我如何才能让这个电话状态广播接收器一直工作?(不停)

Question

我正在创建一个应用程序，它将在调用状态前后显示toast消息。我在手机上生成并安装了我的应用程序几天后，有时几小时后，它工作得很好但在那之后，它就停止了，为了运行应用程序，我需要再次打开应用程序。如何修改我的应用程序以使其运行良好？谢谢

清单

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_CALL_LOG" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.INTERNET" />

<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"></activity>
<activity android:name=".MainActivity2">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity> <!-- This part is inside the application -->
<receiver
android:name=".CallReceiver"
android:enabled="true">
<intent-filter android:priority="999">
<action android:name="android.intent.action.PHONE_STATE" />
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.NEW_OUTGOING_CALL" />
</intent-filter>
</receiver>
</application>
</manifest>

MainActivity.class

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
checkAndRequestPermissions();
}
private  boolean checkAndRequestPermissions() {
int readPhoneState = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE);
int read_call_log = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CALL_LOG);
List listPermissionsNeeded = new ArrayList<>();
if (readPhoneState != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.READ_PHONE_STATE);
}
if (read_call_log != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.READ_CALL_LOG);
}
if (read_call_log != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.PROCESS_OUTGOING_CALLS);
}
if (read_call_log != PackageManager.PERMISSION_GRANTED) {
listPermissionsNeeded.add(Manifest.permission.INTERNET);
}
if (!listPermissionsNeeded.isEmpty()) {
ActivityCompat.requestPermissions(this,
(String[]) listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]),
REQUEST_ID_MULTIPLE_PERMISSIONS);
return false;
}
return true;
}

CallRecive.class

public class CallReceiver extends BroadcastReceiver{

@Override
public void onReceive(Context context, Intent intent) {
try {
runfirstTime(context,intent);
Toast.makeText(context, "1st", Toast.LENGTH_SHORT).show();
} catch (Exception ex) {
try {
}
catch (Exception e)
{
}
}
}
}

Answer 1

除非创建前台服务，否则新版本的Android不允许您实现您想要实现的目标。

安卓不希望应用程序在用户不知情的情况下在后台运行。

所以您需要创建一个前台服务，并在通知面板中显示一个持久通知。然后，您可以从前景服务创建一个BroadcastReceiver。

使用下面的代码将您的服务作为前台服务启动

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
context.startForegroundService(intent);
}
else {
context.startService(intent); 
}

在服务onCreate((中，做一些类似的东西：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
startForeground(1, new Notification());
}

下面的链接将让您对前景服务有更多的了解。

https://blog.logimonk.com/post/foreground-service-in-android

https://medium.com/@调试是un/android-o-work-around-background-service-limitation-e697b2192bc3

从服务创建您的BroadcastReceiver