我的应用程序中有一个服务在后端运行,当我按下按钮音量时服务可以启动,当按下按钮音量时停止服务.
public class SettingsContentObserver extends ContentObserver {
int previousVolume;
Context context;
public SettingsContentObserver(Context c, Handler handler) {
super(handler);
context=c;
AudioManager audio = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
previousVolume = audio.getStreamVolume(AudioManager.STREAM_RING);
}
@Override
public boolean deliverSelfNotifications() {
return super.deliverSelfNotifications();
}
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
AudioManager audio = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
int currentVolume = audio.getStreamVolume(AudioManager.STREAM_RING);
int delta=previousVolume-currentVolume;
if(delta > 0)
{
System.out.println("Decreased") ;
Intent intent = new Intent(context, MyAlarmService.class);
context.stopService(intent);
previousVolume=currentVolume;
}
else if(delta < 0)
{
System.out.println("Increased");
Intent intent = new Intent(context, …我有一项从其他应用程序获取数据的服务。
当我得到日期时，我发送消息broadCast以刷新用户界面。
该onReceive方法被多次调用，数据被多次显示。
这是我的代码：
数据服务.java
if(sizeLat == 1) {
sendMessage("Alerte1;");
}
else {
sendMessage("Alerte2;");
}
private void sendMessage(String message) {
Log.w("","==> send message");
Intent intent = new Intent("my-event");
// add data
intent.putExtra("message", message);
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}
MainActivity.java
// handler for received Intents for the "my-event" event
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Log.e("","Onreceiver");
String message = intent.getStringExtra("message");
if(message.equals("Alerte1")){
parentItems.add(message);
adapter.notifyDataSetChanged();
}}};
@Override
protected void onResume() {
Log.d(TAG, "On …