android 13 设置默认launcher

 .../internal/app/ResolverActivity.java        | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/frameworks/base/core/java/com/android/internal/app/ResolverActivity.java b/frameworks/base/core/java/com/android/internal/app/ResolverActivity.java
index 6c11f41a139..e58cedb59b3 100644
--- a/frameworks/base/core/java/com/android/internal/app/ResolverActivity.java
+++ b/frameworks/base/core/java/com/android/internal/app/ResolverActivity.java
@@ -90,6 +90,18 @@ import android.widget.TabWidget;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.ActivityInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.provider.Settings;
+import android.text.TextUtils;
+import android.util.Log;
+
 import com.android.internal.R;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.app.AbstractMultiProfilePagerAdapter.Profile;
@@ -368,12 +380,57 @@ public class ResolverActivity extends Activity implements
                 supportsAlwaysUseOption);
     }
 
+
+    //set default launcher
+    private void setDefaultLauncher(){
+        Log.d("dbg","setDefaultLauncher");
+        final PackageManager mPm = getPackageManager();
+        Intent homeIntent = new Intent();
+        homeIntent.addCategory(Intent.CATEGORY_HOME);
+        homeIntent.setAction(Intent.ACTION_MAIN);
+        homeIntent.addCategory(Intent.CATEGORY_DEFAULT);
+
+        //get CurrentLauncher
+        ResolveInfo info = mPm.resolveActivity(homeIntent, 0);
+        String currentPkg = "android";
+               if (info != null && !TextUtils.isEmpty(info.activityInfo.packageName)
+        && !TextUtils.equals(info.activityInfo.packageName, "android")) {
+            currentPkg =  info.activityInfo.packageName;
+        }
+        if (TextUtils.equals(info.activityInfo.packageName, "android")) { //if there is a default Launcher?
+            String defaultlauncherpckname="your_launcher_package_name";
+            String defaultlauncherclsname="your_launcher_activity_class_name";
+            ComponentName DefaultLauncher = new ComponentName(defaultlauncherpckname, defaultlauncherclsname);
+            ArrayList homeActivities = new ArrayList();
+            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);
+                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 Activities = new ArrayList();
+            mPm.replacePreferredActivity(mHomeFilter, IntentFilter.MATCH_CATEGORY_EMPTY, mHomeComponentSet, DefaultLauncher);
+        }
+    }
+
+
     protected void onCreate(Bundle savedInstanceState, Intent intent,
             CharSequence title, int defaultTitleRes, Intent[] initialIntents,
             List rList, boolean supportsAlwaysUseOption) {
         setTheme(appliedThemeResId());
         super.onCreate(savedInstanceState);
 
+        if(mResolvingHome){
+            setDefaultLauncher();
+            finish();
+            return;
+        }
         // Determine whether we should show that intent is forwarded
         // from managed profile to owner or other way around.
         setProfileSwitchMessage(intent.getContentUserHint());

打入上面的patch，修改包名类名成你的launcher的包名，类名打包即可。