Sending message through WhatsApp

Question

Since I found some older posts, that tell that whatsapp doesn\'t support this, I was wondering if something had changed and if there is a way to open a whatsapp \'chat\' wit

Answer 1

This works to me:

public static void shareWhatsApp(Activity appActivity, String texto) {

    Intent sendIntent = new Intent(Intent.ACTION_SEND);     
    sendIntent.setType("text/plain");
    sendIntent.putExtra(android.content.Intent.EXTRA_TEXT, texto);

    PackageManager pm = appActivity.getApplicationContext().getPackageManager();
    final List matches = pm.queryIntentActivities(sendIntent, 0);
    boolean temWhatsApp = false;
    for (final ResolveInfo info : matches) {
      if (info.activityInfo.packageName.startsWith("com.whatsapp"))  {
          final ComponentName name = new ComponentName(info.activityInfo.applicationInfo.packageName, info.activityInfo.name);
          sendIntent.addCategory(Intent.CATEGORY_LAUNCHER);
          sendIntent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_NEW_TASK);
          sendIntent.setComponent(name);
          temWhatsApp = true;
          break;
      }
    }               

    if(temWhatsApp) {
        //abre whatsapp
        appActivity.startActivity(sendIntent);
    } else {
        //alerta - você deve ter o whatsapp instalado
        Toast.makeText(appActivity, appActivity.getString(R.string.share_whatsapp), Toast.LENGTH_SHORT).show();
    }
}