Android 将字符串从服务发送到活动
我正试图通过广播将字符串从服务发送到我的主要活动。 我在一些论坛上读到有两种使用广播的方式。一种方法是在清单中注册活动,第二种方法是在本地活动上注册。 我想知道如何使用第二种方法。我已经试过了,但不幸的是我没有成功 请告诉我我做错了什么 服务代码Android 将字符串从服务发送到活动,android,android-intent,broadcastreceiver,Android,Android Intent,Broadcastreceiver,我正试图通过广播将字符串从服务发送到我的主要活动。 我在一些论坛上读到有两种使用广播的方式。一种方法是在清单中注册活动,第二种方法是在本地活动上注册。 我想知道如何使用第二种方法。我已经试过了,但不幸的是我没有成功 请告诉我我做错了什么 服务代码 public class MyGcmListenerService extends GcmListenerService { private static final String TAG = "MyGcmListenerService";
public class MyGcmListenerService extends GcmListenerService {
private static final String TAG = "MyGcmListenerService";
// [START receive_message]
@Override
public void onMessageReceived(String from, Bundle data) {
String typemessage = data.getString("typemessage"); // typeMessage = 0 or 1 = lock or unlock
String datamessage = data.getString("datamessage"); // dataMessage = time and message that says lock or unlock
Log.d(TAG, "TypeMessage: " + typemessage);
Log.d(TAG,"DataMesaage:"+ datamessage);
Intent in = new Intent();
in.putExtra("TYPE",typemessage);
in.setAction("NOW");
sendBroadcast(in);
...
public class MainActivity extends Activity implements SensorEventListener, Listen {
private BroadcastReceiver statusReceiver;
private IntentFilter mIntent;
Sensor accelerometer;
SensorManager sm;
TextView acceleration;
SendValues sv;
int counter3 = 0;
int counter5 = 0;
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mIntent = new IntentFilter("NOW");
// this.registerReceiver(,new IntentFilter("status"));
sm = (SensorManager) getSystemService(SENSOR_SERVICE);
sm.registerListener(this,accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
acceleration = (TextView) findViewById(R.id.sensorTxt);
statusReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String type = intent.getStringExtra("message"); //get the type of message from MyGcmListenerService 1 - lock or 0 -Unlock
sm = (SensorManager) getSystemService(SENSOR_SERVICE);
accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
Log.d(TAG, "Status: " + type);
if (type == "1") // 1 == lock
{
Toast.makeText(getApplication(), "Lock", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplication(), "UNLOCK", Toast.LENGTH_LONG).show();
}
}
};
}
@Override
protected void onResume()
{
super.onResume();
registerReceiver(statusReceiver,mIntent);
}
@Override
protected void onPause() {
if(mIntent != null) {
unregisterReceiver(statusReceiver);
mIntent = null;
}
super.onPause();
}
----------
主要活动代码
public class MyGcmListenerService extends GcmListenerService {
private static final String TAG = "MyGcmListenerService";
// [START receive_message]
@Override
public void onMessageReceived(String from, Bundle data) {
String typemessage = data.getString("typemessage"); // typeMessage = 0 or 1 = lock or unlock
String datamessage = data.getString("datamessage"); // dataMessage = time and message that says lock or unlock
Log.d(TAG, "TypeMessage: " + typemessage);
Log.d(TAG,"DataMesaage:"+ datamessage);
Intent in = new Intent();
in.putExtra("TYPE",typemessage);
in.setAction("NOW");
sendBroadcast(in);
...
public class MainActivity extends Activity implements SensorEventListener, Listen {
private BroadcastReceiver statusReceiver;
private IntentFilter mIntent;
Sensor accelerometer;
SensorManager sm;
TextView acceleration;
SendValues sv;
int counter3 = 0;
int counter5 = 0;
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mIntent = new IntentFilter("NOW");
// this.registerReceiver(,new IntentFilter("status"));
sm = (SensorManager) getSystemService(SENSOR_SERVICE);
sm.registerListener(this,accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
acceleration = (TextView) findViewById(R.id.sensorTxt);
statusReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String type = intent.getStringExtra("message"); //get the type of message from MyGcmListenerService 1 - lock or 0 -Unlock
sm = (SensorManager) getSystemService(SENSOR_SERVICE);
accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
Log.d(TAG, "Status: " + type);
if (type == "1") // 1 == lock
{
Toast.makeText(getApplication(), "Lock", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplication(), "UNLOCK", Toast.LENGTH_LONG).show();
}
}
};
}
@Override
protected void onResume()
{
super.onResume();
registerReceiver(statusReceiver,mIntent);
}
@Override
protected void onPause() {
if(mIntent != null) {
unregisterReceiver(statusReceiver);
mIntent = null;
}
super.onPause();
}
----------
我不知道我做错了什么,还有一个问题,我需要在
在set Action(“我可以在这里放置任何字符串/操作,我做了什么?它是什么意思?操作?我只想将字符串发送到主活动,我应该做什么操作?”)您可以做两件事:
1。您可以创建类并实现Parcelable。2.使用意向服务而不是服务。 请参阅以下链接:
LocalBroadcastManager是解决此类问题的最佳解决方案。我已将LocalBroadcastManager实现到您现有的。这很容易。希望它能起作用。您的代码将如下所示
private BroadcastReceiver statusReceiver;
private IntentFilter mIntent;
Sensor accelerometer;
SensorManager sm;
TextView acceleration;
SendValues sv;
int counter3 = 0;
int counter5 = 0;
private static final String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//mIntent = new IntentFilter("NOW");
// this.registerReceiver(,new IntentFilter("status"));
sm = (SensorManager) getSystemService(SENSOR_SERVICE);
sm.registerListener(this,accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
acceleration = (TextView) findViewById(R.id.sensorTxt);
}
private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String type = intent.getStringExtra("message"); //get the type of message from MyGcmListenerService 1 - lock or 0 -Unlock
sm = (SensorManager) getSystemService(SENSOR_SERVICE);
accelerometer = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
Log.d(TAG, "Status: " + type);
if (type == "1") // 1 == lock
{
Toast.makeText(getApplication(), "Lock", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplication(), "UNLOCK", Toast.LENGTH_LONG).show();
}
}
};
@Override
protected void onResume()
{
super.onResume();
//registerReceiver(statusReceiver,mIntent);
LocalBroadcastManager.getInstance(MainActivity.this).registerReceiver(broadcastReceiver, new IntentFilter("NOW"));
}
@Override
protected void onPause() {
if(mIntent != null) {
unregisterReceiver(statusReceiver);
mIntent = null;
}
super.onPause();
}
并通过推送通知传递值,如下所示
Intent in = new Intent();
in.putExtra("TYPE",typemessage);
in.setAction("NOW");
//sendBroadcast(in);
LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(in);
您可以使用
LocalBroadcastManager
实现您想要的功能。就像在服务中一样
在您想要发送数据时调用此方法
private static void sendMessageToActivity(String msg) {
Intent intent = new Intent("intentKey");
// You can also include some extra data.
intent.putExtra("key", msg);
LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
}
在你的活动中
在onCreate()中注册一个接收器
在onCreate()
这段代码中
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Get extra data included in the Intent
String message = intent.getStringExtra("key");
tvStatus.setText(message);
// Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
}
};
onReceive
方法是否被调用?该方法未被调用检查我如何使用意向服务?@BolandianEran:如果我的回答有助于您解决问题,请接受回答。谢谢我希望您现在就开始尝试您的代码,我不知道为什么,但是这行LocalBroadcastManager.getInstance(context.sendBroadcast(intent))中的“context”给了我错误;错误:无法在getInstance(this).sendBroadcast(intent)中解析符号“context”passthis
如果您遇到任何问题,请告诉我。@DevendraSingh如果使用此
方法,则无法使用。LocalBroadcastManager现在已被弃用。注销广播时出现错误,应使用:LocalBroadcastManager.getInstance(MainActivity.this)。unregisterReceiver(broadcastReceiver);