如何在 Android 应用程序中使用 SpeechRecognizer API?
此示例演示了如何在 Android 中使用 SpeechRecognizer API。
步骤 1 − 在 Android Studio 中创建新项目,转到文件 ⇒ 新建项目并填写所有必需详细信息以创建新项目。
步骤 2 − 将以下代码添加到 res/layout/activity_main.xml。
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="16sp" tools:context=".MainActivity"> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="40dp" android:textSize="16sp" android:textStyle="bold" /> </LinearLayout>
步骤 3 − 将以下代码添加到 src/MainActivity.java
package app.com.sample; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.speech.RecognizerIntent; import android.widget.TextView; import java.util.List; public class MainActivity extends AppCompatActivity { private final int REQUEST_SPEECH_RECOGNIZER = 3000; private TextView textView; private final String mQuestion = "Which company is the largest online retailer on the planet?"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = findViewById(R.id.textView); startSpeechRecognizer(); } private void startSpeechRecognizer() { Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); intent.putExtra(RecognizerIntent.EXTRA_PROMPT, mQuestion); startActivityForResult(intent, REQUEST_SPEECH_RECOGNIZER); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_SPEECH_RECOGNIZER) { if (resultCode == RESULT_OK) { List<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); String mAnswer = results.get(0); if (mAnswer.toUpperCase().contains("AMAZON")) textView.setText(String.format("
Question: %s
Your answer is '%s' and it is correct!", mQuestion, mAnswer)); else textView.setText(String.format("
Question: %s
Your answer is '%s' and it is incorrect!", mQuestion, mAnswer)); } } } }
步骤 4 − 将以下代码添加到 androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-permission android:name="android.permission.RECORD_AUDIO" /> </manifest>
我们来尝试运行你的应用程序。我假设你已经将实际的 Android 移动设备连接到你的计算机。要从 Android Studio 运行应用程序,请打开一个属于你的项目的文件并点击工具栏上的运行 图标。选择你的移动设备作为选项,然后检查你的移动设备,它会显示你的默认屏幕 −
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