1、找到ActivityManagerService.java
在..\rk3229_5.1_box\frameworks\base\services\core\java\com\android\server\am目录找到ActivityManagerService.java文件。在文件里找到startHomeActivityLocked函数里的setDefaultLauncher。
boolean startHomeActivityLocked(int userId, String reason) {
setDefaultLauncher(userId);
if (mFactoryTest == FactoryTest.FACTORY_TEST_LOW_LEVEL
&& mTopAction == null) {
// We are running in factory test mode, but unable to find
// the factory test app, so just sit around displaying the
// error message and don't try to start anything.
return false;
}
Intent intent = getHomeIntent();
ActivityInfo aInfo =
resolveActivityInfo(intent, STOCK_PM_FLAGS, userId);
if (aInfo != null) {
intent.setComponent(new ComponentName(
aInfo.applicationInfo.packageName, aInfo.name));
// Don't do this if the home app is currently being
// instrumented.
aInfo = new ActivityInfo(aInfo);
aInfo.applicationInfo = getAppInfoForUser(aInfo.applicationInfo, userId);
ProcessRecord app = getProcessRecordLocked(aInfo.processName,
aInfo.applicationInfo.uid, true);
if (app == null || app.instrumentationClass == null) {
intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
mStackSupervisor.startHomeActivity(intent, aInfo, reason);
}
}
return true;
}2、设置开机默认桌面包名
在setDefaultLauncher设置开机默认桌面launch的包名。我开发的固件，所要启动的包名如下：
String packageName = SystemProperties.get("persist.sys.yz.defpackage", "com.zhai.ads");
String className = SystemProperties.get("persist.sys.yz.defclass", "com.zhai.touchhome.Loading");
private void setDefaultLauncher(int userId)
{
// get default component
//String packageName = SystemProperties.get("persist.sys.yz.defpackage", "com.zhaisoft.app.hesiling");
// String className = SystemProperties.get("persist.sys.yz.defclass", "com.zhaisoft.app.hesiling.activity.MainActivity");
String packageName = SystemProperties.get("persist.sys.yz.defpackage", "com.zhai.ads");
String className = SystemProperties.get("persist.sys.yz.defclass", "com.zhai.touchhome.Loading");
Slog.i(TAG, "default packageName = " + packageName + ", default className = " + className);
if(!packageName.equals("no") && !className.equals("no")){
boolean firstLaunch = SystemProperties.getBoolean("persist.sys.sw.firstLaunch", true);
Slog.d(TAG, "firstLaunch = " + firstLaunch);
if(firstLaunch){
mFirstLaunch = true;
// do this only for the first boot
SystemProperties.set("persist.sys.sw.firstLaunch", "false");
}
Slog.d(TAG, "mFirstLaunch = " + mFirstLaunch);
// if(mFirstLaunch){
IPackageManager pm = ActivityThread.getPackageManager();
//clear the current preferred launcher
ArrayList<IntentFilter> intentList = new ArrayList<IntentFilter>();
ArrayList<ComponentName> cnList = new ArrayList<ComponentName>();
mContext.getPackageManager().getPreferredActivities(intentList, cnList, null);
IntentFilter dhIF;
for(int i = 0; i < cnList.size(); i++)
{
dhIF = intentList.get(i);
if(dhIF.hasAction(Intent.ACTION_MAIN) &&
dhIF.hasCategory(Intent.CATEGORY_HOME))
{
mContext.getPackageManager().clearPackagePreferredActivities(cnList.get(i).getPackageName());
}
}
// get all Launcher activities
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
List<ResolveInfo> list = new ArrayList<ResolveInfo>();
try
{
list = pm.queryIntentActivities(intent,
intent.resolveTypeIfNeeded(mContext.getContentResolver()),
PackageManager.MATCH_DEFAULT_ONLY, userId);
}catch (RemoteException e) {
throw new RuntimeException("Package manager has died", e);
}
// get all components and the best match
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_MAIN);
filter.addCategory(Intent.CATEGORY_HOME);
filter.addCategory(Intent.CATEGORY_DEFAULT);
final int N = list.size();
ComponentName[] set = new ComponentName[N];
int bestMatch = 0;
for (int i = 0; i < N; i++)
{
ResolveInfo r = list.get(i);
set[i] = new ComponentName(r.activityInfo.packageName,
r.activityInfo.name);
if (r.match > bestMatch) bestMatch = r.match;
}
// add the default launcher as the preferred launcher
ComponentName launcher = new ComponentName(packageName, className);
try
{
pm.addPreferredActivity(filter, bestMatch, set, launcher, userId);
} catch (RemoteException e) {
throw new RuntimeException("Package manager has died", e);
}
//}
}
}3、寻找HomeSettings.java
在..\rk3229_5.1_box\packages\apps\Settings\src\com\android\settings里寻找HomeSettings.java文件。在makeCurrentHome里第二次设置自己需要的桌面。主要是客户有两个桌面，需要频繁切换。
void makeCurrentHome(HomeAppPreference newHome) {
if (mCurrentHome != null) {
mCurrentHome.setChecked(false);
}
newHome.setChecked(true);
mCurrentHome = newHome;
mPm.replacePreferredActivity(mHomeFilter, IntentFilter.MATCH_CATEGORY_EMPTY,
mHomeComponentSet, newHome.activityName);
//huangxing add
System.out.println("huangxing----activityName== " + newHome.activityName);
//ComponentName chatActivity =new ComponentName();
String launcherInfo = newHome.activityName.toString();
System.out.println("huangxing----launcherInfo== " + launcherInfo);
if(launcherInfo.indexOf("com.android.launcher3") != -1){
SystemProperties.set("persist.sys.yz.defpackage", "com.android.launcher3");
SystemProperties.set("persist.sys.yz.defclass", "com.android.launcher3.Launcher");
System.out.println("huangxing---launcher3-----");
}else if(launcherInfo.indexOf("com.zhai.ads") != -1){
SystemProperties.set("persist.sys.yz.defpackage", "com.zhai.ads");
SystemProperties.set("persist.sys.yz.defclass", "com.zhai.touchhome.Loading");
System.out.println("huangxing---com.zhai.ads-----");
}else {
//wjz add
System.out.println("huangxing---heshiling launcher-----");
SystemProperties.set("persist.sys.yz.defpackage", "com.zhaisoft.app.hesiling");
SystemProperties.set("persist.sys.yz.defclass", "com.zhaisoft.app.hesiling.activity.MainActivity");
//SystemProperties.set("persist.sys.yz.defpackage", "com.zhai.ads");
//SystemProperties.set("persist.sys.yz.defclass", "com.zhai.touchhome.Loading");
}
getActivity().setResult(Activity.RESULT_OK);
}4、在System.prop的文件里，设置默认launcher
为了客户定制更加灵活，后来在System.prop里设置了默认launcher的参数。通过脚本配置，进行一站式编译。文章来源：https://www.toymoban.com/news/detail-735515.html
文章来源地址https://www.toymoban.com/news/detail-735515.html
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