測試開啟前的設備系統準備工作。 # 接口 ~~~ /* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.tradefed.targetprep; import com.android.tradefed.build.IBuildInfo; import com.android.tradefed.device.DeviceNotAvailableException; import com.android.tradefed.device.ITestDevice; /** * Prepares the test environment for the test run. * <p/> * For example, installs software, tweaks env settings for testing, launches targets etc. * <p/> * Note that multiple {@link ITargetPreparer} can specified in a configuration. It is recommended * that each ITargetPreparer clearly document its expected environment pre-setup and post-setUp. * e.g. a ITargetPreparer that configures a device for testing must be run after the ITargetPreparer * that installs software. */ public interface ITargetPreparer { /** * Perform the target setup for testing. * * @param device the {@link ITestDevice} to prepare. * @param buildInfo data about the build under test. * @throws TargetSetupError if fatal error occurred setting up environment * @throws DeviceNotAvailableException if device became unresponsive */ public void setUp(ITestDevice device, IBuildInfo buildInfo) throws TargetSetupError, BuildError, DeviceNotAvailableException; } ~~~ 就一個方法：setUp()，比如你要安裝系統、安裝apk或者其他都是case要求的安裝事務都要在這個方法中完成。 # 實現類 ~~~ /* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.tradefed.targetprep; import com.android.ddmlib.Log; import com.android.tradefed.build.IBuildInfo; import com.android.tradefed.device.ITestDevice; /** * Placeholder empty implementation of a {@link ITargetPreparer}. */ public class StubTargetPreparer implements ITargetPreparer { /** * {@inheritDoc} */ @Override public void setUp(ITestDevice device, IBuildInfo buildInfo) throws TargetSetupError { Log.d("TargetPreparer", "skipping target prepare step"); } } ~~~ 這個類里面的方法就是打印了一句話，沒做任何處理。但是真正要是滿足自己特定的需求就要自己寫一個類繼承與該接口才行。