UiAutomator2 Android Studio模拟器使用takescreenshot()不能成功截图

[FunctionTwo]

@RunWith(AndroidJUnit4.class)
public class BySelectorTest {
    UiDevice device;
    Instrumentation instrumentation;

    @Before
    public void setUp() throws RemoteException, UiObjectNotFoundException {
       //初始化
        instrumentation= InstrumentationRegistry.getInstrumentation();
        device=UiDevice.getInstance(instrumentation);
｝
 @Test
    public void testByselectorBy() throws UiObjectNotFoundException, RemoteException {



        Boolean tmpa = device.takeScreenshot(new File("/mnt/sdcard/DCIM/test2.png"));
        System.out.println("截屏返回值:" + tmpa);
｝
｝

04-13 14:24:13.428 5144-5158/? W/gralloc_ranchu: Gralloc pipe failed
                                                 
                                                 [ 04-13 14:24:13.428  5144: 5158 D/         ]
                                                 HostConnection::get() New Host Connection established 0xa0738180, tid 5158
04-13 14:24:13.457 1229-1229/? E/EGL_emulation: tid 1229: eglCreateSyncKHR(1451): error 0x3004 (EGL_BAD_ATTRIBUTE)
04-13 14:24:13.547 5160-5184/? E/UiAutomatorBridge: failed to save screen shot to file
                                                    java.io.FileNotFoundException: /data/local/tmp/test2.png (Permission denied)
                                                        at java.io.FileOutputStream.open(Native Method)
                                                        at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
                                                        at java.io.FileOutputStream.<init>(FileOutputStream.java:169)
                                                        at android.support.test.uiautomator.UiAutomatorBridge.takeScreenshot(UiAutomatorBridge.java:131)
                                                        at android.support.test.uiautomator.UiDevice.takeScreenshot(UiDevice.java:1025)
                                                        at android.support.test.uiautomator.UiDevice.takeScreenshot(UiDevice.java:1009)
                                                        at BySelectorTest.testByselectorBy(BySelectorTest.java:71)
                                                        at java.lang.reflect.Method.invoke(Native Method)
                                                        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
                                                        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
                                                        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
                                                        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
                                                        at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
                                                        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$2.evaluate(ParentRunner.java:268)
                                                        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
                                                        at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
                                                        at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
                                                        at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59)
                                                        at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262)
                                                        at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1932)
04-13 14:24:13.548 5160-5184/? I/System.out: 截屏返回值:false
04-13 14:24:13.549 5160-5184/? I/TestRunner: finished: testByselectorBy(BySelectorTest)
04-13 14:24:13.553 5160-5160/? I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0
04-13 14:24:13.553 5160-5184/? I/TestRunner: started: useAppContext(com.example.administrator.ui2byselector.ExampleInstrumentedTest)
04-13 14:24:13.554 5160-5160/? I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0
04-13 14:24:13.555 5160-5184/? I/TestRunner: finished: useAppContext(com.example.administrator.ui2byselector.ExampleInstrumentedTest)
04-13 14:24:13.556 5160-5160/? I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0
04-13 14:24:13.558 5160-5184/? I/TestRunner: run finished: 2 tests, 0 failed, 0 ignored
04-13 14:24:13.559 5160-5184/? I/MonitoringInstrumentation: waitForActivitiesToComplete() took: 0ms
04-13 14:24:13.560 5160-5160/? I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0
04-13 14:24:13.560 1489-1503/system_process W/WindowManager: Attempted to remove non-existing token: android.os.Binder@27006d6
04-13 14:24:13.564 1489-1887/system_process I/ActivityManager: Force stopping com.example.administrator.ui2byselector appid=10075 user=0: finished inst
04-13 14:24:13.564 1489-1887/system_process I/ActivityManager: Killing 5160:com.example.administrator.ui2byselector/u0a75 (adj 0): stop com.example.administrator.ui2byselector
04-13 14:24:13.574 5144-5157/? I/art: Starting a blocking GC HeapTrim

请问下是路径不对还是没权限？权限处我就写了一个

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

但是我路径写/sdcard/DCIM/test2.png也不能成功保存截图

[讲究]

[android]使用 Uiautomator 来捕获图像/截图时出现异常 标签: Android 发布时间: 2013/12/21 22:23:14 本文来自: http://stackoverflow.com/questions/17810535/exception-while-using-uiautomator-to-capture-image-screenshot 注意事项: 本文中文内容可能为机器翻译,如要查看英文原文请点击上面连接. 同时使用 UiautomatorTestcase 类来捕获截图的我主要活动我面对以下异常。 我使用的代码示例 public class MyActivityTest extends UiAutomatorTestCase { public UiautomatorAdaptxt() { // TODO Auto-generated constructor stub } @Override protected void setUp() throws Exception { // TODO Auto-generated method stub super.setUp(); } public void testOpenMainActivity() throws UiObjectNotFoundException { -->Here I use the code to open my Activity<-- getUiDevice().takeScreenshot(storePath); } } 我与面对的例外是 java.lang.NoSuchMethodError： 在.testOpenMainActivity （MyActivityTest.java:31） 在 java.lang.reflect.Method.invokeNative （本机方法） 在 com.android.uiautomator.core.UiDevice.takeScreenshot com.android.uiautomator.testrunner.UiAutomatorTestRunner.start(UiAutomatorTestRunner.java:124) 在 dalvik.system.NativeStart.main （本机方法） com.android.internal.os.RuntimeInit.main(RuntimeInit.java:235) com.android.internal.os.RuntimeInit.nativeFinishInit （本机方法） com.android.commands.uiautomator.Launcher.main(Launcher.java:83) com.android.commands.uiautomator.RunTestCommand.run(RunTestCommand.java:76) com.android.uiautomator.testrunner.UiAutomatorTestRunner.run (UiAutomatorTestRunner.java:8 5) 解决方法 1: 你需要一个 Android 4.2 设备或稍后要采取这种方式的屏幕截图。 这是因为 takeScreenshot 目标被称为 Android 4.2 或 API 级别 17 中添加方法。 请参阅官方文档。 发生了什么是当您在您的本地计算机上编译时您编译针对 android 17 或稍后包含此方法，因此编译成功。然而，当部署于 android-16 目标 android 设备上时，此方法是失踪。当测试代码尝试调用此方法，它将引发 NoSuchMethodError 异常。 作为一种替代方法，您可以使用亚行的截图就像这样 adb shell screencap -p /data/local/tmp/screen-capture.png adb pull /data/local/tmp/screen-capture.png <localfile.png> adb shell rm /data/local/tmp/screen-capture.png