为什么broadcastreciver不接收广播？ [英] Why broadcastreciver doesn't receive the broadcast?

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问题描述

由于在问题中提到，下面显示万亩code ..

AlarmActivity 

 包adham.test;进口android.app.Activity;
进口android.content.Context;
进口android.content.Intent;
进口android.os.Bundle;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.widget.Button;公共类AlarmActivity延伸活动{
    / **当第一次创建活动调用。 * /
    按钮btnStart，btnStop;
    上下文语境;
    @覆盖
    公共无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.main）;
        btnStart =（按钮）this.findViewById（R.id.btnStart）;
        btnStop =（按钮）this.findViewById（R.id.btnstop）;
        上下文= this.getApplicationContext（）;        startService（新意图（上下文，AlarmService.class））;
        btnStart.setOnClickListener（新OnClickListener（）{            @覆盖
            公共无效的onClick（查看为arg0）{
                startService（新意图（上下文，AlarmService.class））;
            }        }）;
        btnStop.setOnClickListener（新OnClickListener（）{            @覆盖
            公共无效的onClick（查看为arg0）{
                stopService（新意图（上下文，AlarmService.class））;            }        }）;
    }
}

AlarmReceiver 

 包adham.test;进口android.content.BroadcastReceiver;
进口android.content.Context;
进口android.content.Intent;
进口android.os.Bundle;
进口android.util.Log;
进口android.widget.Toast;公共类AlarmReceiver扩展广播接收器{    @覆盖
    公共无效的onReceive（上下文C，意图我）{
        尝试{
            束B = i.getExtras（）;
            弦乐味精= b.getString（alarm_message）;
            Log.d（Receiverr ---，现在）;
            Toast.makeText（C，味精，Toast.LENGTH_LONG）.show（）;
        }赶上（例外五）{        }
    }}

AlarmService 

 包adham.test;进口的java.util.Calendar;进口android.app.AlarmManager;
进口android.app.PendingIntent;
进口android.app.Service;
进口android.content.Context;
进口android.content.Intent;
进口android.os.IBinder;
进口android.widget.Toast;公共类AlarmService延伸服务{
    私有静态最后弦乐TAG =为MyService
    上下文℃;
    @覆盖
    公众的IBinder onBind（意向为arg0）{
        // TODO自动生成方法存根
        返回null;
    }
    @覆盖
    公共无效的onCreate（）{
        Toast.makeText（这一点，我的服务创建Toast.LENGTH_LONG）.show（）;
        C =这一点;        }
    @覆盖
    公共无效调用onStart（意向意图，诠释startid）{
        Toast.makeText（这一点，我的服务启动，Toast.LENGTH_LONG）.show（）;        日历CAL = Calendar.getInstance（）;
        cal.add（Calendar.SECOND，10）;        意图I =新意图（C，AlarmReceiver.class）;
        i.putExtra（alarm_message，你好，报警运行！）;
        PI的PendingIntent = PendingIntent.getActivity（C，19237，我，PendingIntent.FLAG_UPDATE_CURRENT）;
        AlarmManager AM =（AlarmManager）c.getSystemService（ALARM_SERVICE）;        am.set（AlarmManager.RTC_WAKEUP，cal.getTimeInMillis（），PI）;        }
    @覆盖
    公共无效的onDestroy（）{
        Toast.makeText（这一点，我的服务毁，Toast.LENGTH_LONG）.show（）;    }
}

的Andr​​oidManifest.xml 

 ＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT;清单的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
      包=adham.test
      安卓版code =1
      机器人：=的versionName1.0＆GT;
    ＆LT;采用-SDK安卓的minSdkVersion =9/＆GT;    ＆lt;应用机器人：图标=@绘制/图标机器人：标签=@字符串/ APP_NAME＆GT;
        ＆LT;活动机器人：名字=。TestServicesActivity
                  机器人：标签=@字符串/ APP_NAME＆GT;
            ＆所述;意图滤光器＆gt;
                ＆lt;作用机器人：名字=android.intent.action.MAIN/＆GT;
                ＆LT;类机器人：名字=android.intent.category.LAUNCHER/＆GT;
            ＆所述; /意图滤光器＆gt;
        ＆LT; /活性GT;
        ＆LT;服务机器人：名字=。AlarmService＆GT;＆LT; /服务＆GT;
        ＆LT;活动机器人：名字=。AlarmActivity＆GT;＆LT; /活性GT;
        ＆lt;接收安卓过程=：遥控机器人：名字=。AlarmReceiver＆GT;＆LT; /接收器＆GT;
    ＆LT; /用途＆gt;
＆LT; /清单＆GT;


解决方案

我觉得你从来没有提出任何广播。您code显示：

 意向书I =新意图（C，AlarmReceiver.class）;
i.putExtra（alarm_message，你好，报警运行！）;
PI的PendingIntent = PendingIntent.getActivity（C，19237，我，PendingIntent.FLAG_UPDATE_CURRENT）;

您在呼唤 getActivity ，但 AlarmReceiver 是广播，您需要调用 getBroadcast（...）代替。

As mentioned in the question, and the following shows mu code ..

AlarmActivity

package adham.test;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class AlarmActivity extends Activity {
    /** Called when the activity is first created. */
    Button btnStart,btnStop;
    Context context;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btnStart=(Button)this.findViewById(R.id.btnStart);
        btnStop=(Button)this.findViewById(R.id.btnstop);
        context = this.getApplicationContext();

        startService(new Intent(context,AlarmService.class));


        btnStart.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {
                startService(new Intent(context,AlarmService.class));
            }

        }); 
        btnStop.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {
                stopService(new Intent(context,AlarmService.class));

            }

        });
    }
}

AlarmReceiver

package adham.test;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context c, Intent i) {
        try{
            Bundle b = i.getExtras();
            String msg = b.getString("alarm_message");
            Log.d("Receiverr ---","now");
            Toast.makeText(c, msg, Toast.LENGTH_LONG).show();
        }catch(Exception e){

        }


    }

}

AlarmService

package adham.test;

import java.util.Calendar;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;

public class AlarmService extends Service {
    private static final String TAG = "MyService";  
    Context c;
    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }
    @Override   
    public void onCreate() {
        Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
        c= this;

        }
    @Override
    public void onStart(Intent intent, int startid) {   
        Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();

        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.SECOND, 10);

        Intent i = new Intent(c,AlarmReceiver.class);
        i.putExtra("alarm_message", "Hello, Alarm is running !");
        PendingIntent pi= PendingIntent.getActivity(c, 19237, i, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager am = (AlarmManager)c.getSystemService(ALARM_SERVICE);

        am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pi);

        }
    @Override
    public void onDestroy(){
        Toast.makeText(this, "My Service Destroyed", Toast.LENGTH_LONG).show();

    }


}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="adham.test"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="9" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".TestServicesActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name=".AlarmService"></service>
        <activity android:name=".AlarmActivity"></activity>
        <receiver  android:process=":remote" android:name=".AlarmReceiver"></receiver>
    </application>
</manifest>

解决方案

I think you never raise any broadcast. Your code shows:

Intent i = new Intent(c,AlarmReceiver.class);
i.putExtra("alarm_message", "Hello, Alarm is running !");
PendingIntent pi= PendingIntent.getActivity(c, 19237, i, PendingIntent.FLAG_UPDATE_CURRENT);

You are calling getActivity but AlarmReceiver is a Broadcast, you need to call getBroadcast(...) instead.

这篇关于为什么broadcastreciver不接收广播？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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