A20啓動LUNCH選項修改

代碼路徑：

android\frameworks\base\core\java\com\android\internal\app\ResolverActivity.java

        private void rebuildList() {
            if (mBaseResolveList != null) {
                mCurrentResolveList = mBaseResolveList;
            } else {
                mCurrentResolveList = mPm.queryIntentActivities(
                        mIntent, PackageManager.MATCH_DEFAULT_ONLY
                        | (mAlwaysUseOption ? PackageManager.GET_RESOLVED_FILTER : 0));
                // Filter out any activities that the launched uid does not
                // have permission for.  We don't do this when we have an explicit
                // list of resolved activities, because that only happens when
                // we are being subclassed, so we can safely launch whatever
                // they gave us.
                if (mCurrentResolveList != null) {
                    for (int i=mCurrentResolveList.size()-1; i >= 0; i--) {
                        ActivityInfo ai = mCurrentResolveList.get(i).activityInfo;
                        int granted = ActivityManager.checkComponentPermission(
                                ai.permission, mLaunchedFromUid,
                                ai.applicationInfo.uid, ai.exported);
                        if (granted != PackageManager.PERMISSION_GRANTED) {
                            // Access not allowed!
                            mCurrentResolveList.remove(i);
                        }
                    }
                }
            }
            int N;
            if ((mCurrentResolveList != null) && ((N = mCurrentResolveList.size()) > 0)) {
                // Only display the first matches that are either of equal
                // priority or have asked to be default options.
                ResolveInfo r0 = mCurrentResolveList.get(0);
                for (int i=1; i<N; i++) {
                    ResolveInfo ri = mCurrentResolveList.get(i);
                    if (false) Log.v(
                        "ResolveListActivity",
                        r0.activityInfo.name + "=" +
                        r0.priority + "/" + r0.isDefault + " vs " +
                        ri.activityInfo.name + "=" +
                        ri.priority + "/" + ri.isDefault + N);
                   if (r0.priority != ri.priority ||
                        r0.isDefault != ri.isDefault) {
                        while (i < N) {
                            mCurrentResolveList.remove(i);
                            N--;
                        }
                    }
                }
                if (N > 1) {
                    ResolveInfo.DisplayNameComparator rComparator =
                            new ResolveInfo.DisplayNameComparator(mPm);
                    Collections.sort(mCurrentResolveList, rComparator);
                }
                
                mList = new ArrayList<DisplayResolveInfo>();
                
                // First put the initial items at the top.
                if (mInitialIntents != null) {
                    for (int i=0; i<mInitialIntents.length; i++) {
                        Intent ii = mInitialIntents[i];
                        if (ii == null) {
                            continue;
                        }
                        ActivityInfo ai = ii.resolveActivityInfo(
                                getPackageManager(), 0);
                        if (ai == null) {
                            Log.w("ResolverActivity", "No activity found for "
                                    + ii);
                            continue;
                        }
                        ResolveInfo ri = new ResolveInfo();
                        ri.activityInfo = ai;
                        if (ii instanceof LabeledIntent) {
                            LabeledIntent li = (LabeledIntent)ii;
                            ri.resolvePackageName = li.getSourcePackage();
                            ri.labelRes = li.getLabelResource();
                            ri.nonLocalizedLabel = li.getNonLocalizedLabel();
                            ri.icon = li.getIconResource();
                        }
                        Log.e(TAG,"ResolveListAdapter" + ri.resolvePackageName);
                        mList.add(new DisplayResolveInfo(ri,
                                ri.loadLabel(getPackageManager()), null, ii));
                    }
                }
                
                // Check for applications with same name and use application name or
                // package name if necessary
                r0 = mCurrentResolveList.get(0);
                int start = 0;
                CharSequence r0Label =  r0.loadLabel(mPm);
                mShowExtended = false;
//                for (int i = 1; i < N; i++) {
//                    if (r0Label == null) {
//                        r0Label = r0.activityInfo.packageName;
//                    }
//                    //Log.e(TAG,"r0Label" + r0.activityInfo.packageName);
//                    ResolveInfo ri = mCurrentResolveList.get(i);
//                    CharSequence riLabel = ri.loadLabel(mPm);
//                    if (riLabel == null) {
//                        riLabel = ri.activityInfo.packageName;
//                    }
//                    if (riLabel.equals(r0Label)) {
//                        continue;
//                    }
//                    processGroup(mCurrentResolveList, start, (i-1), r0, r0Label);
//                    r0 = ri;
//                    r0Label = riLabel;
//                    start = i;
//                }//delete by wangjian 2014.06.19
//                // Process last group
//                processGroup(mCurrentResolveList, start, (N-1), r0, r0Label);
                                    //******add by wangjian 2014.06.19*****//   

if(N == 2){

ResolveInfo r1 = mCurrentResolveList.get(1);

CharSequence r1Label = r1.activityInfo.packageName;

if(r1 != null && r1Label != null){

//Log.v(TAG,"r1Label:" + r1.activityInfo.name);

//Log.v(TAG,"r1Label:" + r1.activityInfo.packageName);

processGroup(mCurrentResolveList, 1, 1, r1, r1Label);

}

}else{

// Log.v(TAG,"r0Label:" + r0.activityInfo.name);

//Log.v(TAG,"r0Label:" + r0.activityInfo.packageName);

processGroup(mCurrentResolveList, 0, 0, r0, r0Label);

}

                                                            

                                    //***********add code end*************//
            }
        }

 ResolveInfo r1 = mCurrentResolveList.get(1);//從列表中得到本身的啓動項

 CharSequence r1Label = r1.activityInfo.packageName;//獲得本身啓動項的包名

ps：以上方法只適合存在兩個啓動項，一個是默認的系統啓動項，一個是本身的app。

關鍵是這個方法須要注意：processGroup(mCurrentResolveList, 1, 1, r1, r1Label);

這個方法的實現：

        private void processGroup(List<ResolveInfo> rList, int start, int end, ResolveInfo ro,
                CharSequence roLabel) {
            // Process labels from start to i
            Log.e(TAG, "processGroup");
            int num = end - start+1;
            if (num == 1) {//若是num爲1默認的把參數roLabel做爲啓動項，咱們要的就是這個效果，當有兩個啓動項時按下HOME鍵不要選擇，默認的把咱們的APP做爲啓動項.

                // No duplicate labels. Use label for entry at start                mList.add(new DisplayResolveInfo(ro, roLabel, null, null));            } else {                mShowExtended = true;                boolean usePkg = false;                CharSequence startApp = ro.activityInfo.applicationInfo.loadLabel(mPm);                if (startApp == null) {                    usePkg = true;                }                if (!usePkg) {                    // Use HashSet to track duplicates                    HashSet<CharSequence> duplicates =                        new HashSet<CharSequence>();                    duplicates.add(startApp);                    for (int j = start+1; j <= end ; j++) {                        ResolveInfo jRi = rList.get(j);                        CharSequence jApp = jRi.activityInfo.applicationInfo.loadLabel(mPm);                        if ( (jApp == null) || (duplicates.contains(jApp))) {                            usePkg = true;                            break;                        } else {                            duplicates.add(jApp);                        }                    }                    // Clear HashSet for later use                    duplicates.clear();                }                for (int k = start; k <= end; k++) {                    ResolveInfo add = rList.get(k);                    if (usePkg) {                        // Use application name for all entries from start to end-1                        mList.add(new DisplayResolveInfo(add, roLabel,                                add.activityInfo.packageName, null));                    } else {                        // Use package name for all entries from start to end-1                        mList.add(new DisplayResolveInfo(add, roLabel,                                add.activityInfo.applicationInfo.loadLabel(mPm), null));                    }                }            }        }