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added audio record

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This commit is contained in:
Ahmet Inan 2024-04-12 18:07:47 +02:00
parent 3aaabe6ff7
commit 73766e4624
3 changed files with 115 additions and 1 deletions
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108
app/src/main/java/xdsopl/robot36/MainActivity.java
View file

@ -6,16 +6,103 @@ Copyright 2024 Ahmet Inan <xdsopl@gmail.com>
package xdsopl.robot36;
import android.content.pm.PackageManager;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.Manifest;
import android.widget.TextView;
import androidx.activity.EdgeToEdge;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private float[] recordBuffer;
private AudioRecord audioRecord;
private void setStatus(int id) {
TextView status = (TextView) findViewById(R.id.status);
status.setText(id);
}
private final AudioRecord.OnRecordPositionUpdateListener recordListener = new AudioRecord.OnRecordPositionUpdateListener() {
@Override
public void onMarkerReached(AudioRecord ignore) {
}
@Override
public void onPeriodicNotification(AudioRecord audioRecord) {
audioRecord.read(recordBuffer, 0, recordBuffer.length, AudioRecord.READ_BLOCKING);
}
};
private void initAudioRecord() {
int audioSource = MediaRecorder.AudioSource.UNPROCESSED;
int channelConfig = AudioFormat.CHANNEL_IN_MONO;
int audioFormat = AudioFormat.ENCODING_PCM_FLOAT;
int sampleRate = 8000;
int sampleSize = 4;
int channelCount = 1;
int readsPerSecond = 50;
double bufferSeconds = 0.5;
int bufferSize = (int) (bufferSeconds * sampleRate * sampleSize);
recordBuffer = new float[(sampleRate * channelCount) / readsPerSecond];
try {
audioRecord = new AudioRecord(audioSource, sampleRate, channelConfig, audioFormat, bufferSize);
if (audioRecord.getState() == AudioRecord.STATE_INITIALIZED) {
audioRecord.setRecordPositionUpdateListener(recordListener);
audioRecord.setPositionNotificationPeriod(recordBuffer.length);
startListening();
} else {
setStatus(R.string.audio_init_failed);
}
} catch (IllegalArgumentException e) {
setStatus(R.string.audio_setup_failed);
} catch (SecurityException e) {
setStatus(R.string.audio_permission_denied);
}
}
private void startListening() {
if (audioRecord != null) {
audioRecord.startRecording();
if (audioRecord.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING) {
audioRecord.read(recordBuffer, 0, recordBuffer.length, AudioRecord.READ_BLOCKING);
setStatus(R.string.listening);
} else {
setStatus(R.string.audio_recording_error);
}
}
}
private void stopListening() {
if (audioRecord != null)
audioRecord.stop();
}
private final int permissionID = 1;
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode != permissionID)
return;
for (int i = 0; i < permissions.length; ++i)
if (permissions[i].equals(Manifest.permission.RECORD_AUDIO) && grantResults[i] == PackageManager.PERMISSION_GRANTED)
initAudioRecord();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
@ -26,5 +113,26 @@ public class MainActivity extends AppCompatActivity {
v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
return insets;
});
List<String> permissions = new ArrayList<>();
if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
permissions.add(Manifest.permission.RECORD_AUDIO);
setStatus(R.string.audio_permission_denied);
} else {
initAudioRecord();
}
if (!permissions.isEmpty())
ActivityCompat.requestPermissions(this, permissions.toArray(new String[0]), permissionID);
}
@Override
protected void onResume() {
startListening();
super.onResume();
}
@Override
protected void onPause() {
stopListening();
super.onPause();
}
}

1
app/src/main/res/layout/activity_main.xml
View file

@ -8,6 +8,7 @@
tools:context=".MainActivity">
<TextView
android:id="@+id/status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"

7
app/src/main/res/values/strings.xml
View file

@ -1,3 +1,8 @@
<resources>
<string name="app_name">Robot36</string>
</resources>
<string name="listening">listening</string>
<string name="audio_init_failed">audio init failed</string>
<string name="audio_setup_failed">audio setup failed</string>
<string name="audio_permission_denied">audio permission denied</string>
<string name="audio_recording_error">audio recording error</string>
</resources>