如何在Android应用程序中使用Intent打开WhatsApp

我想让你直接控制WhatsApp。因此，当用户点击按钮时，其意图应该是将您带到WhatsApp。 这是我在遵循一些指导原则后编写的代码，但它不起作用

buttonWhatsapp.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // Performs action on click
            Intent sendIntent = new Intent();
            sendIntent.setAction(Intent.ACTION_SEND);
            sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
            sendIntent.setType("text/plain");
            sendIntent.setPackage("com.whatsapp");
            startActivity(Intent.createChooser(sendIntent, ""));
            startActivity(sendIntent);
            //opens the portfolio details class
        }
    });

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我在这里向您展示如何共享文本和图像， 对于共享文本，您可以使用以下代码

private void shareTextUrl() {
    Intent share = new Intent(android.content.Intent.ACTION_SEND);
    share.setType("text/plain");
    share.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);

    // Add data to the intent, the receiving app will decide
    // what to do with it.
    share.putExtra(Intent.EXTRA_SUBJECT, "Title Of The Post");
    share.putExtra(Intent.EXTRA_TEXT, "http://www.codeofaninja.com");

    startActivity(Intent.createChooser(share, "Share link!"));
}

private void shareImage() {
    Intent share = new Intent(Intent.ACTION_SEND);

    // If you want to share a png image only, you can do:
    // setType("image/png"); OR for jpeg: setType("image/jpeg");
    share.setType("image/*");

    // Make sure you put example png image named myImage.png in your
    // directory
    String imagePath = Environment.getExternalStorageDirectory()
            + "/myImage.png";

    File imageFileToShare = new File(imagePath);

    Uri uri = Uri.fromFile(imageFileToShare);
    share.putExtra(Intent.EXTRA_STREAM, uri);

    startActivity(Intent.createChooser(share, "Share Image!"));
}

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现在，如果您想共享图像，那么您可以使用这些代码

private void shareTextUrl() {
    Intent share = new Intent(android.content.Intent.ACTION_SEND);
    share.setType("text/plain");
    share.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);

    // Add data to the intent, the receiving app will decide
    // what to do with it.
    share.putExtra(Intent.EXTRA_SUBJECT, "Title Of The Post");
    share.putExtra(Intent.EXTRA_TEXT, "http://www.codeofaninja.com");

    startActivity(Intent.createChooser(share, "Share link!"));
}

private void shareImage() {
    Intent share = new Intent(Intent.ACTION_SEND);

    // If you want to share a png image only, you can do:
    // setType("image/png"); OR for jpeg: setType("image/jpeg");
    share.setType("image/*");

    // Make sure you put example png image named myImage.png in your
    // directory
    String imagePath = Environment.getExternalStorageDirectory()
            + "/myImage.png";

    File imageFileToShare = new File(imagePath);

    Uri uri = Uri.fromFile(imageFileToShare);
    share.putExtra(Intent.EXTRA_STREAM, uri);

    startActivity(Intent.createChooser(share, "Share Image!"));
}

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嘿，这个片段来自whatsapp官方网站

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我知道的最简单的方法是调用以下方法（使用字符串变量（message）输入要通过WhatAapp发送的文本）：

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我希望这对您有所帮助。

使用2018 api：

String url = "https://api.whatsapp.com/send?phone="+number;
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);

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这在2021年非常有效

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简短形式的扩展：

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数字电话

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mensaje=要发送的消息

private void openWhatsApp(String numero,String mensaje){

    try{
        PackageManager packageManager = getActivity().getPackageManager();
        Intent i = new Intent(Intent.ACTION_VIEW);
        String url = "https://api.whatsapp.com/send?phone="+ numero +"&text=" + URLEncoder.encode(mensaje, "UTF-8");
        i.setPackage("com.whatsapp");
        i.setData(Uri.parse(url));
        if (i.resolveActivity(packageManager) != null) {
            startActivity(i);
        }else {
            KToast.errorToast(getActivity(), getString(R.string.no_whatsapp), Gravity.BOTTOM, KToast.LENGTH_SHORT);
        }
    } catch(Exception e) {
        Log.e("ERROR WHATSAPP",e.toString());
        KToast.errorToast(getActivity(), getString(R.string.no_whatsapp), Gravity.BOTTOM, KToast.LENGTH_SHORT);
    }

}

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希望，这有帮助

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这个代码对我有用

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检查此方法

 private void openWhatsApp(String smsNumber) {
    Intent sendIntent = new Intent(Intent.ACTION_SEND);
    sendIntent.setType("text/plain");
    sendIntent.putExtra(Intent.EXTRA_TEXT, "Hi, This is " + PreferenceManager.get(this, Constants.USERNAME));
    sendIntent.putExtra("jid", smsNumber + "@s.whatsapp.net"); //phone number without "+" prefix
    sendIntent.setPackage("com.whatsapp");
    if (sendIntent.resolveActivity(getPackageManager()) == null) {
        Toast.makeText(this, "Error/n", Toast.LENGTH_SHORT).show();
        return;
    }
    startActivity(sendIntent);
}

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这是几天前的工作

 private void openWhatsApp(String number) {
    try {
        number = number.replace(" ", "").replace("+", "");

        Intent sendIntent = new Intent("android.intent.action.MAIN");
        sendIntent.setComponent(new ComponentName("com.whatsapp","com.whatsapp.Conversation"));
        sendIntent.putExtra("jid", PhoneNumberUtils.stripSeparators(number)+"@s.whatsapp.net");
       // getApplication().startActivity(sendIntent);

        startActivity(Intent.createChooser(sendIntent, "Compartir en")
                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));

    } catch(Exception e) {
        Log.e("WS", "ERROR_OPEN_MESSANGER"+e.toString());
    }
}

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要处理业务whatsapp和普通whatsapp，需要使用url方案意图，因为使用包“com.whatsapp”的常规方法仅适用于普通whatsapp

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下面是处理普通和业务whatsapp的代码示例：

try {
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setData(Uri.parse("whatsapp://send?text=The text message goes here");
        context.startActivity(i);
    } catch (Exception e){
        Toast.makeText(context, "Whatsapp not installed!", Toast.LENGTH_LONG).show();
    }

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如果安装了两个whatsapp，并且只安装了其中一个，则会打开一个选择器，该特定版本将被启动。

在Kotlin中，您将这样做

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打开特定用户WhatsApp号码并发送键入的消息

startActivity(
        Intent(
            Intent.ACTION_VIEW,
            Uri.parse(
                "https://api.whatsapp.com/send?phone=Phone Number&text=Message to send"
            )
        )
    )

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是的，我现在将尝试@Ali Gürelli它说它无法解析符号活动它现在有一个错误，它无法解析方法getActivity（），是的，我知道这是我首先写的，但它对我不起作用。我想说的是，我需要以+00 0000000000的格式发送号码，如果设备上没有安装WhatsApp，它将打开一个web浏览器来处理这个问题。美好的我已在手机浏览器中使用我的号码打开此URL。我现在有自己的聊天室，这会让非IT人员去哇，这更好，因为不需要在应用程序上安装Whatsapp来添加

消息

，您必须使用

”https://api.whatsapp.com/send?phone=$phoneNumber“+”&text=“+urlcoder.encode（消息，“UTF-8”）

您将消息放在了什么地方？？？jid的用途是什么？

 private void openWhatsApp(String number) {
    try {
        number = number.replace(" ", "").replace("+", "");

        Intent sendIntent = new Intent("android.intent.action.MAIN");
        sendIntent.setComponent(new ComponentName("com.whatsapp","com.whatsapp.Conversation"));
        sendIntent.putExtra("jid", PhoneNumberUtils.stripSeparators(number)+"@s.whatsapp.net");
       // getApplication().startActivity(sendIntent);

        startActivity(Intent.createChooser(sendIntent, "Compartir en")
                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));

    } catch(Exception e) {
        Log.e("WS", "ERROR_OPEN_MESSANGER"+e.toString());
    }
}

try {
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setData(Uri.parse("whatsapp://send?text=The text message goes here");
        context.startActivity(i);
    } catch (Exception e){
        Toast.makeText(context, "Whatsapp not installed!", Toast.LENGTH_LONG).show();
    }

startActivity(
        Intent(
            Intent.ACTION_VIEW,
            Uri.parse(
                "https://api.whatsapp.com/send?phone=Phone Number&text=Message to send"
            )
        )
    )