android - 开发 Ionic/Cordova 插件 - 插件无法构建

Question

我目前正在从事一个使用 Ionic/Cordova 开发 android 应用程序的项目。在这个应用程序中，我们需要使用 EAP TTLS 自动连接到 wifi 网络，为此我们正在开发一个 cordova 插件。

正如许多教程所建议的那样，我们通过创建一个完全符合我们要求的 Android 应用程序开始开发。接下来，我们把它变成了一个插件。到那时一切都很好，我们实现了所需的功能并将插件添加到 Ionic 项目中而没有错误。

现在，当我们执行命令 ionic build 时，我们收到许多与插件中使用的导入相关的错误，例如:

import android.net.wifi.WifiConfiguration; 
import android.net.wifi.WifiManager; 
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiEnterpriseConfig;
import android.net.wifi.WifiManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

根据开发前所做的所有研究，我们了解到您可以直接为 Android 开发的任何应用程序都可以转换为插件。因此，我认为我们在这个过程中错过了一个重要的步骤，或者采取了错误的开发方法。

谁能帮我解决这个问题，或者给我一些构建 Ionic/Cordova 插件的正确方法的建议？

这是错误日志的副本:

  ConnectivityChangeReceiver.java:19: error: cannot find symbol
import com.wbinnova.adsfinetworkplugin.R;
                                      ^
  symbol:   class R
  location: package com.wbinnova.adsfinetworkplugin
  ConnectionActivity.java:9: error: package android.support.v7.app does not exist
import android.support.v7.app.ActionBarActivity;
                             ^
  ConnectionActivity.java:17: error: cannot find symbol
public class ConnectionActivity extends ActionBarActivity {
                                        ^
  symbol: class ActionBarActivity
  ScanActivity.java:13: error: package android.support.v7.app does not exist
import android.support.v7.app.ActionBarActivity;
                             ^
  ScanActivity.java:21: error: cannot find symbol
public class ScanActivity extends ActionBarActivity {
                                  ^
  symbol: class ActionBarActivity
  ConnectivityChangeReceiver.java:93: error: package R does not exist
                Notification notification = new Notification(R.mipmap.ic_launcher, "Red Ads-Fi disponible", System.currentTimeMillis());
                                                              ^
  ConnectionActivity.java:24: error: cannot find symbol
        super.onCreate(savedInstanceState);
        ^
  symbol:   variable super
  location: class ConnectionActivity
  ConnectionActivity.java:27: error: cannot find symbol
        wifiManag = (WifiManager) getSystemService(Context.WIFI_SERVICE);
                                  ^
  symbol:   method getSystemService(String)
  location: class ConnectionActivity
  ConnectionActivity.java:53: error: no suitable constructor found for Builder(ConnectionActivity)
        AlertDialog.Builder builder = new AlertDialog.Builder(ConnectionActivity.this);
                                      ^
    constructor Builder.Builder(Context,int) is not applicable
      (actual and formal argument lists differ in length)
    constructor Builder.Builder(Context) is not applicable
      (actual argument ConnectionActivity cannot be converted to Context by method invocation conversion)
  ConnectionActivity.java:22: error: method does not override or implement a method from a supertype
    @Override
    ^
  ConnectionActivity.java:62: error: package R does not exist
        getMenuInflater().inflate(R.menu.menu_main, menu);
                                   ^
  ConnectionActivity.java:62: error: cannot find symbol
        getMenuInflater().inflate(R.menu.menu_main, menu);
        ^
  symbol:   method getMenuInflater()
  location: class ConnectionActivity
  ConnectionActivity.java:59: error: method does not override or implement a method from a supertype
    @Override
    ^
  ConnectionActivity.java:71: error: package R does not exist
        if (id == R.id.action_settings) {
                   ^
  ConnectionActivity.java:75: error: cannot find symbol
        return super.onOptionsItemSelected(item);
               ^
  symbol:   variable super
  location: class ConnectionActivity
  ConnectionActivity.java:66: error: method does not override or implement a method from a supertype
    @Override
    ^
  ScanActivity.java:35: error: cannot find symbol
        super.onCreate(savedInstanceState);
        ^
  symbol:   variable super
  location: class ScanActivity
  ScanActivity.java:36: error: package R does not exist
        setContentView(R.layout.activity_main);
                        ^
  ScanActivity.java:39: error: cannot find symbol
        mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
                                 ^
  symbol:   method getSystemService(String)
  location: class ScanActivity
  ScanActivity.java:33: error: method does not override or implement a method from a supertype
    @Override
    ^
  ScanActivity.java:54: error: package R does not exist
        getMenuInflater().inflate(R.menu.menu_main, menu);
                                   ^
  ScanActivity.java:54: error: cannot find symbol
        getMenuInflater().inflate(R.menu.menu_main, menu);
        ^
  symbol:   method getMenuInflater()
  location: class ScanActivity
  ScanActivity.java:51: error: method does not override or implement a method from a supertype
    @Override
    ^
  ScanActivity.java:63: error: package R does not exist
        if (id == R.id.action_settings) {
                   ^
  ScanActivity.java:67: error: cannot find symbol
        return super.onOptionsItemSelected(item);
               ^
  symbol:   variable super
  location: class ScanActivity
  ScanActivity.java:58: error: method does not override or implement a method from a supertype
    @Override
    ^
  ScanActivity.java:74: error: cannot find symbol
        mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
                                 ^
  symbol:   method getSystemService(String)
  location: class ScanActivity
  ScanActivity.java:99: error: cannot find symbol
        WifiManager wifiManag = (WifiManager) getSystemService(Context.WIFI_SERVICE);
                                              ^
  symbol:   method getSystemService(String)
  location: class ScanActivity
  ScanActivity.java:153: error: cannot find symbol
            Intent intent2 = new Intent(ScanActivity.this, ConectionActivity.class);
                                                           ^
  symbol:   class ConectionActivity
  location: class ScanActivity
  ScanActivity.java:154: error: cannot find symbol
            startActivity(intent2);
            ^
  symbol:   method startActivity(Intent)
  location: class ScanActivity

Answer 1

看来您正在创建一个 Java 操作，您需要创建一个简单的 Java 类，其中包含一些函数，这些函数允许您将该 Java 类转换为 cordova 的插件

在这里你可以找到如何创建一个简单的 echo 插件:

https://cordova.apache.org/docs/en/2.5.0/guide/plugin-development/android/

注意它扩展了CordovaPlugIn，主要功能是execute，有3个参数

• 将要执行的 Action 的名称。字符串参数
• 论点。 JSONArray参数
• 回调。这将在函数结束时调用，如果您想返回一个值，将其作为函数成功或错误的参数传递