为什么即使我已经给出了代码中的所有权限，该代码也没有在emulator中运行？ TelephonyManager.java package com.lovepurohit.project15； /** *用于telephony manager的程序，该程序意味着访问相关的详细信息 *sim卡和电话号码，如IMEI号码、设备类型等 * *为此，我们使用包中的TelephonyManager类 *android.telephony.telephonymanagerativity； */ 导入android.content.Context； 导入android.os.Bundle； 导入android.support.v7.app.AppActivity； //导入我们的新包 导入android.telephony.TelephonyManager； 导入android.widget.TextView； /** *由Love于2017年7月4日创作。 */ 公共类TelephonyManager实用性扩展了AppCompatActivity{ 文本视图文本视图； @凌驾 创建时受保护的void（Bundle savedInstanceState）{ super.onCreate（savedInstanceState）； setContentView（R.layout.activity\u manager\u telephony）； //获取身份证 textView=（textView）findViewById（R.id.textView）； //访问服务以执行与电话相关的操作 TelephonyManager tm=（TelephonyManager）getSystemService（Context.TELEPHONY_服务）； /** *获取电话类型 *手机是cdma还是gsm */ int type=tm.getPhoneType（）； //获取其他详细信息，如IMEI编号和设备id等 字符串IMEINumber=tm.getDeviceId（）； //正在获取订户ID 字符串subscriberID=tm.getDeviceId（）； //获取Sim卡序列号 字符串SIMSerialNumber=tm.getSimSerialNumber（）； //获取网络详细信息 字符串networkCountryISO=tm.getNetworkCountryIso（）； //获取sim卡国家/地区信息 字符串SIMCountryISO=tm.getSimCountryIso（）； //获取运行应用程序的软件 字符串softwareVersion=tm.getDeviceSoftwareVersion（）； //获取正在运行应用的语音邮件号码 字符串voiceMailNumber=tm.getVoiceMailNumber（）； 字符串strPhoneType=“”； 开关（类型）{ 案例（TelephonyManager.PHONE\u TYPE\u CDMA）： strPhoneType=“CDMA”； 打破 案例（TelephonyManager.PHONE\u TYPE\u GSM）： strPhoneType=“GSM”； 打破 案例（TelephonyManager.PHONE\u TYPE\u NONE）： strPhoneType=“无”； 打破 } 布尔值isRoaming=tm.isNetworkRoaming（）； String phoneInfo=“电话详细信息：\n”； phoneInfo+=“\n IMEI编号：”+IMEINumber； phoneInfo+=“\n SubscriberID:”+SubscriberID； phoneInfo+=“\n SIM卡序列号：”+SIM卡序列号； phoneInfo+=“\n网络国家/地区ISO:”+networkCountryISO； phoneInfo+=“\n SIMCountryISO:”+SIMCountryISO； phoneInfo+=“\n软件版本：”+softwareVersion； phoneInfo+=“\n VoiceMailNumber:”+VoiceMailNumber； phoneInfo+=“\n电话类型：”+strPhoneType； phoneInfo+=“\n正在漫游？：”+正在漫游； textView.setText（phoneInfo）； } } AndroidManifest.xml

我必须在真正的设备上运行它吗？我已经添加了所有权限，但它在模拟器中不起作用。我使用的是API 23，它是棉花糖，你可以在onCreate方法中这样做。我这样做是为了写外部存储，你可以在读电话状态下做同样的事情

if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                   if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                       //Show Information about why you need the permission
                       AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                       builder.setTitle("Need Storage Permission");
                       builder.setMessage("We needs storage permission to proceed");
                       builder.setPositiveButton("Allow", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               dialog.cancel();
                               ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXTERNAL_STORAGE_PERMISSION_CONSTANT);
                           }
                       });
                       builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               dialog.cancel();
                           }
                       });
                       builder.show();
                   } else if (permissionStatus.getBoolean(Manifest.permission.WRITE_EXTERNAL_STORAGE,false)) {
                       //Previously Permission Request was cancelled with 'Dont Ask Again',
                       // Redirect to Settings after showing Information about why you need the permission
                       AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                       builder.setTitle("Storage Permission");
                       builder.setMessage("We need storage permission.");
                       builder.setPositiveButton("Grant", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               dialog.cancel();
                               sentToSettings = true;
                               Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                               Uri uri = Uri.fromParts("package", getPackageName(), null);
                               intent.setData(uri);
                               startActivityForResult(intent, REQUEST_PERMISSION_SETTING);
                               Toast.makeText(getBaseContext(), "Go to Permissions to Grant Storage", Toast.LENGTH_LONG).show();
                           }
                       });
                       builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               dialog.cancel();
                           }
                       });
                       builder.show();
                   } else {
                       //just request the permission
                       ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXTERNAL_STORAGE_PERMISSION_CONSTANT);
                   }


                   SharedPreferences.Editor editor = permissionStatus.edit();
                   editor.putBoolean(Manifest.permission.WRITE_EXTERNAL_STORAGE,true);
                   editor.commit();




               } else {
                   //You already have the permission, just go ahead.
                  textView = (TextView) findViewById(R.id.textView);


//Accessing the service for performing operation related to telephony
TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

/**
 * Getting the phone Type
 * whether phone is cdma or gsm
 */
int type = tm.getPhoneType();

//Getting other details like IMEI number and device id and etc
String IMEINumber = tm.getDeviceId();

//getting subscriber ID
String subscriberID = tm.getDeviceId();

//Getting Sim serial number
String SIMSerialNumber = tm.getSimSerialNumber();

//Getting network details
String networkCountryISO = tm.getNetworkCountryIso();

//Getting sim country info
String SIMCountryISO = tm.getSimCountryIso();

//Getting the software on which app is running
String softwareVersion = tm.getDeviceSoftwareVersion();

//Getting the voice mail number on which app is running
String voiceMailNumber = tm.getVoiceMailNumber();

String strPhoneType = "";
switch (type) {
    case (TelephonyManager.PHONE_TYPE_CDMA):
        strPhoneType = "CDMA";
        break;

    case (TelephonyManager.PHONE_TYPE_GSM):
        strPhoneType = "GSM";
        break;

    case (TelephonyManager.PHONE_TYPE_NONE):
        strPhoneType = "NONE";
        break;

}

boolean isRoaming = tm.isNetworkRoaming();



 String phoneInfo = "Phone Details: \n";
    phoneInfo += "\n IMEI Number: " + IMEINumber;
    phoneInfo += "\n SubscriberID: " + subscriberID;
    phoneInfo += "\n SIM Serial Number: " + SIMSerialNumber;
    phoneInfo += "\n Network Country ISO: " + networkCountryISO;
    phoneInfo += "\n SIMCountryISO: " + SIMCountryISO;
    phoneInfo += "\n SoftwreVersion: " + softwareVersion;
    phoneInfo += "\n VoiceMailNumber: " + voiceMailNumber;
    phoneInfo += "\n Phone Type: " + strPhoneType;
    phoneInfo += "\n Is Roaming? : " + isRoaming;

    textView.setText(phoneInfo);
                   }

 @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
       if (requestCode == REQUEST_PERMISSION_SETTING) {
           if (ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
              // Do the exact thing as in else condition above
           }
       }
   }



@Override
   public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
       super.onRequestPermissionsResult(requestCode, permissions, grantResults);
       if (requestCode == EXTERNAL_STORAGE_PERMISSION_CONSTANT) {
           if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
               // Do the exact thing as in else condition above
           } else {
               if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                   //Show Information about why you need the permission
                   AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                   builder.setTitle("Need Storage Permission");
                   builder.setMessage("This app needs storage permission");
                   builder.setPositiveButton("Grant", new DialogInterface.OnClickListener() {
                       @Override
                       public void onClick(DialogInterface dialog, int which) {
                           dialog.cancel();


                           ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXTERNAL_STORAGE_PERMISSION_CONSTANT);


                       }
                   });
                   builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                       @Override
                       public void onClick(DialogInterface dialog, int which) {
                           dialog.cancel();
                       }
                   });
                   builder.show();
               } else {
                   Toast.makeText(getBaseContext(),"Unable to get Permission",Toast.LENGTH_LONG).show();
               }
           }
       }
   }

---

您必须为实际设备请求运行时许可（请参阅）。 模拟设备没有得到您要求的某些内容，可能会返回null，但其他内容应该会给您提供值。例如，在我的示例中，当我运行以下操作时，模拟设备ID返回00000000000：

TelephonyManager telephonyManager = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);
        int duration = Toast.LENGTH_SHORT;

DeviceId = telephonyManager.getDeviceId() ;
String testToastInfo = DeviceId + "\n";

Toast.makeText(this,testToastInfo , duration).show();

---

希望这有帮助

API级别23的运行时权限代码在哪里？此应用程序无法在Emulator上运行。Emulator没有网络sim卡。试着在实际设备上运行它。请阅读-总结是，这不是一个理想的方式来解决志愿者，可能会适得其反获得答案。请不要将此添加到您的问题中。

if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                   if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                       //Show Information about why you need the permission
                       AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                       builder.setTitle("Need Storage Permission");
                       builder.setMessage("We needs storage permission to proceed");
                       builder.setPositiveButton("Allow", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               dialog.cancel();
                               ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXTERNAL_STORAGE_PERMISSION_CONSTANT);
                           }
                       });
                       builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               dialog.cancel();
                           }
                       });
                       builder.show();
                   } else if (permissionStatus.getBoolean(Manifest.permission.WRITE_EXTERNAL_STORAGE,false)) {
                       //Previously Permission Request was cancelled with 'Dont Ask Again',
                       // Redirect to Settings after showing Information about why you need the permission
                       AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                       builder.setTitle("Storage Permission");
                       builder.setMessage("We need storage permission.");
                       builder.setPositiveButton("Grant", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               dialog.cancel();
                               sentToSettings = true;
                               Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                               Uri uri = Uri.fromParts("package", getPackageName(), null);
                               intent.setData(uri);
                               startActivityForResult(intent, REQUEST_PERMISSION_SETTING);
                               Toast.makeText(getBaseContext(), "Go to Permissions to Grant Storage", Toast.LENGTH_LONG).show();
                           }
                       });
                       builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                           @Override
                           public void onClick(DialogInterface dialog, int which) {
                               dialog.cancel();
                           }
                       });
                       builder.show();
                   } else {
                       //just request the permission
                       ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXTERNAL_STORAGE_PERMISSION_CONSTANT);
                   }


                   SharedPreferences.Editor editor = permissionStatus.edit();
                   editor.putBoolean(Manifest.permission.WRITE_EXTERNAL_STORAGE,true);
                   editor.commit();




               } else {
                   //You already have the permission, just go ahead.
                  textView = (TextView) findViewById(R.id.textView);


//Accessing the service for performing operation related to telephony
TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

/**
 * Getting the phone Type
 * whether phone is cdma or gsm
 */
int type = tm.getPhoneType();

//Getting other details like IMEI number and device id and etc
String IMEINumber = tm.getDeviceId();

//getting subscriber ID
String subscriberID = tm.getDeviceId();

//Getting Sim serial number
String SIMSerialNumber = tm.getSimSerialNumber();

//Getting network details
String networkCountryISO = tm.getNetworkCountryIso();

//Getting sim country info
String SIMCountryISO = tm.getSimCountryIso();

//Getting the software on which app is running
String softwareVersion = tm.getDeviceSoftwareVersion();

//Getting the voice mail number on which app is running
String voiceMailNumber = tm.getVoiceMailNumber();

String strPhoneType = "";
switch (type) {
    case (TelephonyManager.PHONE_TYPE_CDMA):
        strPhoneType = "CDMA";
        break;

    case (TelephonyManager.PHONE_TYPE_GSM):
        strPhoneType = "GSM";
        break;

    case (TelephonyManager.PHONE_TYPE_NONE):
        strPhoneType = "NONE";
        break;

}

boolean isRoaming = tm.isNetworkRoaming();



 String phoneInfo = "Phone Details: \n";
    phoneInfo += "\n IMEI Number: " + IMEINumber;
    phoneInfo += "\n SubscriberID: " + subscriberID;
    phoneInfo += "\n SIM Serial Number: " + SIMSerialNumber;
    phoneInfo += "\n Network Country ISO: " + networkCountryISO;
    phoneInfo += "\n SIMCountryISO: " + SIMCountryISO;
    phoneInfo += "\n SoftwreVersion: " + softwareVersion;
    phoneInfo += "\n VoiceMailNumber: " + voiceMailNumber;
    phoneInfo += "\n Phone Type: " + strPhoneType;
    phoneInfo += "\n Is Roaming? : " + isRoaming;

    textView.setText(phoneInfo);
                   }

 @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
       if (requestCode == REQUEST_PERMISSION_SETTING) {
           if (ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
              // Do the exact thing as in else condition above
           }
       }
   }



@Override
   public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
       super.onRequestPermissionsResult(requestCode, permissions, grantResults);
       if (requestCode == EXTERNAL_STORAGE_PERMISSION_CONSTANT) {
           if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
               // Do the exact thing as in else condition above
           } else {
               if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                   //Show Information about why you need the permission
                   AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                   builder.setTitle("Need Storage Permission");
                   builder.setMessage("This app needs storage permission");
                   builder.setPositiveButton("Grant", new DialogInterface.OnClickListener() {
                       @Override
                       public void onClick(DialogInterface dialog, int which) {
                           dialog.cancel();


                           ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXTERNAL_STORAGE_PERMISSION_CONSTANT);


                       }
                   });
                   builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                       @Override
                       public void onClick(DialogInterface dialog, int which) {
                           dialog.cancel();
                       }
                   });
                   builder.show();
               } else {
                   Toast.makeText(getBaseContext(),"Unable to get Permission",Toast.LENGTH_LONG).show();
               }
           }
       }
   }

TelephonyManager telephonyManager = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);
        int duration = Toast.LENGTH_SHORT;

DeviceId = telephonyManager.getDeviceId() ;
String testToastInfo = DeviceId + "\n";

Toast.makeText(this,testToastInfo , duration).show();