Android时区听众/接收器 - 未达到主要活性

Question

目标：在类中具有Android Auto-Detect TigeZone（TZ）的变化，并使MainActivity接收新的TZ。

电流：清单是设置，类接收TZ（请参见下面的第2项，log.e在我通过电话更改TZ后显示新的TZ），但是MainAttivity/ontzchanged未接收新的TZ并且根本没有被调用。

问题：如何获得从课堂上接收新TZ的主要目的？

代码：

1-清单

<receiver
    android:name=".TZChangeReceiver"
    android:enabled="true">
    <intent-filter>
        <action android:name="android.intent.action.TIMEZONE_CHANGED" />
    </intent-filter>
</receiver>

2-班级

public class TZChangeReceiver extends BroadcastReceiver {
    public static TZChangeReceiverListener TZChangeReceiverListener;
    public TZChangeReceiver() {
        super();
    }
    @Override
    public void onReceive(Context context, Intent arg1) {
        String localTZ = TimeZone.getDefault().getID();
        Log.e (" tzchg ", " got it " + localTZ);
        if (TZChangeReceiverListener != null) {
            TZChangeReceiverListener.onTZChanged(localTZ);
        }
    }
    public static String isConnected() {
        String tzToken= TimeZone.getDefault().getID();
        return tzToken ;
    }
    public interface TZChangeReceiverListener {
        void onTZChanged (String isConnected);
    }
}

3-主进

public class MainActivity extends AppCompatActivity implements  TZChangeReceiver.TZChangeReceiverListener {
...other code...
    @Override
    public void onTZChanged(String isConnected) {
        isConnected = TZChangeReceiver.isConnected();
        Log.e(" TZ", " isConnected " + isConnected);
    }

Answer 1

我修复了它。我错过了以下内容

MyApplication.getInstance().setTZChangeListener(this);

这是在myapplication中：

public void setTZChangeListener(TZChangeReceiver.TZChangeReceiverListener listener) {
//Log.e(geotime + " MyApp: ","SetConnListener");
TZChangeReceiver.TZChangeReceiverListener = listener;