CallOutActivity.java

package org.commcare.dalvik.activities;

import java.util.Date;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

/**
 * @author ctsims
 *
 */
public class CallOutActivity extends Activity {

    public static final String PHONE_NUMBER = "cos_pn";
    public static final String CALL_DURATION = "cos_pd";
    public static final String RETURNING = "cos_return";
    public static final String INCOMING_ACTION = "cos_inac";
    
    private static final int DIALOG_NUMBER_ACTION = 0;
    
    private static final int SMS_RESULT = 0;
    
    private static String number;

    
    TelephonyManager tManager;
    CallListener listener;
    
    /*
     * (non-Javadoc)
     * @see android.app.Activity#onCreate(android.os.Bundle)
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        tManager = (TelephonyManager) this.getSystemService(TELEPHONY_SERVICE);
        listener = new CallListener(); 
                
        number = this.getIntent().getStringExtra(PHONE_NUMBER);
        
        if(this.getIntent().hasExtra(INCOMING_ACTION)) {
            dispatchAction(this.getIntent().getStringExtra(INCOMING_ACTION));
        } else {
            this.showDialog(DIALOG_NUMBER_ACTION);
        }
    }
    
    public void onResume() {
        super.onResume();
        if(listener.isFinished()) {
            long duration = listener.getCallDuration();
            if(duration > 0) {
                Intent i = new Intent(getIntent());
                i.putExtra(CALL_DURATION, duration);
                
                setResult(RESULT_OK, i);
                finish();
                return;
            } else {
                //TODO: We could also pop up a thing here that said "Phone call in progress"
                //or something
                Intent i = new Intent(getIntent());
                
                setResult(RESULT_CANCELED, i);
                finish();
                return;
            }
        } 
    }
    
    
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DIALOG_NUMBER_ACTION:
            final CharSequence[] items = {"Call", "Send SMS"};

            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("Select Action");
            builder.setItems(items, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int item) {
                    dispatchAction(item == 0 ? Intent.ACTION_CALL : Intent.ACTION_SENDTO);
                }
            });
            builder.setOnCancelListener(new OnCancelListener() {

                public void onCancel(DialogInterface dialog) {
                    Intent i = new Intent(getIntent());
                    
                    setResult(RESULT_CANCELED, i);
                    finish();
                    return;
                }
                
            });
            AlertDialog alert = builder.create();
            return alert;
        }
        return null;
    }
    
    private void dispatchAction(String action) {
        if(Intent.ACTION_CALL.equals(action) ) {
            tManager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
            
            Intent call = new Intent(Intent.ACTION_CALL);
            call.setData(Uri.parse("tel:" + number));
            startActivity(call);
        } else {                    
            Intent sms = new Intent(Intent.ACTION_SENDTO);
            sms.setData(Uri.parse("smsto:" + number));
            startActivityForResult(sms,SMS_RESULT);
        }
    }
    
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        if(requestCode == SMS_RESULT) {
            //we're done here
            Intent i = new Intent(getIntent());
            
            setResult(RESULT_CANCELED, i);
            finish();
        }
    }

    public class CallListener extends PhoneStateListener {
        boolean called = false;
        long started;
        long duration;
        boolean finished = false;

        /*
         * (non-Javadoc)
         * @see android.telephony.PhoneStateListener#onCallStateChanged(int, java.lang.String)
         */
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            super.onCallStateChanged(state, incomingNumber);

            // Don't fire before the call was made
            if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
                called = true;
                started = new Date().getTime();
            }

            // Call has ended -- now bring the activity back to front
            if (called && state == TelephonyManager.CALL_STATE_IDLE) {
                called = false;
                tManager.listen(this, PhoneStateListener.LISTEN_NONE);
                
                duration = new Date().getTime() - started;
                finished = true;
                
                //TODO: Any way to skip the stupid Call Log?
                
                if(duration > 0) {
                    Intent i = new Intent(getIntent());
                    i.putExtra(CALL_DURATION, duration);
                     
                    setResult(RESULT_OK, i);
                    finish();
                    return;
                } else {
                    Intent i = new Intent(getIntent());
                    setResult(RESULT_CANCELED, i);
                    finish();
                    return;
                }
                
            }
        }
        
        public long getCallDuration() {
            return duration;
        }
        
        public boolean isFinished() {
            return finished;
        }
    }
}