要获取手机通话的PreciseCallState，需要使用Telephony Manager和PhoneStateListener。首先，在AndroidManifest.xml文件中添加以下权限：

然后，在相应的Activity或Service中，创建Telephony Manager和PhoneStateListener对象并实现相应的回调函数：

TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

PhoneStateListener phoneStateListener = new PhoneStateListener() {
  @Override
  public void onCallStateChanged(int state, String incomingNumber) {
    super.onCallStateChanged(state, incomingNumber);

    if (state == TelephonyManager.CALL_STATE_IDLE) {
      // no call
    } else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
      // off hook
    } else if (state == TelephonyManager.CALL_STATE_RINGING) {
      // ringing
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
          PreciseCallState preciseCallState = telephonyManager.getPreciseCallState();
          // use preciseCallState object to get more information about the call state
      }
    }
  }
};

telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);

上述代码中，我们使用TelephonyManager.getPreciseCallState()方法获取PreciseCallState对象。请注意，此方法需要在Android Q或更高版本中才能使用。

完整示例代码如下：

public class MainActivity extends AppCompatActivity {

    TelephonyManager telephonyManager;
    PhoneStateListener phoneStateListener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

        phoneStateListener = new PhoneStateListener() {
            @Override
            public void onCallStateChanged(int state, String incomingNumber) {
                super.onCallStateChanged(state, incomingNumber);

                if (state == TelephonyManager.CALL_STATE_IDLE) {
                    Log.d("MainActivity", "no call");
                } else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
                    Log.d("MainActivity", "off hook");
                } else if (state == TelephonyManager.CALL_STATE_RINGING) {
                    Log.d("MainActivity", "ringing");
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                        PreciseCallState preciseCallState = telephonyManager.getPreciseCallState();
                        Log.d("MainActivity", "precise call state: " + preciseCallState);
                    }
                }
            }
        };

        telephonyManager