将消息从活动发送到服务 - Android [英] Send message from Activity to Service - Android

问题描述

我正在为 Android 编写一个键盘替换应用程序，我需要足够定制的键盘，以便我需要在 Activity 中运行它，而不是将它保留在 InputMethodService 类中.下面是我从 InputMethodService 类调用键盘的方法:

I am writing a keyboard replacement app for Android, and I needed the keyboard customized enough that I need to run it in an Activity, instead of keeping it in the InputMethodService class. Here is how I call the keyboard from my InputMethodService class:

    @Override public void onStartInputView(EditorInfo attribute, boolean restarting) {
    super.onStartInputView(attribute, restarting);

    Intent intent = new Intent(this, Keyboard.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
    context.startActivity(intent);

}

我现在遇到了一个问题，我无法更新应该从键盘输入的文本字段.我尝试在我的服务类中创建一个静态 InputConnection，然后从 Activity 更新它，但没有任何反应.

I have now run into the problem that I can't update the text field where the input from the keyboard should go. I tried creating a static InputConnection, in my service class, then updating it from the Activity, but nothing happens.

所以我想这是我的问题:我能够找到很多关于如何将数据从服务发送到活动的信息，但没有关于将数据从活动发送到服务(特别是输入法服务)的信息.有人知道怎么做吗?

So I guess here is my question: I was able to find lots of info about how to send data from a Service to an Activity, but nothing about sending data from an Activity to a Service(specifically an input method service). Does anyone know how to do this?

推荐答案

为此使用 Binder.

Use a Binder for that.

这个关于音乐播放器服务的教程是一个很好的例子http://www.helloandroid.com/tutorials/musicdroid-audio-player-part-ii

This tutorial about music player service is a good sample http://www.helloandroid.com/tutorials/musicdroid-audio-player-part-ii

尤其是这一行

mpInterface.addSongPlaylist(file.getName());

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