Android 无法解析符号MY\u权限\u访问\u位置

我犯了和你一样的错误。所以我在活动课上创建了他的doCheckPermission。现在，有一个问题。活动课上说：

java.lang.SecurityException:getCellLocation:用户10074和当前进程都没有android.permission.ACCESS\u位置

数据许可检查

我的舱单是：

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

    <uses-feature
        android:name="android.hardware.telephony"
        android:required="true" />

    <!-- Permission needed to read TelephoneManager data-->
        <uses-permission android:name="android.permission.READ_PHONE_STATE" />
        <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <!-- END -->

    <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>
        <activity android:name=".TelephonyStatusActivity"></activity>
    </application>

</manifest>            

---

我仍然会遇到与以前相同的错误

您必须自己定义我的权限访问位置。这是一个您必须指定的字段。

在使用它之前，您需要定义我的权限\u访问\u位置

public class MainActivity extends Activity{

   int MY_PERMISSION_ACCESS_COARSE_LOCATION = 1;



  private void doPermissionCheck() {
    // This checks whether your app is granted permission to access coarse location of the user.
    if (ContextCompat.checkSelfPermission(getApplicationContext(),
            Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED ) {
        // if permission is not already granted to your app for location access then call requestPermissions to request that permission. 
        //This opens up a dialog before user to ask for permission. 
        //The integer MY_PERMISSION_ACCESS_COARSE_LOCATION that is passed acts like a unique identifier for this request and is used to 
        //track whether user has granted the permission or denied. 
        //See the below callback function onRequestPermissionsResult which is called after user had taken some action on that permission dialog
        ActivityCompat.requestPermissions(TelephonyStatusActivity.this,
                new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                MY_PERMISSION_ACCESS_COARSE_LOCATION); 
    }
  }

  //This method is called after user has taken some action over the permission dialog
  @Override
  public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        // Here you can access the result for your requested permission
        // Now you use the integer MY_PERMISSION_ACCESS_COARSE_LOCATION which acts as a unique identifier for your permission
        case MY_PERMISSION_ACCESS_COARSE_LOCATION: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //Permission is granted by the user on permission dialog
            } else {
                //Permission is not granted by the user on permission dialog
            }
        }
        case : SOME_OTHER_PERMISSION_UNIQUE_ID : {
             //This corresponds to some other permission request
        }
    }
 }

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

    // you need to call the method here
    doPermissionCheck();

    final TelephonyManager telMgr = (TelephonyManager)
            getSystemService(Context.TELEPHONY_SERVICE);

    btnPhoneStatus = (Button) findViewById(R.id.btnPhoneStatus);
    btnEffacer = (Button) findViewById(R.id.btnEffacer);
    txtPhoneStatus = (TextView) findViewById(R.id.txtPhoneStatus);

    btnPhoneStatus.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            txtPhoneStatus.setText(getTelephonyOverview(telMgr));
        }
    });

    btnEffacer.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            txtPhoneStatus.setText("");
        }
    });
   }



  }

---

自己定义权限

public static final int REQUEST_COARSE_LOCATION = 2; 

    ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                   MY_PERMISSION_ACCESS_COARSE_LOCATION );

---

没有与我的权限访问位置匹配的权限。您不能使用随机字符串并期望它工作。您是否定义了int MY_PERMISSION\u ACCESS\u rough\u LOCATION=；我在哪里定义它？看答案。您应该在类定义的下方，在和方法之前定义它。我应该为此提供什么int值？android.Manifest.permission.ACCESS\u rough\u LOCATION是字符串，如果我为我的\u permission\u ACCESS\u rough\u LOCATION解析它，它会解决我的问题吗？我得到了java.lang.NumberFormatException:输入字符串：android.permission.ACCESS\u rough\u LOCATION尝试输入我的\u permission\u rough\u LOCATION=Integer.parseIntManifest.permission.ACCESS\u位置；请参阅更新答案。整数是您的选择。它充当权限请求的唯一标识符。如果您请求多个权限，您可以使用唯一ID来标识它们，并知道哪些权限已被授予，哪些权限已被拒绝。onRequestPermissionsResult回调在用户通过权限对话框执行某些操作时触发。在此方法中，您可以检查每个请求的权限，并检查每个权限的结果。我在哪里定义它？

public class MainActivity extends Activity{

   int MY_PERMISSION_ACCESS_COARSE_LOCATION = 1;



  private void doPermissionCheck() {
    // This checks whether your app is granted permission to access coarse location of the user.
    if (ContextCompat.checkSelfPermission(getApplicationContext(),
            Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED ) {
        // if permission is not already granted to your app for location access then call requestPermissions to request that permission. 
        //This opens up a dialog before user to ask for permission. 
        //The integer MY_PERMISSION_ACCESS_COARSE_LOCATION that is passed acts like a unique identifier for this request and is used to 
        //track whether user has granted the permission or denied. 
        //See the below callback function onRequestPermissionsResult which is called after user had taken some action on that permission dialog
        ActivityCompat.requestPermissions(TelephonyStatusActivity.this,
                new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                MY_PERMISSION_ACCESS_COARSE_LOCATION); 
    }
  }

  //This method is called after user has taken some action over the permission dialog
  @Override
  public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        // Here you can access the result for your requested permission
        // Now you use the integer MY_PERMISSION_ACCESS_COARSE_LOCATION which acts as a unique identifier for your permission
        case MY_PERMISSION_ACCESS_COARSE_LOCATION: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //Permission is granted by the user on permission dialog
            } else {
                //Permission is not granted by the user on permission dialog
            }
        }
        case : SOME_OTHER_PERMISSION_UNIQUE_ID : {
             //This corresponds to some other permission request
        }
    }
 }

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

    // you need to call the method here
    doPermissionCheck();

    final TelephonyManager telMgr = (TelephonyManager)
            getSystemService(Context.TELEPHONY_SERVICE);

    btnPhoneStatus = (Button) findViewById(R.id.btnPhoneStatus);
    btnEffacer = (Button) findViewById(R.id.btnEffacer);
    txtPhoneStatus = (TextView) findViewById(R.id.txtPhoneStatus);

    btnPhoneStatus.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            txtPhoneStatus.setText(getTelephonyOverview(telMgr));
        }
    });

    btnEffacer.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            txtPhoneStatus.setText("");
        }
    });
   }



  }

public static final int REQUEST_COARSE_LOCATION = 2; 

    ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                   MY_PERMISSION_ACCESS_COARSE_LOCATION );