android的电话监听

新建一个项目,结构图如下:

PhoneService:

package com.demo.tingdianhua;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.telecom.TelecomManager;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

public class PhoneService extends Service {

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public void onCreate() {

        System.out.println("onCreate");
        //1.获取telephone的实例
        TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);

        //2.注册电话的监听
        tm.listen(new MyPhoneStateListener(), PhoneStateListener.LISTEN_CALL_STATE);

    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    public class MyPhoneStateListener extends PhoneStateListener {

        //当电话设置状态发生改变的时候调用
        public void onCallStateChanged(int state, String phoneNumber) {
            System.out.println("state==>"+state);
            System.out.println("phoneNumber==>"+phoneNumber);

            //具体判断下电话得状态
            switch (state) {
                case TelephonyManager.CALL_STATE_IDLE:

                    System.out.println("停止");
                    break;

                case TelephonyManager.CALL_STATE_OFFHOOK://接听状态
                    System.out.println("开始录");

                    break;

                case TelephonyManager.CALL_STATE_RINGING://电话响铃状态

                    System.out.println("准备一个录音机");

                    break;

                default:

                    break;

            }

            super.onCallStateChanged(state, phoneNumber);
        }
    }

}

MainActivity:

package com.demo.tingdianhua;

import android.content.Intent;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    private String [] phone={
            "android.permission.READ_PHONE_STATE"
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ActivityCompat.requestPermissions(this,phone,1);
    }

    public void clickphone(View view) {
        Intent intent = new Intent(MainActivity.this,PhoneService.class);
        startService(intent);
    }
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:onClick="clickphone"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开启服务"
        />

</android.support.constraint.ConstraintLayout>

AndroidManifest.xml:

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

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

    <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>

        <service
            android:name=".PhoneService"
            android:enabled="true"
            android:exported="true"></service>
    </application>

</manifest>

原文地址：https://www.cnblogs.com/charlypage/p/10316719.html