尝试了堆栈溢出的一切，现在我能够采取的msg frwd。但是，直到您实际单击“否”，才会发送msg。WhatsApp联系人列表请帮助被困在这里几天....事情是，我试图建立一个应用程序，在其中，当我给予一个数字，然后味精应该发送到它使用WhatsApp。使用此代码从Satheesh's answer here msg正在frwded，当我选择一个号码，它发送预定义的msg给它。但我希望该味精应直接发送没有什么应用程序等待用户点击一个数字。.

//checks if whats app is installed or not..        
         private boolean whatsappInstalledOrNot(String uri) {
                PackageManager pm = getPackageManager();
                boolean app_installed = false;
                try {
                    pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
                    app_installed = true;
                } catch (PackageManager.NameNotFoundException e) {
                    app_installed = false;
                }
                return app_installed;
            }

            //Main Process
              boolean isWhatsappInstalled = whatsappInstalledOrNot("com.whatsapp");
                    if (isWhatsappInstalled) {
                        String a="91*********0";// the nuber to which msg is to be sent
                        Uri uri = Uri.parse("smsto:" + a);
                        Intent sendIntent = new Intent(Intent.ACTION_SEND, uri);
                        sendIntent.putExtra(Intent.EXTRA_TEXT, "Test message"+a);//msg to be sent
                      //sendIntent.putExtra("sms_body", "ydyeryyerf");  
                        sendIntent.setType("text/plain");// type of msg->text
                        sendIntent.putExtra("chat",true);
                        sendIntent.setPackage("com.whatsapp");// picks whats app
                      //  startActivity(sendIntent);
                        startActivity(Intent.createChooser(sendIntent, a));//starts whats app                                                                       
                      } else {
                        // should redriect to play store to download whatsApp
                        Toast.makeText(getApplicationContext(), "WhatsApp not Installed",
                                Toast.LENGTH_SHORT).show();
                        Uri uri = Uri.parse("market://details?id=com.whatsapp");
                        Intent playStore = new Intent(Intent.ACTION_VIEW, uri);
                        startActivity(playStore);

                    }