Util.startShareImage(this) //this為當前的Activity實例

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

/** * 系統分享圖片功能 * Created by wiky on 2018/1/13. */object Util { fun startShareImage(activity: Activity) {  //過濾出需要分享到對應的平臺：微信好友、朋友圈、QQ好友。 可自行修改  val targetApp = arrayOf("com.tencent.mm.ui.tools.ShareImgUI", "com.tencent.mm.ui.tools.ShareToTimeLineUI", "com.tencent.mobileqq.activity.JumpActivity")  /** * 分享圖片 */  val bitmap = getImageFromAssetsFile(activity, "img_share.jpg") //從assets目錄中取到對應的文件，文件名自行修改  val localImage = saveBitmap(bitmap!!, "share.jpg") //分享前，需要先將圖片存在本地（記得添加權限），文件名自行修改  val shareIntent = Intent(Intent.ACTION_SEND)  shareIntent.type = "image/*" //設置分享內容的類型：圖片  shareIntent.putExtra(Intent.EXTRA_STREAM, localImage)  try {   val resInfo = activity.packageManager.queryIntentActivities(shareIntent, 0)   if (!resInfo.isEmpty()) {    val targetedShareIntents = ArrayList<Intent>()    for (info in resInfo) {     val targeted = Intent(Intent.ACTION_SEND)     targeted.type = "image/*" //設置分享內容的類型     val activityInfo = info.activityInfo     //如果還需要分享至其它平臺，可以打印出具體信息，然后找到對應的Activity名稱，填入上面的數組中即可//     println("package = ${activityInfo.packageName}, activity = ${activityInfo.name}")     //進行過濾（只顯示需要分享的平臺）     if (targetApp.any { it == activityInfo.name }) {      val comp = ComponentName(activityInfo.packageName, activityInfo.name)      targeted.component = comp      targeted.putExtra(Intent.EXTRA_STREAM, localImage)      targetedShareIntents.add(targeted)     }    }    val chooserIntent = Intent.createChooser(targetedShareIntents.removeAt(0), "選擇要分享到的平臺")    if (chooserIntent != null) {     chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, targetedShareIntents.toTypedArray<Parcelable>())     activity.startActivity(chooserIntent)    }   }  } catch (e: Exception) {   Log.e(StatConstants.LOG_TAG, "Unable to share image, logs : " + e.toString())  } } /** * 從Assets中讀取圖片 */ private fun getImageFromAssetsFile(context: Context, fileName: String): Bitmap? {  var image: Bitmap? = null  val am = context.resources.assets  try {   val inputStream = am.open(fileName)   image = BitmapFactory.decodeStream(inputStream)   inputStream.close()  } catch (e: IOException) {   e.printStackTrace()  }  return image } /** * 將圖片存到本地 */ private fun saveBitmap(bm: Bitmap, picName: String): Uri? {  try {   val dir = Environment.getExternalStorageDirectory().absolutePath + File.separator + picName   val f = File(dir)   if (!f.exists()) {    f.parentFile.mkdirs()    f.createNewFile()   }   val out = FileOutputStream(f)   bm.compress(Bitmap.CompressFormat.JPEG, 90, out)   out.flush()   out.close()   return Uri.fromFile(f)  } catch (e: FileNotFoundException) {   e.printStackTrace()  } catch (e: IOException) {   e.printStackTrace()  }  return null }}