Android(安卓)使用Telephony API

Android 使用Telephony API
public class TelephonyDemo extends Activity {    TextView textOut;    TelephonyManager telephonyManager;    PhoneStateListener listener;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        // Get the UI        textOut = (TextView) findViewById(R.id.textOut);        // Get the telephony manager        telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);        // Create a new PhoneStateListener        listener = new PhoneStateListener() {            @Override            public void onCallStateChanged(int state, String incomingNumber) {                String stateString = "N/A";                switch (state) {                case TelephonyManager.CALL_STATE_IDLE:                    stateString = "Idle";                    break;                case TelephonyManager.CALL_STATE_OFFHOOK:                    stateString = "Off Hook";                    break;                case TelephonyManager.CALL_STATE_RINGING:                    stateString = "Ringing";                    break;                }                textOut.append(String.format("\nonCallStateChanged: %s",                        stateString));            }        };        // Register the listener wit the telephony manager        telephonyManager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);    }}
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