引言

手机工厂测试需求，设计组合键开机快速进入工程测试apk，减少员工测试等待用时．

Android Framework层修改

确认是否是工程测试开机模式
屏蔽开机向导
开机扫描apk个数最小化
开机直接启动工程测试apk

1. 启动模式保存到系统属性值

代码路径：/frameworks/base/core/jni/AndroidRuntime.cpp

static void setFactoryMode(){
   FILE *fp;
   int FACTORY_MODE = 1;
   int value;

   if((fp=fopen("/sys/devices/platform/hq_boot_status/boot_status","rt"))==NULL){
       ALOGE("[FACTORY_MODE] Can not open file");
       return;
   }
    value = fgetc(fp);
    ALOGE("[FACTORY_MODE] hq_boot_status = %d", value);
    if(FACTORY_MODE == value){
        int result = property_set("ro.hq.factorymode", "1");
        if(result < 0){
            ALOGE("[FACTORY_MODE] set prop failed!\n");
        }
    }
    fclose(fp);
}
......
int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv, bool zygote)
{
......
     setFactoryMode();
......
}

startVm是启动Dalvik虚拟机方法，在里面添加setFactoryMode方法．
/sys/devices/platform/hq_boot_status/boot_status节点信息是驱动保存的开机启动方式id，组合键进入的话值为１.
int result = property_set("ro.hq.factorymode", "1") 写入属性值ro.hq.factorymode为１，后续给Android的java层调用．

２. PMS扫描安装指定的apk

代码路径：frameworks/base / services/core/java/com/android/server/pm/PackageManagerService.java

    boolean isFactoryKitTest = getFactoryKitMode();
    private List<String> factoryPackages = new ArrayList<String>() {{
        add("android");
        add("com.mediatek");
        add("com.android.providers.telephony");
        add("com.android.providers.applications");
        add("com.android.defcontainer");
        add("com.android.providers.settings");
        add("com.android.keychain");
        add("com.android.dialer");
        add("com.android.packageinstaller");
        add("com.google.android.packageinstaller");
        add("com.android.settings");
        add("com.android.phone");
        add("com.android.systemui");
        add("com.android.huaqin.factory");
        add("com.android.bluetooth");
        add("com.android.launcher3");
    }};
    
    private boolean getFactoryKitMode() {
        int result = SystemProperties.getInt("ro.hq.factorymode", 0);
        if (result == 1) {
            return true;
        }
        return false;
    }

......
   private PackageParser.Package scanPackageLI(File scanFile, int parseFlags, int scanFlags,
            long currentTime, UserHandle user) throws PackageManagerException {
......
        if(isFactoryKitTest  && !factoryPackages.contains(pkg.packageName)){
            Slog.d(TAG, "Current in factory test mode, package: " + pkg.packageName + "not in factory application list,Skipping...");
            return pkg;
        }
......
        }

创建动态数组factoryPackages，里面包含需要安装的APK包名，都是Android启动必须包含的apk或者是测试模式下需要用到的apk．
getFactoryKitMode方法去读取ro.hq.factorymode的值，确定是工程测试模式的化返回true．
scanPackageLI是安装apk的方法，在这里判断factoryPackages是否包含即将进入安装流程的apk，来确定是否继续．

3. AMS中改变home属性的category

代码位置:frameworks/base / services/core/java/com/android/server/am/ActivityManagerService.java

    Intent getHomeIntent() {
        Intent intent = new Intent(mTopAction, mTopData != null ? Uri.parse(mTopData) : null);
        intent.setComponent(mTopComponent);
        intent.addFlags(Intent.FLAG_DEBUG_TRIAGED_MISSING);
        if (mFactoryTest != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
            /*[FACTORY_TEST_BY_APK] modify start*/
            //intent.addCategory(Intent.CATEGORY_HOME);
            //changed for factorykit,if factory kit mode is set,start factory kit apk,otherwise,start HOME activity. 2013.08.09.yjf
            int factorykitmode = 0;
            factorykitmode = SystemProperties.getInt("ro.hq.factorymode", 0);
            if(factorykitmode == 1)
            {
                intent.addCategory("android.category.factory.kit");
            }
            else
            {   
                intent.addCategory(Intent.CATEGORY_HOME);
            }
        /*[FACTORY_TEST_BY_APK] modify end*/
        }
        return intent;
    }