Question

我对android studio开发很新，所以答案可能很简单。话虽这么说，我现在已经把问题困扰了一天：/

即使使用AlarmManager关闭应用程序，我也会每隔10秒运行一段代码。

我复制粘贴了本指南https://guides.codepath.com/android/Starting-Background-Services

中的建议

我对结果感到有些困惑 - 我想我每隔10秒就会触发一次警报，如日志中所示：

04-20 21：25：44.125 557-632 /？ D / AlarmManager：触发报警22ad4130 RTC_WAKEUP IntentSender {220fb650：PendingIntentRecord {2243b570 com.example.somelocation.myapplication broadcastIntent}} 04-20 21：25：44.125 557-557 /？ V / AlarmManager：触发：flg = 0x14 CMP = com.example.somelocation.myapplication / .MyAlarmReceiver

但是我看不到我的BroadcastReceiver或我的IntentService中的任何自定义日志。

MyTestService：

package com.example.somelocation.myapplication;

import android.app.IntentService;
import android.content.Intent;
import android.util.Log;

public class MyTestService extends IntentService {
    public MyTestService() {
        super("MyTestService");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        // Do the task here
        Log.i("MyTestService", "Service running"); // Can't see this log
    }
}

MyAlarmReceiver：

package com.example.somelocation.myapplication;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class MyAlarmReceiver extends BroadcastReceiver {
    public static final int REQUEST_CODE = 12345;

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.e("MyTestService","broadcastreciever onReceive called"); // Can't see this log
        Intent i = new Intent(context, MyTestService.class);
        i.putExtra("foo", "bar");
        context.startService(i);
    }
}

主要活动：

package com.example.somelocation.myapplication;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private TextView batteryInfo;

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

    public void scheduleAlarm() {
        Intent intent = new Intent(getApplicationContext(), MyAlarmReceiver.class);
        final PendingIntent pIntent = PendingIntent.getBroadcast(this, MyAlarmReceiver.REQUEST_CODE,
                intent, PendingIntent.FLAG_UPDATE_CURRENT);
        long firstMillis = System.currentTimeMillis(); 
        AlarmManager alarm = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
        alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, firstMillis,
               10000, pIntent);
    }
}

我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.somelocation.myapplication">
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <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"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <receiver
                android:name=".MyAlarmReceiver"
                android:process=":remote" >
            </receiver>
            <service
                android:name=".MyTestService"
                android:exported="false"/>
        </activity>

    </application>

</manifest>

我错过了什么？

更新得到它了！这是我的清单文件中的错误：主要活动的关闭标记是在接收者声明之后。应该是：

    <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"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

        <receiver
            android:name=".MyAlarmReceiver"
            android:process=":remote" >
        </receiver>
        <receiver
            android:name=".BootReceiver"
            android:enabled="true"
            android:exported="true"/>


</application>

Answer 1

日志正在控制台上打印......这是我正在获取的日志

04-22 18:30:28.421 1830-4146/com.example.somelocation.myapplication I/MyTestService: Service running
04-22 18:30:45.337 2641-2641/com.example.somelocation.myapplication:remote E/MyTestService: broadcastreciever onReceive called
04-22 18:30:45.344 1830-4394/com.example.somelocation.myapplication I/MyTestService: Service running
04-22 18:30:48.4032641-2641/com.example.somelocation.myapplication:remote E/MyTestService: broadcastreciever onReceive called

您正在为BroadcastReceiver创建一个单独的进程（'remote'），您的logcat可能会被设置为首先仅显示主进程。

查看截图 -

因此，从下拉列表中更改应用程序进程，并选择日志级别为Verbose。

为什么我看不到AlarmManager触发的代码片段日志？

1 个答案: