Android学习记录（二十一）

TelephonyManager(电话管理器)

获得其他app的Context,而这个Context代表访问该app的全局信息的接口,而决定应用的唯一标识 是应用的包名,所以我们可以通过应用包名获得对应app的Context 另外有一点要注意的是：其他应用的SP文件是否能被读写的前提就是SP文件是否指定了可读或者 可写的权限，我们上面创建的是MODE_PRIVATE的就不可以了

1.如何获得TelephonyManager的服务对象

TelephonyManager tManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);

2.案例演示

2.1 调用拨号器拨打电话号码

Uri uri=Uri.parse("tel:"+电话号码);    
Intent intent=new Intent(Intent.ACTION_DIAL,uri);    
startActivity(intent);  

2.2 获取Sim卡信息与网络信息

（1）新建项目

（2）activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="5dp"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/tv_phone1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp" />

    <TextView
        android:id="@+id/tv_phone2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp" />

    <TextView
        android:id="@+id/tv_phone3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp" />

    <TextView
        android:id="@+id/tv_phone4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp" />

    <TextView
        android:id="@+id/tv_phone5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp" />

    <TextView
        android:id="@+id/tv_phone6"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp" />

    <TextView
        android:id="@+id/tv_phone7"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp" />

    <TextView
        android:id="@+id/tv_phone8"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="16sp" />

    <TextView
        android:id="@+id/tv_phone9"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp" />

LinearLayout>

(3)MainActivity.java

public class MainActivity extends AppCompatActivity {
     

    private TextView tv_phone1;
    private TextView tv_phone2;
    private TextView tv_phone3;
    private TextView tv_phone4;
    private TextView tv_phone5;
    private TextView tv_phone6;
    private TextView tv_phone7;
    private TextView tv_phone8;
    private TextView tv_phone9;
    private TelephonyManager tManager;
    private String[] phoneType = {
     "未知","2G","3G","4G"};
    private String[] simState = {
     "状态未知","无SIM卡","被PIN加锁","被PUK加锁",
            "被NetWork PIN加锁","已准备好"};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
     
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //①获得系统提供的TelphonyManager对象的实例
        tManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        bindViews();
    }

    private void bindViews() {
     
        tv_phone1 = (TextView) findViewById(R.id.tv_phone1);
        tv_phone2 = (TextView) findViewById(R.id.tv_phone2);
        tv_phone3 = (TextView) findViewById(R.id.tv_phone3);
        tv_phone4 = (TextView) findViewById(R.id.tv_phone4);
        tv_phone5 = (TextView) findViewById(R.id.tv_phone5);
        tv_phone6 = (TextView) findViewById(R.id.tv_phone6);
        tv_phone7 = (TextView) findViewById(R.id.tv_phone7);
        tv_phone8 = (TextView) findViewById(R.id.tv_phone8);
        tv_phone9 = (TextView) findViewById(R.id.tv_phone9);

        tv_phone1.setText("设备编号：" + tManager.getDeviceId());
        tv_phone2.setText("软件版本：" + (tManager.getDeviceSoftwareVersion()!= null?
                tManager.getDeviceSoftwareVersion():"未知"));
        tv_phone3.setText("运营商代号：" + tManager.getNetworkOperator());
        tv_phone4.setText("运营商名称：" + tManager.getNetworkOperatorName());
        tv_phone5.setText("网络类型：" + phoneType[tManager.getPhoneType()]);
        tv_phone6.setText("设备当前位置：" + (tManager.getCellLocation() != null ? tManager
                .getCellLocation().toString() : "未知位置"));
        tv_phone7.setText("SIM卡的国别：" + tManager.getSimCountryIso());
        tv_phone8.setText("SIM卡序列号：" + tManager.getSimSerialNumber());
        tv_phone9.setText("SIM卡状态：" + simState[tManager.getSimState()]);
    }
}

(4)AndroidManifest.xml

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

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

2.3 获取手机信号强度

网络信号强度的单位是dBm(毫瓦分贝)，一般用负数表示，正常手机信号变化范围是从-110dBm (差)到-50dBm(好)之间。
手机获取信号强度代码示例：

dBm =-113+2*asu这是一个固定公式，asu(独立信号单元)

主要代码

MainActivity.java

public class MainActivity extends AppCompatActivity {
     

    private TextView tv_rssi;
    private MyPhoneStateListener mpsListener;
    private TelephonyManager tManager;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
     
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tManager = ((TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE));
        tv_rssi = (TextView) findViewById(R.id.tv_rssi);
        mpsListener  = new MyPhoneStateListener();
        tManager.listen(mpsListener,290);
    }

    private class MyPhoneStateListener extends PhoneStateListener {
     
        private int asu = 0,lastSignal = 0;
        @Override
        public void onSignalStrengthsChanged(SignalStrength signalStrength) {
     
            asu = signalStrength.getGsmSignalStrength();
            lastSignal = -113 + 2 * asu;
            tv_rssi.setText("当前手机的信号强度：" + lastSignal + " dBm" );
            super.onSignalStrengthsChanged(signalStrength);
        }
    }
}

AndroidManifest.xml

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

2.4 监听手机的所有来电

思路：

重写TelephonyManager的一个通话状态监听器PhoneStateListener 然后调用TelephonyManager.listen()的方法进行监听,当来电的时候, 程序就会将来电号码记录到文件中！

实现代码：
MainActivity.java：

public class MainActivity extends Activity  
{
       
    TelephonyManager tManager;  
  
    @Override  
    public void onCreate(Bundle savedInstanceState)  
    {
       
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        // 取得TelephonyManager对象  
        tManager = (TelephonyManager)   
            getSystemService(Context.TELEPHONY_SERVICE);  
        // 创建一个通话状态监听器  
        PhoneStateListener listener = new PhoneStateListener()  
        {
       
            @Override  
            public void onCallStateChanged(int state, String number)  
            {
       
                switch (state)  
                {
       
                // 无任何状态  
                    case TelephonyManager.CALL_STATE_IDLE:  
                        break;  
                    case TelephonyManager.CALL_STATE_OFFHOOK:  
                        break;  
                    // 来电铃响时  
                    case TelephonyManager.CALL_STATE_RINGING:  
                        OutputStream os = null;  
                        try  
                        {
       
                            os = openFileOutput("phoneList", MODE_APPEND);  
                        }  
                        catch (FileNotFoundException e)  
                        {
       
                            e.printStackTrace();  
                        }  
                        PrintStream ps = new PrintStream(os);  
                        // 将来电号码记录到文件中  
                        ps.println(new Date() + " 来电：" + number);  
                        ps.close();  
                        break;  
                    default:  
                        break;  
                }  
                super.onCallStateChanged(state, number);  
            }  
        };  
        // 监听电话通话状态的改变  
        tManager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);  
    }  
}  

AndroidManifest.xml

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

运行效果

注意!要让这个程序位于前台哦!用另一个电话拨打该电话,接着就可以在DDMS的file Explorer的应用 对应包名的files目录下看到phoneList的文件了,我们可以将他导出到电脑中打开,文件的大概内容如下:

THR Oct 30 12:05:48 GMT 2014 来电: 137xxxxxxx

2.5 黑名单来电自动挂断

下面只显示一部分比较主要的代码

MainActivity.java

public class MainActivity extends Activity {
       
  
    private TelephonyManager tManager;  
    private PhoneStateListener pListener;  
    private String number;  
    private EditText locknum;  
    private Button btnlock;  
      
    public class PhonecallListener extends PhoneStateListener  
    {
       
        @Override  
        public void onCallStateChanged(int state, String incomingNumber) {
       
            switch(state)  
            {
       
            case TelephonyManager.CALL_STATE_IDLE:break;  
            case TelephonyManager.CALL_STATE_OFFHOOK:break;  
            //当有电话拨入时  
            case TelephonyManager.CALL_STATE_RINGING:  
                if(isBlock(incomingNumber))  
                {
       
                    try  
                    {
       
                        Method method = Class.forName("android.os.ServiceManager")  
                                .getMethod("getService", String.class);  
                        // 获取远程TELEPHONY_SERVICE的IBinder对象的代理  
                        IBinder binder = (IBinder) method.invoke(null,  
                            new Object[] {
      TELEPHONY_SERVICE });  
                        // 将IBinder对象的代理转换为ITelephony对象  
                        ITelephony telephony = ITelephony.Stub.asInterface(binder);  
                        // 挂断电话  
                        telephony.endCall();  
                    }catch(Exception e){
     e.printStackTrace();}  
                }  
                break;  
            }  
            super.onCallStateChanged(state, incomingNumber);  
        }  
    }  
      
      
    @Override  
    protected void onCreate(Bundle savedInstanceState) {
       
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
          
        locknum = (EditText) findViewById(R.id.locknum);  
        btnlock = (Button) findViewById(R.id.btnlock);  
          
        //获取系统的TelephonyManager管理器  
        tManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);  
        pListener = new PhoneStateListener();  
        tManager.listen(pListener, PhoneStateListener.LISTEN_CALL_STATE);  
          
        btnlock.setOnClickListener(new OnClickListener() {
       
              
            @Override  
            public void onClick(View v) {
       
                number = locknum.getText().toString();                
            }  
        });  
          
    }  
      
    public boolean isBlock(String phone)  
    {
       
        if(phone.equals(number))return true;  
        return false;  
    }  
}

AndroidManifest.xml

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