从CordovaActivity调用JavaScript [英] Call JavaScript from CordovaActivity

问题描述

我正在使用Cordova开发一个Android应用程序。我有一个自定义BroadcastReceiver，我想打开主（和唯一一个）CordovaActivity在 onReceive 方法。它工作正常。

I'm developing an Android app with Cordova. I have a custom BroadcastReceiver and I want to open the main (and the only one) CordovaActivity in onReceive method. It works properly.

现在，我需要执行一个Javascript函数，根据意图的额外值来决定显示哪个屏幕（html）。

Now, I need execute a Javascript function to decide which screen (html) show, based on the value of an intent's extra.

MyBroadcastReceiver.java

  public void onReceive(Context context, Intent intent) {
      String myExtra = intent.getStringExtra("myExtra");
      Intent toActivity = new Intent(context, MainCordovaActivity.class);
      toActivity.putExtra("myExtra", myExtra);
      context.startActivity(newActivity);
    }

MainCordovaActivity.java

    public class MainCordovaActivity extends CordovaActivity {
      public void onCreate(Bundle s) {
        super.onCreate(s);
        super.init();
        loadUrl(launchUrl);
        String myExtra = getIntent().getExtras().getString("myExtra");
        //Execute Javascript here
      }
}

是我做的？我是以正确的方式吗？

How can I do that? Am I in the correct way?

感谢。

推荐答案

需要保持回调，以便能够调用成功/错误回调函数在你的插件中过了一段时间后，如这：

You need to keep the callback to be able to invoke success/error callback functions after some time has passed within your plugin like this:

在一些java类方法中：

within some java class method:

PluginResult r = new PluginResult(PluginResult.Status.NO_RESULT);
r.setKeepCallback(true);
callbackContext.sendPluginResult(r);

// assign callbackContext to class property named callbackContext 
this.callbackContext = callbackContext;

然后，您可以将一个字符串（例如序列化的 JSONObject ）传递到在一些java类方法中

Then you can pass a string(for instance serialized JSONObject) into a new instance of PluginResult that is returned to your success/error functions as parameter value:

，返回成功/错误函数的新实例 PluginResult ：

within some java class method:

JSONObject serialized = new JSONObject();

serialized.put("value",1234);

// use assigned class property callbackContext to send some data back to your success callback 
// because of PluginResult.Status.OK and by passing PluginResult.Status.ERROR you invoke error callback
this.callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, serialized));

查看 接受为参数

在您的plugin.js文件中：

within your plugin.js file:

exec(function(serialized){ 
   console.log(serialized.value);// 1234
}, function(){}, "your plugin name", "your plugin action", { some_arg:'for your plugin'});

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