我正在构建一个Android应用程序,它接收SMS消息并从特定的网关/发送者显示它们。
问题是,如果我在AndroidManifest文件中声明接收器,它会一直接收来自所有人的消息,即使应用程序暂停/关闭也是如此。每当我没有在应用程序上收到短信时,这会导致应用程序强制崩溃。
这是我在ReceieveMessage.java中的代码
package com.phoenix.omnisurf;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
public class ReceiveMessage extends BroadcastReceiver {
private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
public static String messageBody = "";
@Override
public void onReceive(Context context, Intent intent) {
final Bundle bundle = intent.getExtras();
if (bundle != null) {
messageBody = "";
Object[] pdus = (Object[])bundle.get("pdus");
for (int i = 0; i < pdus.length; i++) {
SmsMessage messageHandler = SmsMessage.createFromPdu((byte[]) pdus[i]);
messageBody += messageHandler.getDisplayMessageBody();
}
SurfActivity.mThis.messageContainer.setText(messageBody);
}
}
}
我还在我的Manifest上注册了以下接收者:
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<!-- Message Receiver -->
<receiver android:name=".ReceiveMessage">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
如何创建仅在特定活动打开或应用程序运行时打开的广播接收器?
答案 0 :(得分:2)
只需检查您的活动是否在前台
将此添加到您的活动中 private static boolean isInForeground;
onResume(){
super.onResume();
isInForground = true;
}
onPause(){
super.onPause();
isInForground = false;
}
在你的Receiver班中查看
if(SurfActivity.isInForeground){
SurfActivity.mThis.messageContainer.setText(messageBody);
}
答案 1 :(得分:2)
您可以动态注册接收器:
@Override
protected void onResume() {
super.onResume();
final IntentFilter filter = new IntentFilter("android.provider.Telephony.SMS_RECEIVED");
registerReceiver(mBroadcastReceiver, filter);
}
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mBroadcastReceiver);
}