Android中的桌面快捷方式

一、判断是否已有快捷方式

    private String getAuthorityFromPermission(Context context, String permission){
        if (permission == null) return null;
        List<PackageInfo> packs = context.getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS);
        if (packs != null) {
            for (PackageInfo pack : packs) { 
                ProviderInfo[] providers = pack.providers; 
                if (providers != null) { 
                    for (ProviderInfo provider : providers) { 
                        if (permission.equals(provider.readPermission)) return provider.authority;
                        if (permission.equals(provider.writePermission)) return provider.authority;
                    } 
                }
            }
        }
        
        return null;
    }

private boolean hasShortcut(Context context,String shortCutName)
    {
        boolean has = false;
        final ContentResolver cr = context.getContentResolver();
        final String AUTHORITY = getAuthorityFromPermission(context, "com.android.launcher.permission.READ_SETTINGS");

        final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/favorites?notify=true");
        
        //确认content Provider中是否有快捷键信息
        Cursor c = cr.query(CONTENT_URI,
                            new String[] {"title","iconResource" },
                            "title=?",
                            new String[] {shortCutString.trim()}, 
                            null);
        if(c != null && c.getCount() > 0){
            has= true ;
        }
        return has;
    }

二、添加快捷方式

private void addShortCut(Context mContext)
    {              

        boolean has = hasShortcut(mContext, mContext.getString(R.string.str_app_name));

        if(has)
        {
            return;
        }

        Intent shortCutIntent = null;
        int shortCutNameId = R.string.app_name;
        int shortCutIconId = R.drawable.app_icon;
        String pkg = PACKAGE_NAME;

        boolean installed = isInstalledApp(mContext);


        if(installed)
        {

            Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
            resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
            resolveIntent.setPackage(pkg);          
            List<ResolveInfo> apps = mContext.getPackageManager().queryIntentActivities(resolveIntent, PackageManager.GET_ACTIVITIES);
            

            shortCutIntent = new Intent();
            if((apps != null) && (apps.size() != 0))
            {
                shortCutIntent.setComponent(new ComponentName(pkg, apps.get(0).activityInfo.name));
            }
        }
        else 
        {
            shortCutIntent = new Intent(mContext.getApplicationContext(), AppActivity.class);
        }
        

        Intent shortcut = new Intent("com.android.launcher.action.INSTALL_SHORTCUT");  
        
        //快捷方式的名称  
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, mContext.getString(shortCutNameId));  
        shortcut.putExtra("duplicate", false); //不允许重复创建  
 
        //快捷方式的图标  
        ShortcutIconResource iconRes = Intent.ShortcutIconResource.fromContext(mContext.getApplicationContext(), shortCutIconId);  
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, iconRes);  
        
        //程序入口
        shortCutIntent.setAction(Intent.ACTION_MAIN);
        shortCutIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortCutIntent);

        mContext.sendBroadcast(shortcut);   
    }

三、删除快捷方式

   private void deleteShortCut(Context mContext)
    {
        Intent shortcut = new Intent("com.android.launcher.action.UNINSTALL_SHORTCUT");
        Intent shortCutIntent = new Intent(mContext.getApplicationContext(), AppActivity.class);
        shortCutIntent.setAction(Intent.ACTION_MAIN);
        shortCutIntent.addCategory(Intent.CATEGORY_LAUNCHER);

        // 快捷方式的名称
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, mContext.getString(R.string.app_name));

        // 注意: ComponentName的第二个参数必须是完整的类名（包名+类名），否则无法删除快捷方式
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortCutIntent);

        mContext.sendBroadcast(shortcut);
    }

四、被快捷方式启动的Activity的Intent-filter

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>