Android 7.0 MTK Set Default Desktop

This article example for everyone to share Android7.0 MTK set the default desktop specific code, for your reference, the specific content is as follows

Project Requirements: Customers install their own desktop apk, and automatically set it as the default desktop after installation, and do not pop up the always and only once pop-up box

1. Find the file to install the application

frameworks\base\services\core\java\com\android\server\pm\PackageManagerService.java

 try {
   PackageParser.Package newPackage = scanPackageTracedLI(pkg, policyFlags, scanFlags,
     System.currentTimeMillis(), user);

   updateSettingsLI(newPackage, installerPackageName, null, res, user);

   if (res.returnCode == PackageManager.INSTALL_SUCCEEDED) {
 
 
    prepareAppDataAfterInstallLIF(newPackage);
 

 Log.d("yh", "pkgName " +pkgName);
 //  Due to the confidentiality of customers' applications,   Use the name of the bag on the dessert table here ---com.dianxinos.dxhome
 if (pkgName.equals("com.dianxinos.dxhome")){
  // Send a broadcast 
  Intent intent = new  Intent("android.intent.action.UPDATE_LANUCHER_APPS");
  mContext.sendBroadcast(intent);
 }
    //------------------------


   } else {
    // Remove package from internal structures, but keep around any
    // data that might have already existed
    deletePackageLIF(pkgName, UserHandle.ALL, false, null,
      PackageManager.DELETE_KEEP_DATA, res.removedInfo, true, null);
   }
  } catch (PackageManagerException e) {
   res.setError("Package couldn't be installed in " + pkg.codePath, e);
  }

  Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
 }

2. Since the default desktop is set in Settings, broadcast recipients add and set the default desktop in settings (add files under packages\ apps\ Settings\ src\ com\ android\ settings-UpdateLanucherReceiver. java)

package com.android.settings;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.ComponentName;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import java.util.ArrayList;
import android.util.Log;
import android.content.pm.ActivityInfo;
import java.util.List;


public class UpdateLanucherReceiver extends BroadcastReceiver {
 
 public UpdateLanucherReceiver() {
 }
 
 @Override
 public void onReceive(Context context, Intent intent) {
  if (intent.getAction().equals("android.intent.action.UPDATE_LANUCHER_APPS")) {
 Log.e("yhyh" ," onReceive");
 
 final PackageManager mPm = context.getPackageManager();

   //  Package name and class name of snack desktop  com.dianxinos.dxhome / com.nd.hilauncherdev.launcher.Launcher Set the default desktop 
 ComponentName DefaultLauncher=new ComponentName(" com.dianxinos.dxhome",
     "com.nd.hilauncherdev.launcher.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.e("yhyh","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);
   
 // Refresh the desktop 
  Intent intent2 = new Intent(Intent.ACTION_MAIN);
   intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
   intent2.addCategory(Intent.CATEGORY_HOME);
   context.startActivity(intent2);
 }
 }
}

3.packages\apps\Settings\AndroidManifest.xml

<!-- yh -->
 <receiver
   android:name=".UpdateLanucherReceiver" >
   <intent-filter>
    <action android:name="android.intent.action.UPDATE_LANUCHER_APPS" />
   </intent-filter>
</receiver>