android动态修改app桌面icon

原理：
在Manifest文件中，使用标签为我们的入口Activity准备多个，拥有标签的activity是为了指向入口Activity，每个拥有标签的activity都可以单独设置一个icon，在程序中我们动态设置，然后kill掉launcher，等launcher重启后，icon就替换了
注意：kill掉launcher需加权限

代码：Manifest.xml:

code:

private void setIcon(String activity_alias) {  
        Context ctx = MyApplication.getContext();  
        PackageManager pm = ctx.getPackageManager();  
        ActivityManager am = (ActivityManager) ctx.getSystemService(Activity.ACTIVITY_SERVICE);  
   
        // Enable/disable activity-aliases  
        pm.setComponentEnabledSetting(  
                new ComponentName(ctx, ACTIVITY_ALIAS_1),  
                ACTIVITY_ALIAS_1.equals(activity_alias) ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED  
                        : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,  
                PackageManager.DONT_KILL_APP);  
        pm.setComponentEnabledSetting(  
                new ComponentName(ctx, ACTIVITY_ALIAS_2),  
                ACTIVITY_ALIAS_2.equals(activity_alias) ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED  
                        : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,  
                PackageManager.DONT_KILL_APP);  
   
        // Find launcher and kill it  
        Intent i = new Intent(Intent.ACTION_MAIN);  
        i.addCategory(Intent.CATEGORY_HOME);  
        i.addCategory(Intent.CATEGORY_DEFAULT);  
        List resolves = pm.queryIntentActivities(i, 0);  
        for (ResolveInfo res : resolves) {  
            if (res.activityInfo != null) {  
                am.killBackgroundProcesses(res.activityInfo.packageName);  
            }  
        }  
    }