【Android 开发教程】获取发送短信后的反馈

本章节翻译自《Beginning-Android-4-Application-Development》，如有翻译不当的地方，敬请指出。
原书购买地址http://www.amazon.com/Beginning-Android-4-Application-Development/dp/1118199545/

上一节介绍了如何发送短信，但是如何知道短信被成功地发送了？这就需要创建两个PendingIntent对象去监视整个发送过程的状态。这两个PendingIntent对象作为参数传递给sendTextMessage()方法。

public class SMSActivity extends Activity {
	String SENT = "SMS_SENT";
	String DELIVERED = "SMS_DELIVERED";
	PendingIntent sentPI, deliveredPI;
	BroadcastReceiver smsSentReceiver, smsDeliveredReceiver;
    IntentFilter intentFilter;
    
    private BroadcastReceiver intentReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            //?display the SMS received in the TextView?
            TextView SMSes = (TextView) findViewById(R.id.textView1);
            SMSes.setText(intent.getExtras().getString("sms"));
        }
    };
	
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		sentPI = PendingIntent.getBroadcast(this, 0,
				new Intent(SENT), 0);

		deliveredPI = PendingIntent.getBroadcast(this, 0,
				new Intent(DELIVERED), 0);
	}

	@Override
	public void onResume() {
		super.onResume();
		//---create the BroadcastReceiver when the SMS is sent---
		smsSentReceiver = new BroadcastReceiver(){
			@Override
			public void onReceive(Context arg0, Intent arg1) {
				switch (getResultCode())
				{
				case Activity.RESULT_OK:
					Toast.makeText(getBaseContext(), "SMS sent",
							Toast.LENGTH_SHORT).show();
					break;
				case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
					Toast.makeText(getBaseContext(), "Generic failure",
							Toast.LENGTH_SHORT).show();
					break;
				case SmsManager.RESULT_ERROR_NO_SERVICE:
					Toast.makeText(getBaseContext(), "No service",
							Toast.LENGTH_SHORT).show();
					break;
				case SmsManager.RESULT_ERROR_NULL_PDU:
					Toast.makeText(getBaseContext(), "Null PDU",
							Toast.LENGTH_SHORT).show();
					break;
				case SmsManager.RESULT_ERROR_RADIO_OFF:
					Toast.makeText(getBaseContext(), "Radio off",
							Toast.LENGTH_SHORT).show();
					break;
				}
			}
		};

		//---create the BroadcastReceiver when the SMS is delivered---
		smsDeliveredReceiver = new BroadcastReceiver(){
			@Override
			public void onReceive(Context arg0, Intent arg1) {
				switch (getResultCode())
				{
				case Activity.RESULT_OK:
					Toast.makeText(getBaseContext(), "SMS delivered",
							Toast.LENGTH_SHORT).show();
					break;
				case Activity.RESULT_CANCELED:
					Toast.makeText(getBaseContext(), "SMS not delivered",
							Toast.LENGTH_SHORT).show();
					break;
				}
			}
		}; 

		//---register the two BroadcastReceivers---
		registerReceiver(smsDeliveredReceiver, new IntentFilter(DELIVERED));      
		registerReceiver(smsSentReceiver, new IntentFilter(SENT));
	}

	@Override
	public void onPause() {
		super.onPause();

		//---unregister the two BroadcastReceivers---
		unregisterReceiver(smsSentReceiver);
		unregisterReceiver(smsDeliveredReceiver);    	
	}

	public void onClick(View v) {
		sendSMS("130xxxxxxxx", "Hello my friends!");
	}
	

	//?sends an SMS message to another device?
	private void sendSMS(String phoneNumber, String message)
	{
		SmsManager sms = SmsManager.getDefault();
		sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);
	}
}

首先，在onCreate里面初始化两个PendingIntent对象：

sentPI = PendingIntent.getBroadcast(this, 0,
				new Intent(SENT), 0);

		deliveredPI = PendingIntent.getBroadcast(this, 0,
				new Intent(DELIVERED), 0);

然后，在onResume里面注册相应的广播***：

registerReceiver(smsDeliveredReceiver, new IntentFilter(DELIVERED));      
		registerReceiver(smsSentReceiver, new IntentFilter(SENT));

接下来，传递两个PendingIntent实例：

SmsManager sms = SmsManager.getDefault();
		sms.sendTextMessage(phoneNumber, null, message, sentPI, deliveredPI);

最后，在onPause里面卸载相应的广播***：

unregisterReceiver(smsSentReceiver);
		unregisterReceiver(smsDeliveredReceiver);