[DESCRIPTION]
After power on and unlocking, if there are multiple launchers in the system, a selection box will pop up to let the user choose to enter a launchers. If the user does not want to select, but wants to directly enter a default Launcher, how to modify it?
[SOLUTION]
Note: this modification method is not valid for Google now launcher (Google home. APK).
If GMS is not preset, just follow step 1 to modify it. If GMS is preset, follow steps 1 and 2 to modify it.
1, Modify the startHomeActivityLocked method of ActivityManagerService.java
boolean startHomeActivityLocked(int userId, String reason) {
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;
}
//mtk add start
final PackageManager mPm = mContext.getPackageManager();
Intent homeIntent=new Intent();
homeIntent.addCategory(Intent.CATEGORY_HOME);
homeIntent.setAction(Intent.ACTION_MAIN);
homeIntent.addCategory(Intent.CATEGORY_DEFAULT);
ResolveInfo info = mPm.resolveActivity(homeIntent, PackageManager.MATCH_DEFAULT_ONLY);
if("com.google.android.setupwizard".equals(info.activityInfo.packageName) || "android".equals(info.activityInfo.packageName)){ //if there is a default Launcher?
ComponentName DefaultLauncher=new ComponentName("com.android.launcher3","com.android.launcher3.Launcher"); //here set the package name and class name of default launcher.
ArrayList<ResolveInfo> homeActivities = new ArrayList<ResolveInfo>();
ComponentName currentDefaultHome = mPm.getHomeActivities(homeActivities);
ComponentName[] mHomeComponentSet = new ComponentName[homeActivities.size()];
for (int i = 0; i < homeActivities.size(); i++) {
final ResolveInfo candidate = homeActivities.get(i);
Log.d(TAG,"homeActivitie: candidate = "+candidate);
final ActivityInfo activityInfo= candidate.activityInfo;
ComponentName activityName = new ComponentName(activityInfo.packageName, activityInfo.name);
mHomeComponentSet[i] = activityName;
}
IntentFilter mHomeFilter = new IntentFilter(Intent.ACTION_MAIN);
mHomeFilter.addCategory(Intent.CATEGORY_HOME);
mHomeFilter.addCategory(Intent.CATEGORY_DEFAULT);
List<ComponentName>Activities=new ArrayList();
mPm.replacePreferredActivity(mHomeFilter, IntentFilter.MATCH_CATEGORY_EMPTY,mHomeComponentSet, DefaultLauncher);
}
//mtk add end
Intent intent = getHomeIntent();
ActivityInfo aInfo =
resolveActivityInfo(intent, STOCK_PM_FLAGS, userId);
......2, If GMS is preset, you need to modify it as follows:
- Please find the systemReady method of PackageManagerService.java, and add the following example code at the end of the method:
//mtk add start if(isFirstBoot()) { String examplePackageName = "com.android.launcher3"; //default package name of launcher String exampleActivityName = "com.android.launcher3.Launcher"; //default activity name of launcher Intent intent=new Intent(Intent.ACTION_MAIN); intent.addCategory(Intent.CATEGORY_HOME); final int callingUserId = UserHandle.getCallingUserId(); List<ResolveInfo> resolveInfoList = queryIntentActivities(intent,null, PackageManager.GET_META_DATA,callingUserId); if(resolveInfoList != null){ int size = resolveInfoList.size(); for(int j=0;j<size;){ final ResolveInfo r = resolveInfoList.get(j); if(!r.activityInfo.packageName.equals(examplePackageName)) { resolveInfoList.remove(j); size -= 1; } else { j++; } } ComponentName[] set = new ComponentName[size]; ComponentName defaultLauncher=new ComponentName(examplePackageName, exampleActivityName); int defaultMatch=0; for(int i=0;i<size;i++){ final ResolveInfo resolveInfo = resolveInfoList.get(i); Log.d(TAG,"resolveInfo = " + resolveInfo.toString()); set[i] = new ComponentName(resolveInfo.activityInfo.packageName,resolveInfo.activityInfo.name); if(defaultLauncher.getClassName().equals(resolveInfo.activityInfo.name)){ defaultMatch = resolveInfo.match; } } Log.d(TAG,"defaultMatch="+Integer.toHexString(defaultMatch)); IntentFilter filter=new IntentFilter(); filter.addAction(Intent.ACTION_MAIN); filter.addCategory(Intent.CATEGORY_HOME); filter.addCategory(Intent.CATEGORY_DEFAULT); addPreferredActivity2(filter, defaultMatch, set, defaultLauncher); } } //mtk add end - Add addPreferredActivity2 method in PackageManagerService.java:
//mtk add start public void addPreferredActivity2(IntentFilter filter, int match,ComponentName[] set, ComponentName activity) { synchronized (mPackages) { filter.dump(new LogPrinter(Log.INFO, TAG), " "); mSettings.editPreferredActivitiesLPw(0).addFilter(new PreferredActivity(filter, match, set, activity, true)); scheduleWriteSettingsLocked(); } } //mtk add end - Modify the findPreferredActivity method of PackageManagerService.java, and add the following code:
if (removeMatches) { pir.removeFilter(pa); if (DEBUG_PREFERRED) { Slog.v(TAG, "Removing match " + pa.mPref.mComponent); } break; } // Okay we found a previously set preferred or last chosen app. // If the result set is different from when this // was created, we need to clear it and re-ask the // user their preference, if we're looking for an "always" type entry. if (always && !pa.mPref.sameSet(query, priority)) { Slog.i(TAG, "Result set changed, dropping preferred activity for " + intent + " type " + resolvedType); if (DEBUG_PREFERRED) { Slog.v(TAG, "Removing preferred activity since set changed " + pa.mPref.mComponent); } pir.removeFilter(pa); // Re-add the filter as a "last chosen" entry (!always) PreferredActivity lastChosen = new PreferredActivity( pa, pa.mPref.mMatch, null, pa.mPref.mComponent, false); pir.addFilter(lastChosen); mSettings.writePackageRestrictionsLPr(userId); return null; }Revised to:
//mtk add start if(!(intent.getAction() != null && intent.getAction().equals(intent.ACTION_MAIN) && intent.getCategories()!=null && intent.getCategories().contains(intent.CATEGORY_HOME))) { Log.d(TAG,"Home"); }else { if (removeMatches) { pir.removeFilter(pa); if (DEBUG_PREFERRED) { Slog.v(TAG, "Removing match " + pa.mPref.mComponent); } break; } } // Okay we found a previously set preferred or last chosen app. // If the result set is different from when this // was created, we need to clear it and re-ask the // user their preference, if we're looking for an "always" type entry. if (always && !pa.mPref.sameSet(query)) { if(!(intent.getAction() != null && intent.getAction().equals(intent.ACTION_MAIN) && intent.getCategories()!=null && intent.getCategories().contains(intent.CATEGORY_HOME))) { Slog.i(TAG, "Result set changed, dropping preferred activity for " + intent + " type " + resolvedType); if (DEBUG_PREFERRED) { Slog.v(TAG, "Removing preferred activity since set changed " + pa.mPref.mComponent); } pir.removeFilter(pa); // Re-add the filter as a "last chosen" entry (!always) PreferredActivity lastChosen = new PreferredActivity( pa, pa.mPref.mMatch, null, pa.mPref.mComponent, false); pir.addFilter(lastChosen); mSettings.writePackageRestrictionsLPr(userId); return null; } } //mtk add end