在 onClick 上启动服务 [英] Start a service on onClick
问题描述
我想在用户点击按钮时启动服务.
I want to start a service when the user clicks a button.
基本上,当用户点击开始按钮时,服务应该开始记录 GPS 坐标,当他点击停止时,服务应该终止.
Basically, when the user clicks the start button the service should start recording GPS coordinates and when he clicks stop the service should terminate.
我应该如何实施这个?
推荐答案
我不太确定您为什么要启动服务以开始/停止记录 gps 坐标.所以我给你两个答案.一个将向您展示如何使用按钮启动和停止服务,另一个将向您展示如何开始/停止记录不需要使用服务完成的 GPS 坐标(尽管可以更改为这样做).
I'm not quite sure why you want to start a service in order to start/stop recording gps coordinates. So I'll give you two answers. One will show you how to start and stop a service with buttons and the other will show you how to start/stop recording gps coordinates which does not need to be done with a service (though can be changed to do so).
使用按钮启动/停止服务
您需要做的主要事情是将 android:onClick="functionToCall"
添加到按钮 xml 标记中.将 functionToCall
替换为真实的函数名称.然后您必须使该函数调用 startService()
或 stopService()
函数来启动/停止服务.这是我的示例程序,用于启动/停止名为 SayHello 的服务.
The main thing you have to do is add android:onClick="functionToCall"
to the button xml tag. Replace functionToCall
with the real function name. Then you have to make that function call either the startService()
or stopService()
function to start/stop the service. Here is my example program that starts/stops a service that called SayHello.
您可以忽略以下大部分 xml,只需注意 android:onClick=""
You can ignore most of the following xml just notice the android:onClick=""
main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button android:text="Start"
android:id="@+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="startClicked">
</Button>
<Button android:text="Stop"
android:id="@+id/Button02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="stopClicked">
</Button>
</LinearLayout>
ServiceClick.java(我制作的保存按钮的活动):
ServiceClick.java (the activity I made that holds the buttons):
package com.ServiceClick;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class ServiceClick extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void startClicked(View view) {
startService(new Intent("SayHello"));
}
public void stopClicked(View view) {
stopService(new Intent("SayHello"));
}
}
我确定您不想启动/停止 SayHello 服务,因此请确保更改 Intent 以调用您想要的服务.
I'm sure you don't want to start/stop the SayHello Service, so make sure you change Intent to call for the service you do want.
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