我在MainActivity中有两个文件MainActivity.java和HomeFragment.java从HomeFragment调用一个函数,该函数要求用户打开手机上的位置服务。问题是即使用户已经打开了位置功能,仍然会调用该功能。有没有办法,只有当位置功能关闭时,HomeFragment的功能才会启动。
HomeFragment.java
public static void displayPromptForEnablingGPS(
final Activity activity)
{
final AlertDialog.Builder builder =
new AlertDialog.Builder(activity);
final String action = Settings.ACTION_LOCATION_SOURCE_SETTINGS;
final String message = "Enable either GPS or any other location"
+ " service to find current location. Click OK to go to"
+ " location services settings to let you do so.";
builder.setMessage(message)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface d, int id) {
activity.startActivity(new Intent(action));
d.dismiss();
}
});
builder.create().show();
}
MainActivity.java
public void showMainView() {
HomeFragment.displayPromptForEnablingGPS(this);
}
谢谢:)
答案 0 :(得分:23)
您可以使用以下内容:
final LocationManager manager = (LocationManager) getSystemService( Context.LOCATION_SERVICE );
if ( !manager.isProviderEnabled( LocationManager.GPS_PROVIDER ) ) {
// Call your Alert message
}
这应该可以解决问题。
要检查是否已启用位置服务,您可以使用与此类似的代码:
String locationProviders = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if (locationProviders == null || locationProviders.equals("")) {
...
startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}
来源: 马库斯'找到帖子here