我想知道如何向特定的WhatsApp联系人发送文本。我找到了一些代码来查看特定的联系人，但没有发送数据的代码。
Cursor c = getContentResolver().query(ContactsContract.Data.CONTENT_URI,
new String[] { ContactsContract.Contacts.Data._ID }, ContactsContract.Data.DATA1 + "=?",
new String[] { id }, null);
c.moveToFirst();
Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse("content://com.android.contacts/data/" + c.getString(0)));
startActivity(i);
c.close();
这对于查看WhatsApp联系人很好用，但现在我如何添加一些文本呢？或者Whatsapp开发人员没有实现这种API吗？
我已经找到了正确的方法：
源代码：phone和message都是String类型。
PackageManager packageManager = context.getPackageManager();
Intent i = new Intent(Intent.ACTION_VIEW);
try {
String url = "https://api.whatsapp.com/send?phone="+ phone +"&text=" + URLEncoder.encode(message, "UTF-8");
i.setPackage("com.whatsapp");
i.setData(Uri.parse(url));
if (i.resolveActivity(packageManager) != null) {
context.startActivity(i);
}
} catch (Exception e){
e.printStackTrace();
}
尽情享受！
我认为答案是你的问题和这个答案的结合: https://dev59.com/6WUp5IYBdhLWcg3wLVKn#15931345 因此，我建议尝试以下代码：
Intent i = new Intent(Intent.ACTION_SENDTO, Uri.parse("content://com.android.contacts/data/" + c.getString(0)));
i.setType("text/plain");
i.setPackage("com.whatsapp"); // so that only Whatsapp reacts and not the chooser
i.putExtra(Intent.EXTRA_SUBJECT, "Subject");
i.putExtra(Intent.EXTRA_TEXT, "I'm the body.");
startActivity(i);
我查看了Whatsapp清单并发现ACTION_SEND已经注册到活动，所以那不会对你有帮助。然而，ACTION_SENDTO已经注册到活动，似乎更适合你的问题。
Whatsapp可以作为发送短信的替代品，因此它应该像短信一样工作。当你没有指定期望的应用程序（通过）时，Android将显示应用程序选择器。因此，你只需要查看通过意图发送短信的代码，然后提供额外的包信息即可。
Uri uri = Uri.parse("smsto:" + smsNumber);
Intent i = new Intent(Intent.ACTION_SENDTO, uri);
i.putExtra("sms_body", smsText);
i.setPackage("com.whatsapp");
startActivity(i);
首先尝试将意图 ACTION_SEND 替换为 ACTION_SENDTO。如果这不起作用，则提供额外的 sms_body。如果这还是不起作用，请尝试更改 URI。
更新 我尝试自己解决这个问题，但无法找到解决方案。WhatsApp 打开了聊天记录，但没有将文本发送出去。似乎这个功能还没有实现。
我做到了！
private void openWhatsApp() {
String smsNumber = "7****"; // E164 format without '+' sign
Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.setType("text/plain");
sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
sendIntent.putExtra("jid", smsNumber + "@s.whatsapp.net"); //phone number without "+" prefix
sendIntent.setPackage("com.whatsapp");
if (intent.resolveActivity(getActivity().getPackageManager()) == null) {
Toast.makeText(this, "Error/n" + e.toString(), Toast.LENGTH_SHORT).show();
return;
}
startActivity(sendIntent);
}
这种方法同样适用于 WhatsApp Business 应用程序！
更改包名称为 sendIntent.setPackage("com.whatsapp.w4b"); 以适用于 WhatsApp Business。
伟大的技巧，Rishabh，非常感谢，我一直在寻找这个解决方案已经三年了。
根据上面 Rishabh Maurya 的答案，我已经实现了这段代码，它可以很好地用于在 WhatsApp 上分享文本和图片。
请注意，在这两种情况下它都会打开一个 WhatsApp 对话（如果 toNumber 存在于用户的 WhatsApp 联系人列表中），但是用户必须点击发送按钮才能完成操作。也就是说，它有助于跳过联系人选择步骤。
对于文本消息
String toNumber = "+91 98765 43210"; // contains spaces.
toNumber = toNumber.replace("+", "").replace(" ", "");
Intent sendIntent = new Intent("android.intent.action.MAIN");
sendIntent.putExtra("jid", toNumber + "@s.whatsapp.net");
sendIntent.putExtra(Intent.EXTRA_TEXT, message);
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.setPackage("com.whatsapp");
sendIntent.setType("text/plain");
startActivity(sendIntent);
分享图片
String toNumber = "+91 98765 43210"; // contains spaces.
toNumber = toNumber.replace("+", "").replace(" ", "");
Intent sendIntent = new Intent("android.intent.action.MAIN");
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(imageFile));
sendIntent.putExtra("jid", toNumber + "@s.whatsapp.net");
sendIntent.putExtra(Intent.EXTRA_TEXT, message);
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.setPackage("com.whatsapp");
sendIntent.setType("image/png");
context.startActivity(sendIntent);
享受使用WhatsApp！
它可以让您打开WhatsApp与特定用户的对话屏幕：
private void openWhatsApp() {
String smsNumber = "91XXXXXXXX20";
boolean isWhatsappInstalled = whatsappInstalledOrNot("com.whatsapp");
if (isWhatsappInstalled) {
Intent sendIntent = new Intent("android.intent.action.MAIN");
sendIntent.setComponent(new ComponentName("com.whatsapp", "com.whatsapp.Conversation"));
sendIntent.putExtra("jid", PhoneNumberUtils.stripSeparators(smsNumber) + "@s.whatsapp.net");//phone number without "+" prefix
startActivity(sendIntent);
} else {
Uri uri = Uri.parse("market://details?id=com.whatsapp");
Intent goToMarket = new Intent(Intent.ACTION_VIEW, uri);
Toast.makeText(this, "WhatsApp not Installed",
Toast.LENGTH_SHORT).show();
startActivity(goToMarket);
}
}
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;
}
看看我的回答：https://dev59.com/xpXfa4cB1Zd3GeqPhqCk#40285262
Intent sendIntent = new Intent("android.intent.action.MAIN");
sendIntent.setComponent(new ComponentName("com.whatsapp","com.whatsapp.Conversation"));
sendIntent.putExtra("jid", PhoneNumberUtils.stripSeparators("YOUR_PHONE_NUMBER")+"@s.whatsapp.net");//phone number without "+" prefix
startActivity(sendIntent);
更新：
之前提到的黑客攻击不能用于添加任何特定的信息，因此这里有一种新的方法。将用户的手机号码以国际格式传递到此处，不要包含任何括号、破折号或加号。例如：如果用户来自印度，他的手机号码是94xxxxxxxx，那么国际格式将为9194xxxxxxxx。不要忘记在手机号码前面作为前缀添加国家代码。
private fun sendMsg(mobile: String, msg: String){
try {
val packageManager = requireContext().packageManager
val i = Intent(Intent.ACTION_VIEW)
val url =
"https://wa.me/$mobile" + "?text=" + URLEncoder.encode(msg, "utf-8")
i.setPackage("com.whatsapp")
i.data = Uri.parse(url)
if (i.resolveActivity(packageManager) != null) {
requireContext().startActivity(i)
}
} catch (e: Exception) {
e.printStackTrace()
}
}
注意：此方法仅适用于用户在其Whatsapp帐户中添加的联系人。
Whatsapp 有自己的 API
Intent sendIntent = new Intent("android.intent.action.MAIN");
sendIntent.setAction(Intent.ACTION_VIEW);
sendIntent.setPackage("com.whatsapp");
String url = "https://api.whatsapp.com/send?phone=" + "Phone with international format" + "&text=" + "your message";
sendIntent.setData(Uri.parse(url));
if(sendIntent.resolveActivity(context.getPackageManager()) != null){
startActivity(sendIntent);
}
为了检查该活动是否可用，已添加更新代码检查。
请参见此文档
这将首先搜索指定的联系人，然后打开一个聊天窗口。如果未安装WhatsApp，则使用try-catch块处理此问题。
String digits = "\\d+";
String mob_num = "987654321";
if (mob_num.matches(digits))
{
try {
//linking for whatsapp
Uri uri = Uri.parse("whatsapp://send?phone=+91" + mob_num);
Intent i = new Intent(Intent.ACTION_VIEW, uri);
startActivity(i);
}
catch (ActivityNotFoundException e){
e.printStackTrace();
//if you're in anonymous class pass context like "YourActivity.this"
Toast.makeText(this, "WhatsApp not installed.", Toast.LENGTH_SHORT).show();
}
}
我正在尝试使用另一个应用程序在WhatsApp中发送文本消息。
假设我们有一个按钮，当点击该按钮时，会调用以下方法：
sendTextMsgOnWhatsApp("+91 9876543210", "你好，这是我的测试消息");
public void sendTextMsgOnWhatsApp(String sContactNo, String sMessage) {
String toNumber = sContactNo; // contains spaces, i.e., example +91 98765 43210
toNumber = toNumber.replace("+", "").replace(" ", "");
/*this method contactIdByPhoneNumber() will get unique id for given contact,
if this return's null then it means that you don't have any contact save with this mobile no.*/
String sContactId = contactIdByPhoneNumber(toNumber);
if (sContactId != null && sContactId.length() > 0) {
/*
* Once We get the contact id, we check whether contact has a registered with WhatsApp or not.
* this hasWhatsApp(hasWhatsApp) method will return null,
* if contact doesn't associate with whatsApp services.
* */
String sWhatsAppNo = hasWhatsApp(sContactId);
if (sWhatsAppNo != null && sWhatsAppNo.length() > 0) {
Intent sendIntent = new Intent("android.intent.action.MAIN");
sendIntent.putExtra("jid", toNumber + "@s.whatsapp.net");
sendIntent.putExtra(Intent.EXTRA_TEXT, sMessage);
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.setPackage("com.whatsapp");
sendIntent.setType("text/plain");
startActivity(sendIntent);
} else {
// this contact does not exist in any WhatsApp application
Toast.makeText(this, "Contact not found in WhatsApp !!", Toast.LENGTH_SHORT).show();
}
} else {
// this contact does not exist in your contact
Toast.makeText(this, "create contact for " + toNumber, Toast.LENGTH_SHORT).show();
}
}
private String contactIdByPhoneNumber(String phoneNumber) {
String contactId = null;
if (phoneNumber != null && phoneNumber.length() > 0) {
ContentResolver contentResolver = getContentResolver();
Uri uri = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phoneNumber));
String[] projection = new String[]{ContactsContract.PhoneLookup._ID};
Cursor cursor = contentResolver.query(uri, projection, null, null, null);
if (cursor != null) {
while (cursor.moveToNext()) {
contactId = cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.PhoneLookup._ID));
}
cursor.close();
}
}
return contactId;
}
public String hasWhatsApp(String contactID) {
String rowContactId = null;
boolean hasWhatsApp;
String[] projection = new String[]{ContactsContract.RawContacts._ID};
String selection = ContactsContract.RawContacts.CONTACT_ID + " = ? AND " + ContactsContract.RawContacts.ACCOUNT_TYPE + " = ?";
String[] selectionArgs = new String[]{contactID, "com.whatsapp"};
Cursor cursor = getContentResolver().query(ContactsContract.RawContacts.CONTENT_URI, projection, selection, selectionArgs, null);
if (cursor != null) {
hasWhatsApp = cursor.moveToNext();
if (hasWhatsApp) {
rowContactId = cursor.getString(0);
}
cursor.close();
}
return rowContactId;
}
请将以下权限添加到 AndroidManifest.xml 文件中
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.INTERNET" />
这是最短的方式。
String mPhoneNumber = "+972505555555";
mPhoneNumber = mPhoneNumber.replaceAll("+", "").replaceAll(" ", "").replaceAll("-","");
String mMessage = "Hello world";
String mSendToWhatsApp = "https://wa.me/" + mPhoneNumber + "?text="+mMessage;
startActivity(new Intent(Intent.ACTION_VIEW,
Uri.parse(
mSendToWhatsApp
)));