Android系统自带分享图片功能

Util.startShareImage(this) //this为当前的Activity实例

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

/** * 系统分享图片功能 * Created by wiky on 2018/1/13. */object Util {  fun startShareImage(activity: Activity) {    //过滤出需要分享到对应的平台：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")    /** * 分享图片 */    val bitmap = getImageFromAssetsFile(activity, "img_share.jpg") //从assets目录中取到对应的文件，文件名自行修改    val localImage = saveBitmap(bitmap!!, "share.jpg")  //分享前，需要先将图片存在本地（记得添加权限），文件名自行修改    val shareIntent = Intent(Intent.ACTION_SEND)    shareIntent.type = "image/*" //设置分享内容的类型：图片    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/*" //设置分享内容的类型          val activityInfo = info.activityInfo          //如果还需要分享至其它平台，可以打印出具体信息，然后找到对应的Activity名称，填入上面的数组中即可//         println("package = ${activityInfo.packageName}, activity = ${activityInfo.name}")          //进行过滤（只显示需要分享的平台）          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), "选择要分享到的平台")        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())    }  }  /** * 从Assets中读取图片 */  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  }  /** * 将图片存到本地 */  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  }}