在 Android 中，可以使用 AudioTrack 类以平滑的方式显示音频波形。

以下是一个简单的示例代码：

private void renderWaveform(AudioTrack audioTrack, short[] waveform) {
    final int sampleRate = audioTrack.getSampleRate();
    final int channelCount = audioTrack.getChannelCount();
    final int waveformSize = waveform.length;

    final float[] waveformPoints = new float[waveformSize * 4];

    for (int i = 0; i < waveformSize; i++) {
        final float level = waveform[i] / 32767.0f;
        final int x = (int) (((float) i / (float) waveformSize) * (float) getWidth());
        final int y = (int) ((0.5f + (level * 0.5f)) * (float) getHeight());

        waveformPoints[(i * 4)] = x;
        waveformPoints[(i * 4) + 1] = (y * channelCount) - 1;
        waveformPoints[(i * 4) + 2] = x;
        waveformPoints[(i * 4) + 3] = (y * channelCount) + 1;
    }

    final Paint paint = new Paint();
    paint.setColor(Color.BLUE);
    paint.setStrokeWidth(2.0f);

    final Canvas canvas = new Canvas();
    final Bitmap bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888);
    canvas.setBitmap(bitmap);

    canvas.drawLines(waveformPoints, paint);

    audioTrack.write(bitmapToByteArray(bitmap), 0, bitmap.getByteCount());
}

private byte[] bitmapToByteArray(Bitmap bitmap) {
    final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.ARGB_8888, 100, outputStream);
    return outputStream.toByteArray();
}