問題描述

我正在嘗試使用 Android 的 LocationManager requestLocationUpdates.一切正常，直到我嘗試提取廣播接收器中的實際位置對象.我是否需要專門為我的自定義意圖定義附加"，以便 Android LocationManager 在我將它傳遞給 requestLocationUpdates 之前知道如何將其添加到意圖中，或者它是否會創(chuàng)建附加捆綁包，無論它何時通過觸發(fā)廣播接收者的意圖?

I am trying to use Android's LocationManager requestLocationUpdates. Everything is working until I try to extract the actual location object that in my broadcast receiver. Do I need to specifically define the "extras" to my custom intent so that the Android LocationManager before I pass it to requestLocationUpdates so it knows how to add it into the intent, or will it create the extras-bundle regardless when it passes the fired intent to the broadcast receiver?

我的代碼如下所示:

Intent intent = new Intent("com.myapp.swarm.LOCATION_READY");
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(),
    0, intent, 0);

//Register for broadcast intents
int minTime = 5000;
int minDistance = 0;
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, minTime,
    minDistance, pendingIntent);

我有一個廣播接收器，它在宣言中定義為:

I have a broadcast receiver that is defined in the manifesto as:

<receiver android:name=".LocationReceiver">
    <intent-filter>
        <action android:name="com.myapp.swarm.LOCATION_READY" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</receiver>

廣播接收器類為:

public class LocationReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
    //Do this when the system sends the intent
    Bundle b = intent.getExtras();
    Location loc = (Location)b.get("KEY_LOCATION_CHANGED");

    Toast.makeText(context, loc.toString(), Toast.LENGTH_SHORT).show(); 
    }
}

我的loc"對象即將為空.

My "loc" object is coming up null.

推薦答案

好的，我設(shè)法通過將廣播接收器代碼中的 KEY_LOCATION_CHANGED 更改為:

OK, I managed to fix it by changing the KEY_LOCATION_CHANGED in the broadcast receiver code to:

public class LocationReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
    //Do this when the system sends the intent
    Bundle b = intent.getExtras();
    Location loc = (Location)b.get(android.location.LocationManager.KEY_LOCATION_CHANGED);

    Toast.makeText(context, loc.toString(), Toast.LENGTH_SHORT).show(); 
    }
}

這篇關(guān)于Android:使用 LocationManager.requestLocationUpdates() 時如何從 Intent 捆綁包中獲取位置信息的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！