广播接收器未收到消息

时间:2019-11-04 19:09:23

标签: android kotlin broadcastreceiver

我正在创建两个应用程序-第一个发送广播,第二个应该获取广播。

发送以下信息的应用程序:

清单中声明的​​权限:

    <permission-group
            android:name="com.example.smbmp1.permissions"
            android:label="my permissions group"/>

    <permission
            android:name="com.example.smbmp1.permissions.PRODUCT_BROADCAST_PERMISSION"
            android:label="PRODUCT_BROADCAST_PERMISSION"
            android:permissionGroup="com.example.smbmp1.permissions"/>

    <uses-permission android:name="com.example.smbmp1.permissions.PRODUCT_BROADCAST_PERMISSION"/>

负责发送的代码片段:

    private fun populateProduct(product: Product) {
        Intent().also { intent ->
            intent.action = "com.example.smbmp1.PRODUCT_BROADCAST"
            intent.putExtra("id", product.id)
            intent.putExtra("name", product.name)
            intent.putExtra("price", product.price)
            intent.putExtra("quantity", product.quantity)
            sendBroadcast(intent, Manifest.permission.PRODUCT_BROADCAST_PERMISSION)
        }
    }

接收以下内容的应用程序:

注册接收者:

        <receiver
                android:name=".ProductReceiver"
                android:enabled="true"
                android:exported="true"
                android:process=":remote"
                android:permission="com.example.smbmp1.permissions.PRODUCT_BROADCAST_PERMISSION">
                <intent-filter >
                    <action android:name="com.example.smbmp1.PRODUCT_BROADCAST" />
                </intent-filter>
        </receiver>

也声明了权限清单(我也在尝试在第二个应用中未声明):

    <permission-group
            android:name="com.example.smbmp1.permissions"
            android:label="my permissions group"/>

    <permission
            android:name="com.example.smbmp1.permissions.PRODUCT_BROADCAST_PERMISSION"
            android:label="PRODUCT_BROADCAST_PERMISSION"
            android:permissionGroup="com.example.smbmp1.permissions"/>

    <uses-permission android:name="com.example.smbmp1.permissions.PRODUCT_BROADCAST_PERMISSION"/>

简单的接收方代码:

package com.example.smbmp2

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.widget.Toast

class ProductReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context, intent: Intent) {
        Toast.makeText(context, "Receiver", Toast.LENGTH_LONG).show()
    }
}

问题是,没有触发接收器。我经历了所有堆栈溢出问题,但所有答案都无济于事。我试图将类别设置为意图,设置标志等。

有什么建议吗?

编辑

我也尝试过动态注册广播接收器:

package com.example.smbmp2

import android.content.IntentFilter
import android.support.v7.app.AppCompatActivity
import android.os.Bundle



class MainActivity : AppCompatActivity() {

    private lateinit var productReceiver: ProductReceiver

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }

    override fun onStart() {
        super.onStart()
        productReceiver = ProductReceiver()
        registerReceiver(productReceiver, IntentFilter("com.example.smbmp1.PRODUCT_BROADCAST"), Manifest.permission.PRODUCT_BROADCAST_PERMISSION, null)
    }

    override fun onStop() {
        super.onStop()
        unregisterReceiver(productReceiver)
    }
}

2 个答案:

答案 0 :(得分:0)

尝试一下? https://stackoverflow.com/a/33611355/9392134

您忘记了使用软件包和BroadCast Receiver类来设置ComponentName。

答案 1 :(得分:0)

我已经解决了问题。首先,我将动态注册从onStart方法移至onCreate方法,并将取消注册从onStop移至onDestroy。之后,我升级了android studio,就解决了这个问题。