java - 如何发送 Whatsapp 消息到新号码

Question

我想通过单击按钮向来自 Android Activity (又从服务器获取)的号码发送 Whatsapp 消息。 我必须向其发送新联系人的号码不是我手机上现有的联系人。 我知道如何从我的应用程序打开 Whatsapp 应用程序。 以下代码涉及从适配器打开 Whatsapp:

Intent sendIntent = new Intent();
sendIntent.setPackage("com.whatsapp");
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
sendIntent.setType("text/plain");
startActivity(sendIntent);

此代码打开 Whatsapp，但我不知道如何向其传递我必须向其发送消息的号码

Answer 1

试试这个

public void onClickWhatsApp(View view) {

    PackageManager pm=getPackageManager();
    try {

        Intent waIntent = new Intent(Intent.ACTION_SEND);
        waIntent.setType("text/plain");
        String text = "YOUR TEXT HERE";

        PackageInfo info=pm.getPackageInfo("com.whatsapp",     PackageManager.GET_META_DATA);
        //Check if package exists or not. If not then code 
        //in catch block will be called
        waIntent.setPackage("com.whatsapp");

        waIntent.putExtra(Intent.EXTRA_TEXT, text);
        startActivity(Intent.createChooser(waIntent, "Share with"));

   } catch (NameNotFoundException e) {
        Toast.makeText(this, "WhatsApp not Installed", Toast.LENGTH_SHORT)
                .show();
   }  

}