android4.4设置默认launcher


修改frameworks\base\services\java\com\android\server\am\ActivityManagerService.java

在startHomeActivityLocked函数开始的地方加入下面语句

String packageName = SystemProperties.get("thirdparty.launcher.packagename", "com.android.launcher");
String className = SystemProperties.get("thirdparty.launcher.classname", "com.android.launcher2.Launcher");
if(isPkgInstalled(mContext, packageName) && !isDefaultLauncher(mContext, packageName))
setDefaultLauncher(packageName, className);

其中"thirdparty.launcher.packagename"和"thirdparty.launcher.classname"是需要在项目的prop文件中指定

thirdparty.launcher.packagename=yourpackagename
thirdparty.launcher.classname=yourclassname

这是上面引用到的函数

public  boolean isPkgInstalled(Context context, String packageName) {
if (packageName == null || "".equals(packageName))
return false;

android.content.pm.ApplicationInfo info = null;
try {
info = context.getPackageManager().getApplicationInfo(packageName, 0);
return info != null;
} catch (NameNotFoundException e) {
return false;
}
}

public boolean isDefaultLauncher(Context context, String packageName) {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
ResolveInfo res = context.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
if (res.activityInfo == null) {
// should not happen. A home is always installed, isn't it?
return false;
}
if (res.activityInfo.packageName.equals("android")) {
// 有多个桌面程序存在，且未指定默认项时；
return false;
} else {
Slog.i(TAG, "current Launcher packageName = " + res.activityInfo.packageName);
return packageName.equals(res.activityInfo.packageName);
}
}

private void setDefaultLauncher(String packageName, String className) {
// get default component
Slog.i(TAG, "defautl packageName = " + packageName + ", default className = " + className);
if ((packageName != null && packageName.trim().length() > 1) && (className != null && className.trim().length() > 0)) {
IPackageManager pm = ActivityThread.getPackageManager();

//清除当前默认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());
}
}

//获取所有launcher activity
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,getCurrentUserIdLocked());
}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();
Slog.d(TAG, "N:::::hyhyhyhy:::: = " + N);
ComponentName[] set = new ComponentName
;
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);
Slog.d(TAG, "r.activityInfo.packageName:::::hyhyhyhy:::: = " + r.activityInfo.packageName);
Slog.d(TAG, "r.activityInfo.name:::::hyhyhyhy:::: = " + r.activityInfo.name);
if (packageName.equals(r.activityInfo.packageName)) bestMatch = r.match;
}
//设置默认launcher
ComponentName launcher = new ComponentName(packageName, className);
try
{
pm.addPreferredActivity(filter, bestMatch, set, launcher,getCurrentUserIdLocked());
} catch (RemoteException e) {
throw new RuntimeException("Package manager has died", e);
}
}
}