电话状态的广播接收器更改无效 [英] Broadcast receiver for Phone State changed not working
问题描述
我已经创建了一个用于更改电话状态的广播接收器。但广播无法正常工作。我已经尝试了几个小时并尝试了2,3个解决方案，但仍然无法正常工作。互联网上的其他人具有相同的代码，对于他们来说工作正常。我不知道我在哪里犯错。需要你的帮助！
这是我的清单文件
i have created a broadcast receiver for Phone state change. but the broadcast is not working. i have been trying from couple of hours and tried 2,3 solutions but still its not working. other guys over internet have same code and the is working fine for them. i don't know where i am making mistake. need your help! Here are my manifest File
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="veclar.map.callandsmsblocking">
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".PhoneCallReceiver" >
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.NEW_OUTGOING_CALL"/>
</intent-filter>
</receiver>
</application>
</manifest>
这是我的PhoneCallReceiver类
and here is my PhoneCallReceiver class
public abstract class PhoneCallReceiver extends BroadcastReceiver {
//The receiver will be recreated whenever android feels like it. We need a static variable to remember data between instantiations
private static int lastState = TelephonyManager.CALL_STATE_IDLE;
private static Date callStartTime;
private static boolean isIncoming;
private static String savedNumber; //because the passed incoming is only valid in ringing
@Override
public void onReceive(Context context, Intent intent) {
//We listen to two intents. The new outgoing call only tells us of an outgoing call. We use it to get the number.
if (intent.getAction().equals("android.intent.action.NEW_OUTGOING_CALL")) {
savedNumber = intent.getExtras().getString("android.intent.extra.PHONE_NUMBER");
}
else{
String stateStr = intent.getExtras().getString(TelephonyManager.EXTRA_STATE);
String number = intent.getExtras().getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
int state = 0;
if(stateStr.equals(TelephonyManager.EXTRA_STATE_IDLE)){
state = TelephonyManager.CALL_STATE_IDLE;
}
else if(stateStr.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)){
state = TelephonyManager.CALL_STATE_OFFHOOK;
}
else if(stateStr.equals(TelephonyManager.EXTRA_STATE_RINGING)){
state = TelephonyManager.CALL_STATE_RINGING;
}
onCallStateChanged(context, state, number);
}
}
//Incoming call- goes from IDLE to RINGING when it rings, to OFFHOOK when it's answered, to IDLE when its hung up
//Outgoing call- goes from IDLE to OFFHOOK when it dials out, to IDLE when hung up
public void onCallStateChanged(Context context, int state, String number) {
if(lastState == state){
//No change, debounce extras
return;
}
switch (state) {
case TelephonyManager.CALL_STATE_RINGING:
isIncoming = true;
callStartTime = new Date();
savedNumber = number;
Toast.makeText(context, "Incoming Call Ringing" , Toast.LENGTH_SHORT).show();
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
//Transition of ringing->offhook are pickups of incoming calls. Nothing done on them
if(lastState != TelephonyManager.CALL_STATE_RINGING){
isIncoming = false;
callStartTime = new Date();
Toast.makeText(context, "Outgoing Call Started" , Toast.LENGTH_SHORT).show();
}
break;
case TelephonyManager.CALL_STATE_IDLE:
//Went to idle- this is the end of a call. What type depends on previous state(s)
if(lastState == TelephonyManager.CALL_STATE_RINGING){
//Ring but no pickup- a miss
Toast.makeText(context, "Ringing but no pickup" + savedNumber + " Call time " + callStartTime +" Date " + new Date() , Toast.LENGTH_SHORT).show();
}
else if(isIncoming){
Toast.makeText(context, "Incoming " + savedNumber + " Call time " + callStartTime , Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(context, "outgoing " + savedNumber + " Call time " + callStartTime +" Date " + new Date() , Toast.LENGTH_SHORT).show();
}
break;
}
lastState = state;
}
}
推荐答案
您无法再通过这种方式接收PHONE_STATE_CHANGED广播。
You canno longer receive PHONE_STATE_CHANGED broadcast this way.
来自官方Android开发人员指南 https://developer.android.com/guide/components/broadcasts ：
From official Android developer guide https://developer.android.com/guide/components/broadcasts :
从Android开始8.0（API级别26），系统会对清单声明的接收者施加
的附加限制。
Beginning with Android 8.0 (API level 26), the system imposes additional restrictions on manifest-declared receivers.
如果您的应用程序针对Android 8.0或更高版本，则不能使用清单
声明大多数隐式广播的接收方（
并非专门针对您的应用的广播）。当用户正在积极使用您的应用时，您仍然可以使用
上下文注册的接收器。
If your app targets Android 8.0 or higher, you cannot use the manifest to declare a receiver for most implicit broadcasts (broadcasts that don't target your app specifically). You can still use a context-registered receiver when the user is actively using your app.
您必须使用显式广播收件人（从您的活动中注册）以接收PHONE_STATE_CHANGED广播。
You must use explicit broadcast receivers (registered from your activity) to receive PHONE_STATE_CHANGED broadcast.
public class ToastDisplay extends Activity {
private BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(getApplicationContext(), "received", Toast.LENGTH_SHORT);
}
};
@Override
protected void onResume() {
IntentFilter filter = new IntentFilter();
filter.addAction("android.intent.action.PHONE_STATE");
registerReceiver(receiver, filter);
super.onResume();
}
@Override
protected void onPause() {
unregisterReceiver(receiver);
super.onPause();
}
}
此外，您除了声明所需的许可外，例如<清单中的code> android.permission.READ_PHONE_STATE ， android.permission.PROCESS_OUTGOING_CALLS ，您必须在运行时从用户明确获得这些权限-时间。否则，您将不会收到某些（大多数）系统广播。
Android开发人员指南很好地解释了如何向用户和代码示例请求权限。
https://developer.android.com/training/permissions/requesting
Also, you in addition to declare required permission like android.permission.READ_PHONE_STATE , android.permission.PROCESS_OUTGOING_CALLS in the manifest , you must obtain those permissions explicitly from user at run-time. Otherwise you will not receive some(most) system broadcasts.
Android developer guide has a nice explanation on requesting permissions from user and code sample.
https://developer.android.com/training/permissions/requesting
这篇关于电话状态的广播接收器更改无效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！
