FaceBook,whatAPP,ins,等海外软件，传入包名分享图片

object PicShareUtils {
    val PACKAGE_NAME_FB = "com.facebook.katana"
    val PACKAGE_NAME_WHATSAPP = "com.whatsapp"
    val PACKAGE_NAME_INSTAGRAM = "com.instagram.android"
    private val SHARE_TYPE_TEXT = "text/plain"
    private val SHARE_TYPE_IMAGE = "image/*"
    val REQUEST_CODE = 10

    /**
     * 指定包名分享
     *
     * @param packName 如果==null则跳系统分享
     * @param content
     * @return
     */
    fun doPicShare(context: Activity?, packName: String?, inviteCode: String): Boolean {
        if (context == null)
            return false
        val bitmap = createShareBitmap(context, inviteCode)

        val uri = Uri.parse(MediaStore.Images.Media.insertImage(MainApp.S_INSTANCE.contentResolver, bitmap, null, null))

        if (uri == null) {
            return false
        }
        val intent: Intent = (if (packName != null)
            queryShareIntent(context, packName)
        else
            Intent("android.intent.action.VIEW")) ?: return false
        intent.action = Intent.ACTION_SEND//设置分享行为
        intent.type = SHARE_TYPE_IMAGE
        intent.putExtra(Intent.EXTRA_SUBJECT, context.getText(R.string.app_name))
        intent.putExtra(Intent.EXTRA_TITLE,context.getText(R.string.app_name))
        intent.putExtra(Intent.EXTRA_STREAM, uri)
        context.startActivityForResult(Intent.createChooser(intent, context.getText(R.string.app_name)), REQUEST_CODE)
        return true
    }

    /**
     * 生成分享自定义主题的bitmap图片
     * screenShot 对应一个自定义主题bitmap的路径
     */
    fun createShareBitmap(context: Context, screenShot: String): Bitmap {
        val themeBitmap = BitmapFactory.decodeFile(screenShot)
        val inflater = LayoutInflater.from(context)
        val inviteView = inflater.inflate(R.layout.custom_share_item, null)
        val img = inviteView.findViewById(R.id.custom_theme_img) as ImageView
        val draw = BitmapDrawable(themeBitmap)
        img.image = draw
        inviteView.isDrawingCacheEnabled = true
        inviteView.measure(
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED))
        inviteView.layout(0, 0,
                inviteView.measuredWidth,
                inviteView.measuredHeight)

        inviteView.buildDrawingCache()
        val cacheBitmap = inviteView.drawingCache
        return Bitmap.createBitmap(cacheBitmap)
    }

    private fun getShareIntent(context: Context, type: String): Intent {
        // 去掉后缀-魏工
        val intent = Intent(Intent.ACTION_SEND)
        intent.type = type
        intent.putExtra(Intent.EXTRA_SUBJECT, context.getString(R.string.app_name))
        intent.putExtra(Intent.EXTRA_TITLE, context.getString(R.string.app_name))
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
        return intent
    }

    private fun queryShareIntent(context: Context, packName: String): Intent? {
        val defIntent = getShareIntent(context, SHARE_TYPE_TEXT)
        val shareTextApps = context.packageManager.queryIntentActivities(defIntent, 0)
        val shareImageIntent = getShareIntent(context, SHARE_TYPE_IMAGE)
        val otherApps = context.packageManager.queryIntentActivities(shareImageIntent, 0)
        otherApps.addAll(shareTextApps) // 考虑到Instagram只能分享图片，因此需要合并2个可分享的应用列表

        for (otherApp in otherApps) {
            val otherAppActivity = otherApp.activityInfo
            val shareIntent: Intent
            if (TextUtils.equals(packName, otherAppActivity.packageName)) {
                if (TextUtils.equals(packName, PACKAGE_NAME_FB)) { // 如果是fb则统计修改参数
                    shareIntent = getShareIntent(context, SHARE_TYPE_TEXT)
                } else {
                    shareIntent = Intent(defIntent)
                }
                val componentName = ComponentName(
                        otherAppActivity.applicationInfo.packageName,
                        otherAppActivity.name
                )
                shareIntent.component = componentName
                return shareIntent
            }
        }
        return null
    }

    /**
     * 手机是否安装某个app
     */
     fun isAppInstalled(context: Context, packageName: String?): Boolean {
        val pm = context.packageManager
        //如果包名为空，返回true，则进行系统分享(其他情况慎用)
        if(packageName == null) return true
        return try {
            pm.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES)
            true
        } catch (e: PackageManager.NameNotFoundException) {
            false
        }
    }
}