无法实现 Google API 示例（语音识别）

Question

我对 Android 开发非常陌生，我正在尝试创建一个基本应用程序，利用 VoiceRecognition 工具来显示语音文本...

package com.example.android.apis.app;

import com.example.android.apis.R;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.List;

/**
 * Sample code that invokes the speech recognition intent API.
 */
public class VoiceRecognition extends Activity implements OnClickListener {

    private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;

    private ListView mList;

    /**
     * Called with the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Inflate our UI from its XML layout description.
        setContentView(R.layout.voice_recognition);

        // Get display items for later interaction
        Button speakButton = (Button) findViewById(R.id.btn_speak);

        mList = (ListView) findViewById(R.id.list);

        // Check to see if a recognition activity is present
        PackageManager pm = getPackageManager();
        List<ResolveInfo> activities = pm.queryIntentActivities(
                new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
        if (activities.size() != 0) {
            speakButton.setOnClickListener(this);
        } else {
            speakButton.setEnabled(false);
            speakButton.setText("Recognizer not present");
        }
    }

    /**
     * Handle the click on the start recognition button.
     */
    public void onClick(View v) {
        if (v.getId() == R.id.btn_speak) {
            startVoiceRecognitionActivity();
        }
    }

    /**
     * Fire an intent to start the speech recognition activity.
     */
    private void startVoiceRecognitionActivity() {
        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");
        startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
    }

    /**
     * Handle the results from the recognition activity.
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
            // Fill the list view with the strings the recognizer thought it could have heard
            ArrayList<String> matches = data.getStringArrayListExtra(
                    RecognizerIntent.EXTRA_RESULTS);
            mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
                    matches));
        }

        super.onActivityResult(requestCode, resultCode, data);
    }
}

我使用 Google 提供的 VoiceRecognition 代码创建了一个类：

编译需要很长时间一直抱怨无法解决的“com.example.android.apis.R”...我导入了API中提供的相关XML文件并将其放入main.xml中

<?xml version="1.0" encoding="utf-8"?>
<!-- 
...
 -->

<!-- This activity displays UI for launching voice recognition -->

<LinearLayout xmlns:android="......."
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingBottom="4dip"
        android:text="@string/voice_recognition_prompt" />

    <Button android:id="@+id/btn_speak"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/speak_button" />

    <ListView android:id="@+id/list"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="1" />

 </LinearLayout>

并且我添加了voice_recognition_prompt和speak_button字符串到值文件（这对我来说是全新的，我不确定我是否以正确的顺序完成了这些事情）。

最后，应用程序编译了，但它只是给出了强制关闭错误消息。我可能错过了任何特定步骤吗？使用此 Google API 示例的一些特定项目配置？

我真的很感谢你的帮助。

Answer 1

你好，Alex，请使用以下 XML 文件：-

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:paddingBottom="4dip"
        android:text="prompt" />

    <Button android:id="@+id/btn_speak" android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:text="speak" />

    <ListView android:id="@+id/list" android:layout_width="fill_parent"
        android:layout_height="0dip" android:layout_weight="1" />
</LinearLayout>

然后检查，你的强制关闭错误已解决。