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我有從服務器獲取json的類「MyGcmListenerService」。我想從JSON中獲取字符串並將其發送到MainActivity並激活一個方法。 我被告知我可以使用Listener和界面。以及我真的不知道如何使用它。誰能幫幫我嗎？Android - 如何使用LISENTER在類之間傳輸數據
這是MyGcmListenerService代碼
package com.world.bolandian.watchmesensor;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import com.google.android.gms.gcm.GcmListenerService;
public class MyGcmListenerService extends GcmListenerService {
private static final String TAG = "MyGcmListenerService";
/**
* Called when message is received.
*
* @param from SenderID of the sender.
* @param data Data bundle containing message data as key/value pairs.
* For Set of keys use data.keySet().
*/
// [START receive_message]
@Override
public void onMessageReceived(String from, Bundle data) {
String message = data.getString("typemessage");
Log.d(TAG, "From: " + from);
Log.d(TAG, "Message: " + message);
if (from.startsWith("/topics/")) {
// message received from some topic.
} else {
// normal downstream message.
}
// [START_EXCLUDE]
/**
* Production applications would usually process the message here.
* Eg: - Syncing with server.
* - Store message in local database.
* - Update UI.
*/
/**
* In some cases it may be useful to show a notification indicating to the user
* that a message was received.
*/
sendNotification(message);
// [END_EXCLUDE]
}
// [END receive_message]
/**
* Create and show a simple notification containing the received GCM message.
*
* @param message GCM message received.
*/
private void sendNotification(String message) {
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.common_google_signin_btn_icon_dark)
.setContentTitle("GCM Message")
.setContentText(message)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
}
}
這是在MainActivity
package com.world.bolandian.watchmesensor;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;
import com.google.gson.Gson;
public class MainActivity extends Activity implements SensorEventListener, Listen{
Sensor accelerometer;
SensorManager sm;
TextView acceleration;
SendValues sv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sm = (SensorManager)getSystemService(SENSOR_SERVICE);
accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sm.registerListener(this,accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
acceleration = (TextView)findViewById(R.id.sensorTxt);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onSensorChanged(SensorEvent event) {
acceleration.setText("X: " + event.values[0] +
"\nY: " + event.values[1] +
"\nZ: " + event.values[2]);
// get the phone number from the login
SharedPreferences sh = getSharedPreferences("BikePhone", Context.MODE_PRIVATE);
String phone = sh.getString(Params.PHONE,null);
if (event.values[0] >=5.000 || (event.values[0] <= -5.000) || (event.values[1] >= 5.000) || (event.values[1] <= -5.000))
{
sv = new SendValues(phone,"1");
Gson g = new Gson();
String ans = g.toJson(sv,SendValues.class);
send(sv);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void send (SendValues sv)
{
SendThreadCommunication con;
ServerRequest ser = new ServerRequest();
ser.setResponse(this);
Gson gson = new Gson();
String send = gson.toJson(sv,SendValues.class);
ser.addParamaters(Params.VALUES, send);
ser.addServerName(Params.SERVER_URL);
ser.addServletName(Params.BIKE_TO_USER);
con = new SendThreadCommunication(ser);
con.start();
}
@Override
public void good() {
}
@Override
public void notGood() {
}
@Override
public void userGcmNotRegistered() {
Toast.makeText(getApplication(), "There is some problem, please register again to the App", Toast.LENGTH_LONG).show();
}
}
這是接口
package com.world.bolandian.watchmesensor;
public interface Listen {
public void good();
public void notGood();
}