我有一个主要活动,它有一个片段(firstFragment)。在这个片段中,我有一个打开地图活动的地图按钮。在这个地图活动中,我将一个点的纬度和经度放在束中并完成活动并返回到firstfragment。在firstfragment中,我想获得捆绑并显示纬度。 我怎样才能做到这一点?
答案 0 :(得分:0)
参考官方,api:
http://developer.android.com/training/basics/intents/result.html
你应该使用方法
startActivityForResult()
片段上的。
用法示例:
static final int PICK_CONTACT_REQUEST = 1; // The request code
...
private void pickContact() {
Intent pickContactIntent = new Intent(Intent.ACTION_PICK, Uri.parse("content://contacts"));
pickContactIntent.setType(Phone.CONTENT_TYPE); // Show user only contacts w/ phone numbers
startActivityForResult(pickContactIntent, PICK_CONTACT_REQUEST);
}
并实现此方法:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// Check which request we're responding to
if (requestCode == PICK_CONTACT_REQUEST) {
// Make sure the request was successful
if (resultCode == RESULT_OK) {
// The user picked a contact.
// The Intent's data Uri identifies which contact was selected.
// Do something with the contact here (bigger example below)
}
}
}
在您的地图活动中有类似的内容,在您关闭它的代码内部调用,您的“onStop”,“onCancel”,“onbackPressed”,无论您使用什么来关闭它:
private void finishWithResult()
{
Bundle conData = new Bundle();
conData.putFloat("lat", 0.0);
conData.putFloat("lon", 0.0);
Intent intent = new Intent();
intent.putExtras(conData);
setResult(RESULT_OK, intent);
finish();
}