获取imei信息时如何获取dialogFragment中的上下文

Question

@NonNull
@Override
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    LayoutInflater inflater = getActivity().getLayoutInflater();
    View view = inflater.inflate(R.layout.layout_reg_dialog, null);
    TextView tvIMEI = null;

    builder.setView(view)
            .setTitle("Activer la Version");
    registerKey = view.findViewById(R.id.regiter_key);
    tvIMEI = view.findViewById(R.id.tvIMEI);
    String sIMEI;
    sIMEI = getUniqueIMEIId(getContext(this));
    tvIMEI.setText(sIMEI);
    return builder.create();
}

getUniqueIMEIID 不是 abel this 上下文，当我调用 getContext(this) 时给出错误 image from android studio

public static String getUniqueIMEIId(Context context) {
    TelephonyManager telephonyManager = (TelephonyManager) 
     context.getSystemService(Context.TELEPHONY_SERVICE);
     ...
     String imei = telephonyManager.getDeviceId();
    ...
}

Answer 1

具体错误是什么？是否显示需要 Context 但已通过 Dialog？

如果是，您可以只使用上面使用的 getActivity() 方法来访问上下文。

所以只要打电话

sIMEI = getUniqueIMEIId(getActivity());

Answer 2

将 getContext(this) 替换为 getActivity().getApplicationContext()，它应该可以工作。

Answer 3

如果您使用 dialogFragment 创建对话框，并且 getUniqueIMEIId 像这样：

public static String getUniqueIMEIId(Context context) {
    try {
        TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        if (ActivityCompat.checkSelfPermission(context, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {          
            return "";
        }
        String imei = telephonyManager.getDeviceId();
        Log.e("imei", "=" + imei);
        if (imei != null && !imei.isEmpty()) {
            return imei;
        } else {
            return android.os.Build.SERIAL;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return "not_found";
}

getContext() 是 .

Return the Context this fragment is currently associated with but the getUniqueIMEIId method needs the context

getActivity() 是

Return the FragmentActivity this fragment is currently associated with. May return null if the fragment is associated with a Context instead

在主要情况下它们是相同的。而我们只需要 context。所以我建议你使用 getContext()

获取imei信息时如何获取dialogFragment中的上下文

how to get the context in dialogFragment when get imei info

java

android

contextmenu

android-layout

android-studio