广播示例

通过广播实现对特定号码的拦截，写两个按钮，一个是正常拨号，一个是拨号后进行拦截

注意要在配置文件内添加权限

样式

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/bt1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="call"
        android:text="正常拨号" />

    <Button
        android:id="@+id/bt2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="block"
        android:text="加入拦截" />
</LinearLayout>

Activity

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package com.example.broadcastreceiver;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button bt1=(Button)findViewById(R.id.bt1);
        Button bt2=(Button)findViewById(R.id.bt2);
    }

    public void call(View v){
        Intent i = new Intent("正常拨号123456");
        sendOrderedBroadcast(i,null);
    }

    public void block(View v){
        Intent i = new Intent("被拦截的拨号123456");
        sendOrderedBroadcast(i,null);
    }
}

接收者类

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package com.example.broadcastreceiver;

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

    public class MyBroadcastReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            String str=intent.getAction().toString();
            Toast.makeText(context,"接收到的广播信息:"+str, Toast.LENGTH_SHORT).show();
        }
    }

拦截类

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package com.example.broadcastreceiver;

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

public class MyBlock extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            String str1=intent.getAction().toString();
            Toast.makeText(context,"拦截到的广播信息:"+str1, Toast.LENGTH_SHORT).show();
            abortBroadcast();
            Toast.makeText(context,"已清除广播", Toast.LENGTH_SHORT).show();
        }
    }

manifest

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:dist="http://schemas.android.com/apk/distribution"
    package="com.example.broadcastreceiver">

    <dist:module dist:instant="true" />
    <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">

        <receiver
            android:name=".MyBroadcastReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter android:priority="0">
                <action android:name="正常拨号123456"/>
                <action android:name="被拦截的拨号123456"/>
            </intent-filter>
        </receiver>

        <receiver
            android:name=".MyBlock"
            android:enabled="true"
            android:exported="true">
            <intent-filter android:priority="1">
                <action android:name="被拦截的拨号123456"/>
            </intent-filter>
        </receiver>

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

结果