让应用程序始终在 Android 上后台运行

Keep app running in background on Android all the time(让应用程序始终在 Android 上后台运行)

问题描述

我必须获取人们的轨迹(例如，从家到工作)，所以我的应用获取纬度和经度(我有两个按钮:1. 开始获取纬度和经度 2. 停止获取纬度和经度).但是，我希望 android 不会杀死应用程序，我希望在用户使用 facebook、twitter(例如)或只是用户锁定他的智能手机时让我的应用程序保持运行.当用户在使用 facebook 或 twitter(例如)时使用该应用程序时，我的应用程序运行良好，但是当我锁定我的智能手机时，Android 会终止该应用程序.我曾尝试使用 intentservice 和 service，但当我锁定屏幕时它们不起作用.我应该使用 PowerManager.WakeLock 吗?我不完全知道它是如何工作的以及它的作用.

I have to get people's trajectory (from home to job, for example), so my app gets latitude and longitude (I have two buttons: 1. Start to get lat and lon 2. Stop to get lat and lon). However, I want that android does not kill the app, I want to keep my application running while the user use facebook, twitter (for example) or simply the user locks his smartphone. My app works fine when user use the app while using facebook or twitter (for example), but when I lock my smartphone, Android kill the app. I have tried to use intentservice and service, but they do not work when I lock the screen. Should I use PowerManager.WakeLock? I do not exactly know how it works and what it does.

这是我尝试服务的一个例子，我不知道我是否错了，但它在以下情况下不起作用:1.我在app里(我已经启动了服务)2.我点击主页按钮(在服务运行时)3.我锁屏.4.然后服务和应用程序被android杀死(并且服务没有完成它的工作)

This is an example that I made to try services, I don't know if I am wrong, but it does not work when: 1. I am in the app (I have started the service) 2. I tap home button (while service is running) 3. I lock screen. 4. Then the service and the app are killed by android (and the service did not finished to do its stuff)

清单

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.javosoft.intentservice">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name=".MyService"
            android:exported="false"></service>

    </application>

</manifest>

activity_main

activity_main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.javosoft.intentservice.MainActivity">

    <Button
        android:text="start Service"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="63dp"
        android:id="@+id/button"
        android:onClick="startService"/>

    <Button
        android:text="Stop Service"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignLeft="@+id/button"
        android:layout_alignStart="@+id/button"
        android:layout_marginBottom="68dp"
        android:id="@+id/button2"
        android:onClick="stopService" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:hint="textito :D"
        android:ems="10"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:id="@+id/editText" />
</RelativeLayout>

主活动

package com.javosoft.intentservice;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        button = (Button) findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this, MyService.class);
                startService(intent);
            }
        });

    }

    public void stopService (View view){
        Intent intent = new Intent(this, MyService.class);
        stopService(intent);
    }
}

我的服务类

package com.javosoft.intentservice;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.util.Log;
import android.widget.Toast;

public class MyService extends Service {

    final class MyThreadClass implements Runnable{

        int service_id;
        MyThreadClass(int service_id){
            this.service_id = service_id;
        }

        @Override
        public void run() {

            synchronized (this){
                int count = 0;
                while (count < 10){
                    Log.i("servicio", "while: " + String.valueOf(count));
                    try {
                        wait(2000);
                        count++;
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
            stopSelf(service_id);

        }
    }

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Toast.makeText(this, "El servició ha empezado D:", Toast.LENGTH_SHORT).show();
        Log.i("servicio", "El servició ha empezado D:");


        Log.i("servicio", "onStartCommand arriba");

        Thread thread = new Thread(new MyThreadClass(startId));
        thread.start();

        Log.i("servicio", "onStartCommand abajo");
        return START_STICKY;
        //return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public void onDestroy() {
        //super.onDestroy();
        Toast.makeText(this, "El servicio ha padarado ._.", Toast.LENGTH_SHORT).show();
        Log.i("servicio", "El servicio ha padarado ._.");
    }

    //@Nullable
    @Override
    public IBinder onBind(Intent intent) {

        return null;

    }
}

推荐答案

我看了一些智能手机有这样的问题，我发现华为、小米等在实现服务上都有问题，猜猜看:我的智能手机是华为.问题出在这些设备上预装的节能程序.因此，我尝试在 Nexus(这个模拟器)、Sony 和 Moto G 上运行我的程序，该程序在这 3 台设备上运行良好.感谢您的帮助.

I've read that some smartphones have these kind of problems, I found that Huawei, Xiaomi among others have problems with implementation Services, and guess what: My smartphone is a Huawei. The problem comes out of programs preinstalled on these devices for energy saving. Therefore, I tried to run my program on a Nexus (simulator for this one), a Sony and a Moto G, the program ran well for these 3 devices. Thanks for help.

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