatement.evaluate(GrantPermissionRule.java:108)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:58)
at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:375)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1932)
12-28 14:09:35.073 7193-7215/com.blah I/TestRunner: ----- end exception -----
我的 build.gradle 更新了以下几行：
androidTestCompile 'com.android.support.test:runner:1.0.1'
androidTestCompile 'com.android.support.test:rules:1.0.1'
androidTestCompile 'com.android.support.test.espresso:espresso-core:3.0.0'
有什么建议或解决方案吗？
SET_TIME is a signature|privileged级权限 https://android.googlesource.com/platform/frameworks/base/+/master/core/res/AndroidManifest.xml。您无法在运行时请求它，无论是否使用requestPermissions() or GrantPermissionRule.
而且，除非您正在构建自己的固件或计划由 root 用户在特权分区上安装您的应用程序，否则您也可以删除<uses-permission>清单中的元素。
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