我尝试使用此代码通过Intent发送短信：
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("smsto:" + phoneNumber));
intent.putExtra("address",phoneNumber);
intent.putExtra("sms_body",messageBody);
intent.putExtra("exit_on_sent",true);
startActivityForResult(intent,CODE);
然后,我想知道SMS是否已发送,我使用此代码：
public void onActivityResult(int requestCode,int resultCode,Intent intent) {
switch (requestCode) {
case CODE:
if (resultCode == Activity.RESULT_OK)
{
//Then do...
}
elseif(resultCode == Activity.RESULT_CANCELED)
{
// Do...
}
break;
}
}
事情是结果始终为0(Activity.RESULT_CANCELED),即使已发送短信也是如此.如何知道短信是否已发送？我想使用手机的短信默认应用程序,而不是创建发送短信的界面.
解决方法
在以下示例中,我们使用ContentObserver来监视SMS提供程序的更新.此Observer在SMS Intent被触发之前创建并启动,并根据目标地址检查Provider更改.创建Observer的Activity必须实现SmsSendObserver.SmsSendListener接口才能接收回调.
Observer的构造函数包含一个超时参数(以毫秒为单位),如果在一段合理的时间后没有发送消息,则允许Observer正确注销.如果需要,可以将其设置为NO_TIMEOUT.但是,如上所述,该类用于“一次性”使用,并且它将取消注册自身并在回调时使成员无效.如果没有回调,stop()方法可用于清理.在任何一种情况下,实例都不再可用,并且对它的任何引用都应设置为null.
示例活动：
public class MainActivity extends Activity
implements SmsSendObserver.SmsSendListener {
...
private void sendMessage(String phoneNumber,String messageBody) {
// This example has a timeout set to 15 seconds
new SmsSendObserver(this,phoneNumber,15000).start();
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("smsto:" + phoneNumber));
intent.putExtra("address",phoneNumber);
intent.putExtra("sms_body",messageBody);
intent.putExtra("exit_on_sent",true);
startActivity(intent);
}
public void onSmsSendEvent(boolean sent) {
Toast.makeText(this,sent ? "Message was sent" : "Timed out",Toast.LENGTH_SHORT).show();
}
}
SmsSendObserver类：
public class SmsSendObserver extends ContentObserver {
public static final int NO_TIMEOUT = -1;
private static final Handler handler = new Handler();
private static final Uri uri = Uri.parse("content://sms/");
private static final String COLUMN_ADDRESS = "address";
private static final String COLUMN_TYPE = "type";
private static final String[] PROJECTION = { COLUMN_ADDRESS,COLUMN_TYPE };
private static final int MESSAGE_TYPE_SENT = 2;
private Context context = null;
private ContentResolver resolver = null;
private String phoneNumber = null;
private long timeout = NO_TIMEOUT;
private boolean wasSent = false;
private boolean timedOut = false;
public SmsSendObserver(Context context,String phoneNumber,long timeout) {
super(handler);
if (context instanceof SmsSendListener) {
this.context = context;
this.resolver = context.getContentResolver();
this.phoneNumber = phoneNumber;
this.timeout = timeout;
}
else {
throw new IllegalArgumentException(
"Context must implement SmsSendListener interface");
}
}
private Runnable runOut = new Runnable() {
@Override
public void run() {
if (!wasSent) {
timedOut = true;
callBack();
}
}
};
public void start() {
if (resolver != null) {
resolver.registerContentObserver(uri,true,this);
if (timeout > NO_TIMEOUT) {
handler.postDelayed(runOut,timeout);
}
}
else {
throw new IllegalStateException(
"Current SmsSendObserver instance is invalid");
}
}
public void stop() {
if (resolver != null) {
resolver.unregisterContentObserver(this);
resolver = null;
context = null;
}
}
private void callBack() {
((SmsSendListener) context).onSmsSendEvent(wasSent);
stop();
}
@Override
public void onChange(boolean selfChange) {
if (wasSent || timedOut)
return;
Cursor cursor = null;
try {
cursor = resolver.query(uri,PROJECTION,null,null);
if (cursor != null && cursor.moveToFirst()) {
final String address =
cursor.getString(cursor.getColumnIndex(COLUMN_ADDRESS));
final int type =
cursor.getInt(cursor.getColumnIndex(COLUMN_TYPE));
if (PhoneNumberUtils.compare(address,phoneNumber) &&
type == MESSAGE_TYPE_SENT) {
wasSent = true;
callBack();
}
}
}
finally {
if (cursor != null) {
cursor.close();
}
}
}
public interface SmsSendListener {
// Passes true if the message was sent
// Passes false if timed out
public void onSmsSendEvent(boolean sent);
}
}
