如何创建一个whatsapp按钮向我的Android应用程序中的特定联系人发送消息？ [复制]

Question

这是我将我的网站调用到 webview 的代码：

class MainActivity : AppCompatActivity() {
    var website = "https://serrajimmobilier.ma/"
    override fun onCreate(savedInstanceState: Bundle?) {
            super.onCreate(savedInstanceState)
            supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
            setContentView(R.layout.activity_main)
    webView.loadUrl(website)
            webView.settings.javaScriptEnabled = true;
            webView.webViewClient = CallBack()}
    class CallBack : WebViewClient (){
    override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest): Boolean {
                return false;}}}

问题是当我导出我的 apk 时，whatssap 按钮不起作用error when I click into button whatssap

Answer 1

您的问题是您正在使用 WebView，并且 WebView 尝试仅通过链接打开 Whatsapp 应用程序。

您可以覆盖 shouldOverrideUrlLoading 方法，以便如果 url 以 whatsapp 架构开头，则为 whatsapp 创建一个意图：

@Override
fun shouldOverrideUrlLoading(view: WebView, url: String?): Boolean {
    if (url != null && url.startsWith("whatsapp://")) {
        val txtPattern = "&text=([^&]+)".toRegex()
        val match = pattern.find(txtPattern)
        val sendIntent = Intent()
        sendIntent.setAction(Intent.ACTION_SEND)
        sendIntent.putExtra(Intent.EXTRA_TEXT, match?.value :? "Extra text")
        sendIntent.setType("text/plain")
        sendIntent.setPackage("com.whatsapp")
        startActivity(sendIntent)
        return true
    } else {
        // Whatsapp is not installed
        return false
    }
}

更新

要向特定电话号码发送消息，请尝试以下操作：

@Override
fun shouldOverrideUrlLoading(view: WebView, url: String?): Boolean {
    if (url != null && url.startsWith("whatsapp://")) {
        val patternPhone = "phone=([^&]+)".toRegex()
        val matchPhone = pattern.find(patternPhone)
        val uri = Uri.parse("smsto:" + matchPhone?.value)
        val sendIntent = Intent(Intent.ACTION_SENDTO, uri)
        sendIntent.setPackage("com.whatsapp")
        val shareIntent = Intent.createChooser(sendIntent, null)
        startActivity(shareIntent)
        return true
    } else {
        // Whatsapp is not installed
        return false
    }
}