MainActivity.java 文件源码

public void WhatsApp(View view, String TextToUse) {

        PackageManager pm=getPackageManager();
        try {

            Intent waIntent = new Intent(Intent.ACTION_SEND);
            waIntent.setType("text/plain");

            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, TextToUse);
            startActivity(Intent.createChooser(waIntent, "Share with"));

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

    }