Android(安卓)清除默认launcher 改为其他的launcher

Android 清除默认launcher 改为其他的launcher

        //clear the current preferred launcher                ArrayList intentList = new ArrayList();                ArrayList cnList = new ArrayList();                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());                //清除原有的默认launcher                }      // 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.activityInfo.packageName.equals(packageName)) {             bestMatch = r.match;             Log.d(TAG, "bestMatch: " + r.activityInfo.packageName);         }     }     // add the default launcher as the preferred launcher     ComponentName launcher = new ComponentName(packageName, className);     mContext.getPackageManager().addPreferredActivity(filter, bestMatch, set, launcher);

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