android webview内H5调用微信支付问题

问题

商家参数格式有误，请联系商家解决

微信文档描述

https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15_4

解决方法

文档说明白了，要在请求头上加上Refrence，
注意并不是在加载webview时加上请求头，

而是在调用微信支付的时候加上这个请求头

   override fun shouldOverrideUrlLoading(view: WebView?, url: String?): Boolean {
            return try {
                if (url!!.startsWith("http:") || url.startsWith("https:")) {
                    val wvHead: MutableMap<String, String> = HashMap()
                    wvHead["Referer"] = Referer
                    view!!.loadUrl(url, wvHead)
                } else {
                    val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
                    startActivity(intent)
                }
                true
            } catch (e: Exception) {
                false
            }
        }

完整程序

package com.wuzhao.ktt.wvtaste
import android.annotation.SuppressLint
import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.util.Log
import android.view.KeyEvent
import android.webkit.WebView
import android.webkit.WebViewClient
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import com.wuzhao.ktt.R
import kotlin.system.exitProcess
class WebViewTaste : AppCompatActivity() {
    private lateinit var wv: WebView
    companion object {
        // 定义WebView首页地址[伴生对象]
        const val WEB_URL = "你的webview url"
        const val Referer = "申请的地址"
    }
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_web_view_taste)
        initWv()
    }
    @SuppressLint("SetJavaScriptEnabled")
    fun initWv() {
        wv = findViewById<WebView>(R.id.wv)
        wv.settings.javaScriptEnabled = true
        wv.webViewClient = webClient
        wv.loadUrl(WEB_URL)
    }
    private val webClient = object : WebViewClient() {
        override fun shouldOverrideUrlLoading(view: WebView?, url: String?): Boolean {
            return try {
                if (url!!.startsWith("http:") || url.startsWith("https:")) {
                    val wvHead: MutableMap<String, String> = HashMap()
                    wvHead["Referer"] = Referer
                    view!!.loadUrl(url, wvHead)
                } else {
                    val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
                    startActivity(intent)
                }
                true
            } catch (e: Exception) {
                false
            }
        }
    }
    override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
        return if ((keyCode == KeyEvent.KEYCODE_BACK)) {
            if (wv.canGoBack()) {
                wv.goBack()//返回上一页面
                true
            } else {
                AlertDialog.Builder(this@WebViewTaste)
                    .setTitle("退出") //设置对话框标题
                    .setMessage("确定要退出？") //设置显示的内容
                    .setPositiveButton(
                        "确定"
                    ) { _, _ ->
                        exitProcess(0)//退出程序
                    }.setNegativeButton(
                        "取消"
                    ) { _, _ ->
                    }.show()
                false
            }
        } else {
            super.onKeyDown(keyCode, event)
        }
    }
}