仅在 运行 中的 Activity 时接收短信
Receive SMS Messages only when Activity in Running
我正在构建一个 Android 应用程序,它接收 SMS 消息并显示来自特定 gateway/sender 的消息。
问题是,如果我在 AndroidManifest 文件中声明接收者,它会一直接收来自所有人的消息,即使应用是 paused/closed。每当我不在应用程序上时收到短信,这都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);
}
}
}
我的清单上还注册了以下接收器:
<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 activity 打开或应用 运行 时才打开的广播接收器?
只需检查您的 Activity 是否在前台
将此添加到您的 Activity
private static boolean isInForeground;
onResume(){
super.onResume();
isInForground = true;
}
onPause(){
super.onPause();
isInForground = false;
}
然后在您的接收器中class检查
if(SurfActivity.isInForeground){
SurfActivity.mThis.messageContainer.setText(messageBody);
}
您可以动态注册您的接收器:
@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);
}
我正在构建一个 Android 应用程序,它接收 SMS 消息并显示来自特定 gateway/sender 的消息。
问题是,如果我在 AndroidManifest 文件中声明接收者,它会一直接收来自所有人的消息,即使应用是 paused/closed。每当我不在应用程序上时收到短信,这都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);
}
}
}
我的清单上还注册了以下接收器:
<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 activity 打开或应用 运行 时才打开的广播接收器?
只需检查您的 Activity 是否在前台
将此添加到您的 Activity private static boolean isInForeground;
onResume(){
super.onResume();
isInForground = true;
}
onPause(){
super.onPause();
isInForground = false;
}
然后在您的接收器中class检查
if(SurfActivity.isInForeground){
SurfActivity.mThis.messageContainer.setText(messageBody);
}
您可以动态注册您的接收器:
@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);
}