如何传递广播接收者上下文?
我正在开发一个应用程序,它将在收到特定短信(具有特定内容的短信说“测试”)时播放指定的声音/歌曲。因此,如果用户手机收到内容为“test”的消息,则必须播放声音。因此,我使用了 Broadcastreceiver
,它在接收短信时变得活跃并检查特定的所需内容。我已经使用 Soundpool
和 AudioManager
在条件成立时播放声音。
但是,不知何故,该代码对我不起作用。如果可能的话,请看一下并纠正我。我想,我使用了错误的上下文等...
SoundManager.java:
package net.SMSMessaging;
import java.util.HashMap;
import android.content.Context;
import android.media.AudioManager;
import android.media.SoundPool;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
public class SoundManager
{
private SoundPool mSoundPool;
private HashMap<Integer, Integer> mSoundPoolMap;
private AudioManager mAudioManager;
private Context mContext;
public SoundManager()
{
}
public void initSounds(Context theContext) {
mContext = theContext;
mSoundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 0);
mSoundPoolMap = new HashMap<Integer, Integer>();
mAudioManager = (AudioManager)mContext.getSystemService(Context.AUDIO_SERVICE);
}
public void addSound(int Index,int SoundID)
{
mSoundPoolMap.put(1, mSoundPool.load(mContext, SoundID, 1));
}
public int playSound(int index) {
int streamVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
int streamid = mSoundPool.play(mSoundPoolMap.get(index), streamVolume, streamVolume, 1, 0, 1f);
return streamid;
}
}
广播接收器文件 - SMSReceiver.java
package net.SMSMessaging;
import java.util.HashMap;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.telephony.gsm.SmsMessage;
import android.widget.Button;
import android.widget.Toast;
public class SMSReceiver extends BroadcastReceiver
{
private SoundManager mSoundManager;
int id;
Button btn;
@Override
public void onReceive(Context context, Intent intent)
{
//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String str = "";
String str1 = "";
if (bundle != null)
{
//---retrieve the SMS message received---
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++) {
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
str += "SMS from " + msgs[i].getOriginatingAddress();
str += " :";
str1 += msgs[i].getMessageBody().toString();
// str1 += "\n";
}
String str2= "test";
if (str1.equals(str2))
{
Toast.makeText(context,"Matched... Performing operation",0).show();
mSoundManager = new SoundManager();
mSoundManager.initSounds(context); // **This is where may be I m doing wrong. What should be the actual context to be passed??? I tried with getBaseContext() and it is not allowed.**
mSoundManager.addSound(1, R.raw.sound);
mSoundManager.playSound(1);
}
else
{
Toast.makeText(context,"Not matched",0).show();
}
}
}
}
因此,我在 SMSReceiver.java
中标记了我认为我做错的地方。我尝试用 getBaseContext(
)、getApplicationContext()
甚至 this
替换上下文。但是,没有一个运作良好。使用“上下文”不会使应用程序崩溃,但甚至连声音也不会播放。所以,我认为我需要使用不同的上下文。
如果您需要任何详细信息,请告诉我。
I am developing an application which will play a specified sound/song on receiving a specific sms (sms with specific content say "test"). Thus, if user phone receives a message with content "test", a sound must be played. So, I have used a Broadcastreceiver
which becomes active on receiving SMS and checks for specific required content. I have used Soundpool
and AudioManager
for playing sound if condition becomes true.
But, somehow, the code is not working for me. Please take a look and correct me, if possible. I guess, I am using wrong context or such...
SoundManager.java:
package net.SMSMessaging;
import java.util.HashMap;
import android.content.Context;
import android.media.AudioManager;
import android.media.SoundPool;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
public class SoundManager
{
private SoundPool mSoundPool;
private HashMap<Integer, Integer> mSoundPoolMap;
private AudioManager mAudioManager;
private Context mContext;
public SoundManager()
{
}
public void initSounds(Context theContext) {
mContext = theContext;
mSoundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 0);
mSoundPoolMap = new HashMap<Integer, Integer>();
mAudioManager = (AudioManager)mContext.getSystemService(Context.AUDIO_SERVICE);
}
public void addSound(int Index,int SoundID)
{
mSoundPoolMap.put(1, mSoundPool.load(mContext, SoundID, 1));
}
public int playSound(int index) {
int streamVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
int streamid = mSoundPool.play(mSoundPoolMap.get(index), streamVolume, streamVolume, 1, 0, 1f);
return streamid;
}
}
Broadcastreceiver file - SMSReceiver.java
package net.SMSMessaging;
import java.util.HashMap;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.telephony.gsm.SmsMessage;
import android.widget.Button;
import android.widget.Toast;
public class SMSReceiver extends BroadcastReceiver
{
private SoundManager mSoundManager;
int id;
Button btn;
@Override
public void onReceive(Context context, Intent intent)
{
//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String str = "";
String str1 = "";
if (bundle != null)
{
//---retrieve the SMS message received---
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++) {
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
str += "SMS from " + msgs[i].getOriginatingAddress();
str += " :";
str1 += msgs[i].getMessageBody().toString();
// str1 += "\n";
}
String str2= "test";
if (str1.equals(str2))
{
Toast.makeText(context,"Matched... Performing operation",0).show();
mSoundManager = new SoundManager();
mSoundManager.initSounds(context); // **This is where may be I m doing wrong. What should be the actual context to be passed??? I tried with getBaseContext() and it is not allowed.**
mSoundManager.addSound(1, R.raw.sound);
mSoundManager.playSound(1);
}
else
{
Toast.makeText(context,"Not matched",0).show();
}
}
}
}
So, I have marked the place where I think I am doing wrong in SMSReceiver.java
. I have tried replacing the context with getBaseContext(
), getApplicationContext()
and even this
. But, none is working well. The use of "context" is not crashing the application, but even the sound is not played. So, I think I need to use a different context.
Please let me know if you need any detail.
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