Android根据APP包名启动应用

     public void openApp(String packageName, Context context) {
         PackageManager packageManager = context.getPackageManager();
         Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
         resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
         resolveIntent.setPackage(packageName);

         List<ResolveInfo> apps = packageManager.queryIntentActivities(
                 resolveIntent, 0);

         ResolveInfo ri = apps.iterator().next();
         if (ri != null) {
             String className = ri.activityInfo.name;

             Intent intent = new Intent(Intent.ACTION_MAIN);
             intent.addCategory(Intent.CATEGORY_LAUNCHER);
             intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
             ComponentName cn = new ComponentName(packageName, className);

             intent.setComponent(cn);
             context.startActivity(intent);
         }
     }